{"id":2638,"date":"2025-10-02T01:47:48","date_gmt":"2025-10-02T01:47:48","guid":{"rendered":"https:\/\/productionscrews.com\/"},"modified":"2025-10-02T01:47:48","modified_gmt":"2025-10-02T01:47:48","slug":"expert-guide-antenna-mounting-science-engineering-for-peak-performance","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/expert-guide-antenna-mounting-science-engineering-for-peak-performance\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn chuy\u00ean gia: Khoa h\u1ecdc &amp; K\u1ef9 thu\u1eadt l\u1eafp \u0111\u1eb7t anten \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a"},"content":{"rendered":"<h2>Khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt l\u1eafp \u0111\u1eb7t anten ho\u00e0n h\u1ea3o: H\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt<\/h2>\n<p>L\u1eddi khuy\u00ean \u0111i\u1ec3n h\u00ecnh v\u1ec1 vi\u1ec7c l\u1eafp \u0111\u1eb7t anten l\u00e0 \u0111\u01a1n gi\u1ea3n: \u201cl\u1eafp c\u00e0ng cao c\u00e0ng t\u1ed1t.\u201d M\u1eb7c d\u00f9 \u0111i\u1ec1u n\u00e0y kh\u00f4ng sai, nh\u01b0ng quy t\u1eafc \u0111\u01a1n gi\u1ea3n n\u00e0y ch\u1ec9 ch\u1ea1m v\u00e0o b\u1ec1 n\u1ed5i c\u1ee7a m\u1ed9t l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p. Vi\u1ec7c c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t th\u1ef1c s\u1ef1 v\u00e0 an to\u00e0n l\u00e2u d\u00e0i kh\u00f4ng ch\u1ec9 d\u1ef1a v\u00e0o \u0111\u1ed9 cao, m\u00e0 c\u00f2n d\u1ef1a v\u00e0o vi\u1ec7c \u00e1p d\u1ee5ng c\u1ea9n th\u1eadn c\u00e1c nguy\u00ean t\u1eafc khoa h\u1ecdc. Vi\u1ec7c l\u1eafp \u0111\u1eb7t ho\u00e0n h\u1ea3o \u0111\u00f2i h\u1ecfi hi\u1ec3u r\u00f5 c\u00e1ch c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 v\u1eadt l\u00fd t\u00edn hi\u1ec7u, k\u1ef9 thu\u1eadt k\u1ebft c\u1ea5u, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb v\u00e0 an to\u00e0n \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau. \u0110i\u1ec1u n\u00e0y <a href=\"https:\/\/productionscrews.com\/vi\/color-blending-math-science-technical-guide-for-developers-2025\/\"  data-wpil-monitor-id=\"458\" target=\"_blank\">h\u01b0\u1edbng d\u1eabn v\u01b0\u1ee3t ra ngo\u00e0i c\u00e1c m\u1eb9o c\u01a1 b\u1ea3n \u0111\u1ec3 cung c\u1ea5p cho b\u1ea1n c\u00e1c ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt<\/a> n\u1ec1n t\u1ea3ng \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh th\u00f4ng minh.<\/p>\n<p>B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p m\u1ed9t cu\u1ed9c kh\u00e1m ph\u00e1 to\u00e0n di\u1ec7n v\u1ec1 vi\u1ec7c l\u1eafp \u0111\u1eb7t anten chuy\u00ean nghi\u1ec7p, bao g\u1ed3m:<\/p>\n<ul>\n<li>C\u00e1c <a href=\"https:\/\/productionscrews.com\/vi\/essential-guide-to-torque-testing-from-basic-physics-to-professional-methods\/\"  data-wpil-monitor-id=\"453\" target=\"_blank\">v\u1eadt l\u00fd c\u01a1 b\u1ea3n<\/a> \u0111i\u1ec1u khi\u1ec3n c\u00e1ch t\u00edn hi\u1ec7u di chuy\u1ec3n v\u00e0 t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li>C\u01a1 h\u1ecdc c\u1ea5u tr\u00fac c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t c\u00f4ng tr\u00ecnh an to\u00e0n, b\u1ec1n l\u00e2u c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng c\u00e1c l\u1ef1c t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li>C\u00e1c nguy\u00ean t\u1eafc t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb \u0111\u1ec3 ng\u0103n ch\u1eb7n ch\u00ednh gi\u00e1 \u0111\u1ee1 l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u.<\/li>\n<li>C\u00e1c y\u00eau c\u1ea7u c\u1ea7n thi\u1ebft v\u1ec1 n\u1ed1i \u0111\u1ea5t \u0111i\u1ec7n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-1508868.jpg\" target=\"_blank\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-1508868.jpg\" height=\"874\" width=\"1280\" class=\"alignnone size-full wp-image-2642\" alt=\"C\u1eadn c\u1ea3nh m\u1ed9t anten \u0111\u01b0\u1ee3c g\u1eafn tr\u00ean c\u1ed9t b\u1eb1ng v\u00edt v\u00e0 bu l\u00f4ng c\u00f4ng nghi\u1ec7p, th\u1ec3 hi\u1ec7n l\u1eafp \u0111\u1eb7t an to\u00e0n \u0111\u1ec3 t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t t\u00edn hi\u1ec7u.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-1508868.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-1508868-300x205.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-1508868-768x524.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-1508868-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/> <\/a><\/p>\n<h2>L\u1eafp \u0111\u1eb7t Anten k\u1ef9 thu\u1eadt l\u00e0 g\u00ec?<\/h2>\n<p>T\u1eeb g\u00f3c \u0111\u1ed9 k\u1ef9 thu\u1eadt, vi\u1ec7c l\u1eafp \u0111\u1eb7t anten kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 v\u1eadt l\u00fd c\u1ee7a vi\u1ec7c g\u1eafn ph\u1ea7n c\u1ee9ng. \u0110\u00f3 l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng <a href=\"https:\/\/productionscrews.com\/vi\/5-secrets-of-heat-treatment-process-engineering-metal-properties-revealed\/\"  data-wpil-monitor-id=\"454\" target=\"_blank\">qu\u00e1 tr\u00ecnh k\u1ef9 thu\u1eadt<\/a> \u0111i\u1ec1u ch\u1ec9nh ph\u1ea7n l\u1edbn hi\u1ec7u su\u1ea5t v\u00e0 an to\u00e0n t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RF). N\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c k\u1ebft h\u1ee3p nhi\u1ec1u l\u0129nh v\u1ef1c nghi\u00ean c\u1ee9u \u0111\u1ec3 \u0111\u1eb7t anten ph\u00f9 h\u1ee3p v\u1ec1 v\u1ecb tr\u00ed v\u00e0 h\u01b0\u1edbng, \u0111\u1ea3m b\u1ea3o n\u00f3 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng c\u00e1c \u00e1p l\u1ef1c m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t v\u00f2ng \u0111\u1eddi ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3. C\u00e1c kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 l\u00e0:<\/p>\n<ul>\n<li>V\u1eadt l\u00fd T\u1ea7n s\u1ed1 Radio (RF): C\u00e1ch chi\u1ec1u cao, v\u1ecb tr\u00ed v\u00e0 h\u01b0\u1edbng c\u1ee7a m\u1ed9t anten \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u, ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 kh\u1ea3 n\u0103ng v\u01b0\u1ee3t qua ch\u01b0\u1edbng ng\u1ea1i v\u1eadt \u0111\u1ec3 nh\u1eadn v\u00e0 truy\u1ec1n t\u00edn hi\u1ec7u.<\/li>\n<li>K\u1ef9 thu\u1eadt k\u1ebft c\u1ea5u: C\u00e1ch t\u00ednh to\u00e1n v\u00e0 ch\u1ed1ng l\u1ea1i c\u00e1c l\u1ef1c t\u00e1c \u0111\u1ed9ng, ch\u1ee7 y\u1ebfu l\u00e0 l\u1ef1c gi\u00f3, \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c l\u1eafp \u0111\u1eb7t an to\u00e0n, \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u00f4ng g\u00e2y nguy hi\u1ec3m cho t\u00e0i s\u1ea3n ho\u1eb7c con ng\u01b0\u1eddi.<\/li>\n<li>\u0110i\u1ec7n t\u1eeb h\u1ecdc &amp; <a href=\"https:\/\/productionscrews.com\/vi\/the-science-behind-elastic-material-from-bridges-to-medical-breakthroughs\/\"  data-wpil-monitor-id=\"457\" target=\"_blank\">Khoa h\u1ecdc v\u1eadt li\u1ec7u<\/a>C\u00e1ch c\u00e1c b\u1ed9 ph\u1eadn l\u1eafp \u0111\u1eb7t, c\u1ed9t anten, v\u00e0 c\u00e1c v\u1eadt kim lo\u1ea1i g\u1ea7n \u0111\u00f3 c\u00f3 th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb c\u1ee7a anten, c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3, v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tu\u1ed5i th\u1ecd.<\/li>\n<\/ul>\n<p>&#8212;<\/p>\n<h2>V\u1eadt l\u00fd c\u1ee7a s\u1ef1 truy\u1ec1n t\u00edn hi\u1ec7u<\/h2>\n<p>\u0110\u1ec3 t\u1ed1i \u01b0u h\u00f3a v\u1ecb tr\u00ed c\u1ee7a anten, tr\u01b0\u1edbc ti\u00ean ch\u00fang ta ph\u1ea3i hi\u1ec3u c\u00e1c nguy\u00ean l\u00fd v\u1eadt l\u00fd x\u00e1c \u0111\u1ecbnh c\u00e1ch s\u00f3ng radio truy\u1ec1n t\u1eeb b\u1ed9 ph\u00e1t \u0111\u1ebfn b\u1ed9 thu. Ki\u1ebfn th\u1ee9c n\u00e0y gi\u00fap ng\u01b0\u1eddi l\u1eafp \u0111\u1eb7t ch\u1ea9n \u0111o\u00e1n c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u00edn hi\u1ec7u v\u00e0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean t\u1eafc khoa h\u1ecdc thay v\u00ec \u0111o\u00e1n m\u00f2.<\/p>\n<h3>T\u1ea7m nh\u00ecn tr\u1ef1c ti\u1ebfp v\u00e0 v\u01b0\u1ee3t ra ngo\u00e0i<\/h3>\n<p>Kh\u00e1i ni\u1ec7m v\u1ec1 \u0110\u01b0\u1eddng nh\u00ecn tr\u1ef1c ti\u1ebfp (LOS) l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a nhi\u1ec1u h\u1ec7 th\u1ed1ng RF, \u0111\u1eb7c bi\u1ec7t \u1edf t\u1ea7n s\u1ed1 cao nh\u01b0 truy\u1ec1n h\u00ecnh UHF, m\u1ea1ng di \u0111\u1ed9ng 5G v\u00e0 Wi-Fi. Tuy nhi\u00ean, LOS RF ph\u1ee9c t\u1ea1p h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n tr\u1ef1c quan \u0111\u01a1n gi\u1ea3n.<\/p>\n<ul>\n<li>T\u1ea7m nh\u00ecn tr\u1ef1c quan so v\u1edbi t\u1ea7m nh\u00ecn RF: M\u1ed9t \u0111\u01b0\u1eddng nh\u00ecn tr\u1ef1c quan r\u00f5 r\u00e0ng l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u t\u1ed1t, nh\u01b0ng kh\u00f4ng \u0111\u1ea3m b\u1ea3o c\u00f3 \u0111\u01b0\u1eddng RF r\u00f5 r\u00e0ng. S\u00f3ng v\u00f4 tuy\u1ebfn b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec1u y\u1ebfu t\u1ed1 h\u01a1n l\u00e0 ch\u1ec9 c\u00e1c v\u1eadt th\u1ec3 r\u1eafn. Ch\u00ednh kh\u00ed quy\u1ec3n c\u0169ng c\u00f3 th\u1ec3 u\u1ed1n cong s\u00f3ng v\u00f4 tuy\u1ebfn, cho ph\u00e9p ch\u00fang \u0111i xa h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi ch\u00e2n tr\u1eddi tr\u1ef1c quan. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, g\u1ecdi l\u00e0 ch\u00e2n tr\u1eddi v\u00f4 tuy\u1ebfn, kho\u1ea3ng b\u1eb1ng 4\/3 so v\u1edbi ch\u00e2n tr\u1eddi h\u00ecnh h\u1ecdc.<\/li>\n<li>\u1ea2nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ed9 cao: T\u0103ng chi\u1ec1u cao c\u1ee7a antenn\u0103 mang l\u1ea1i hai l\u1ee3i \u00edch ch\u00ednh. Th\u1ee9 nh\u1ea5t, n\u00f3 tr\u1ef1c ti\u1ebfp n\u00e2ng antenn\u0103 l\u00ean tr\u00ean c\u00e1c ch\u01b0\u1edbng ng\u1ea1i v\u1eadt \u1edf m\u1ee9c \u0111\u1ea5t g\u1ea7n \u0111\u00f3. Th\u1ee9 hai, n\u00f3 m\u1edf r\u1ed9ng t\u1ea7m nh\u00ecn c\u1ee7a t\u00edn hi\u1ec7u nh\u1edd v\u00e0o \u0111\u1ed9 cong c\u1ee7a Tr\u00e1i \u0111\u1ea5t. M\u1ed9t antenn\u0103 cao h\u01a1n c\u00f3 th\u1ec3 \u201cnh\u00ecn th\u1ea5y\u201d tr\u1ea1m ph\u00e1t s\u00f3ng m\u00e0 n\u1ebfu kh\u00f4ng s\u1ebd b\u1ecb che khu\u1ea5t d\u01b0\u1edbi ch\u00e2n tr\u1eddi.<\/li>\n<li>Ch\u01b0\u1edbng ng\u1ea1i v\u1eadt: C\u00e1c v\u1eadt th\u1ec3 tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 h\u1ea5p th\u1ee5, ph\u1ea3n x\u1ea1 ho\u1eb7c kh\u00fac x\u1ea1 n\u0103ng l\u01b0\u1ee3ng RF.<\/li>\n<li>H\u1ea5p th\u1ee5: C\u00e1c v\u1eadt li\u1ec7u \u0111\u1eb7c, phi kim lo\u1ea1i l\u00e0 th\u1ee7 ph\u1ea1m ch\u00ednh g\u00e2y h\u1ea5p th\u1ee5 t\u00edn hi\u1ec7u. L\u00e1 c\u00e2y (\u0111\u1eb7c bi\u1ec7t khi \u1ea9m \u01b0\u1edbt), t\u01b0\u1eddng b\u00ea t\u00f4ng d\u00e0y v\u00e0 c\u00e1c c\u1ea5u tr\u00fac b\u1eb1ng g\u1ea1ch h\u1ea5p th\u1ee5 l\u01b0\u1ee3ng l\u1edbn n\u0103ng l\u01b0\u1ee3ng RF, chuy\u1ec3n \u0111\u1ed5i th\u00e0nh nhi\u1ec7t v\u00e0 l\u00e0m y\u1ebfu t\u00edn hi\u1ec7u.<\/li>\n<li>Ph\u1ea3n x\u1ea1 v\u00e0 \u0111a \u0111\u01b0\u1eddng: S\u00f3ng v\u00f4 tuy\u1ebfn ph\u1ea3n x\u1ea1 kh\u1ecfi c\u00e1c b\u1ec1 m\u1eb7t l\u1edbn ph\u1eb3ng nh\u01b0 t\u00f2a nh\u00e0, th\u00e1p n\u01b0\u1edbc ho\u1eb7c s\u01b0\u1eddn \u0111\u1ed3i. Khi c\u00e1c t\u00edn hi\u1ec7u ph\u1ea3n x\u1ea1 n\u00e0y \u0111\u1ebfn anten thu kh\u00f4ng c\u00f9ng pha v\u1edbi t\u00edn hi\u1ec7u tr\u1ef1c ti\u1ebfp, ch\u00fang c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 tri\u1ec7t ti\u00eau m\u1ed9t ph\u1ea7n ho\u1eb7c ho\u00e0n to\u00e0n. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, g\u1ecdi l\u00e0 fading \u0111a \u0111\u01b0\u1eddng, l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y m\u1ea5t t\u00edn hi\u1ec7u v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng \u201cma\u201d k\u1ef9 thu\u1eadt s\u1ed1. V\u1ecb tr\u00ed \u0111\u1eb7t anten chi\u1ebfn l\u01b0\u1ee3c, th\u1eadm ch\u00ed di chuy\u1ec3n anten v\u00e0i b\u01b0\u1edbc ch\u00e2n, th\u01b0\u1eddng c\u00f3 th\u1ec3 t\u00ecm ra \u0111i\u1ec3m \u201cng\u1ecdt\u201d gi\u1ea3m thi\u1ec3u nhi\u1ec5u \u0111a \u0111\u01b0\u1eddng g\u00e2y h\u1ea1i.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-J1QCb43oNUI.jpg\" height=\"903\" width=\"1600\" class=\"alignnone size-full wp-image-2641\" alt=\"M\u1ed9t chi\u1ebfc antenna \u0111\u01b0\u1ee3c l\u1eafp tr\u00ean c\u1ed9t \u0111\u00e8n cao v\u1edbi n\u1ec1n tr\u1eddi trong xanh, minh h\u1ecda cho vi\u1ec7c l\u1eafp \u0111\u1eb7t hi\u1ec7u qu\u1ea3 \u0111\u1ec3 ti\u1ebfp nh\u1eadn t\u00edn hi\u1ec7u t\u1ed1i \u01b0u.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-J1QCb43oNUI.jpg 1600w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-J1QCb43oNUI-300x169.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-J1QCb43oNUI-768x433.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-J1QCb43oNUI-1536x867.jpg 1536w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-J1QCb43oNUI-18x10.jpg 18w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/> <\/p>\n<h3>V\u00f9ng Fresnel Quan Tr\u1ecdng<\/h3>\n<p>Ch\u1ec9 c\u1ea7n c\u00f3 t\u1ea7m nh\u00ecn r\u00f5 r\u00e0ng tr\u1ef1c ti\u1ebfp l\u00e0 ch\u01b0a \u0111\u1ee7 \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u. Kh\u00f4ng gian ngay xung quanh \u0111\u01b0\u1eddng truy\u1ec1n tr\u1ef1c ti\u1ebfp c\u0169ng ph\u1ea3i ph\u1ea7n l\u1edbn kh\u00f4ng b\u1ecb c\u1ea3n tr\u1edf. Khu v\u1ef1c n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 V\u00f9ng Fresnel.<\/p>\n<ul>\n<li>Fresnel Zone l\u00e0 g\u00ec?: H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t v\u00f9ng h\u00ecnh elip, d\u1ea1ng x\u00ec g\u00e0 k\u00e9o d\u00e0i gi\u1eefa c\u00e1c anten truy\u1ec1n v\u00e0 nh\u1eadn. \u0110\u00e2y l\u00e0 V\u00f9ng Fresnel \u0111\u1ea7u ti\u00ean. M\u1ed9t ph\u1ea7n l\u1edbn n\u0103ng l\u01b0\u1ee3ng c\u1ee7a t\u00edn hi\u1ec7u di chuy\u1ec3n trong v\u00f9ng n\u00e0y, kh\u00f4ng ch\u1ec9 d\u1ecdc theo \u0111\u01b0\u1eddng trung t\u00e2m tr\u1ef1c ti\u1ebfp.<\/li>\n<li>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng: Nh\u1eefng v\u1eadt c\u1ea3n kh\u00f4ng ch\u1eafn \u0111\u01b0\u1eddng th\u1eb3ng t\u1ea7m nh\u00ecn tr\u1ef1c ti\u1ebfp nh\u01b0ng l\u1ea1i nh\u00f4 v\u00e0o V\u00f9ng Fresnel v\u1eabn c\u00f3 th\u1ec3 g\u00e2y suy gi\u1ea3m t\u00edn hi\u1ec7u \u0111\u00e1ng k\u1ec3. Khi t\u00edn hi\u1ec7u b\u1ecb kh\u00fac x\u1ea1 quanh m\u00e9p c\u1ee7a v\u1eadt th\u1ec3, n\u00f3 tr\u1ea3i qua s\u1ef1 d\u1ecbch pha. T\u00edn hi\u1ec7u kh\u00fac x\u1ea1 sau \u0111\u00f3 g\u00e2y nhi\u1ec5u lo\u1ea1n v\u1edbi t\u00edn hi\u1ec7u tr\u1ef1c ti\u1ebfp t\u1ea1i b\u1ed9 thu, l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u t\u1ed5ng th\u1ec3. M\u1ed9t quy t\u1eafc ph\u1ed5 bi\u1ebfn l\u00e0 V\u00f9ng Fresnel \u0111\u1ea7u ti\u00ean n\u00ean \u00edt nh\u1ea5t c\u00e1ch 60% v\u1eadt c\u1ea3n \u0111\u1ec3 gi\u1ea3m thi\u1ec3u m\u1ea5t m\u00e1t t\u00edn hi\u1ec7u.<\/li>\n<li><a href=\"https:\/\/productionscrews.com\/vi\/essential-guide-to-high-strength-bolts-application-from-theory-to-practice\/\"  data-wpil-monitor-id=\"456\" target=\"_blank\">\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf<\/a>Trong khi c\u00e1c ph\u00e9p t\u00ednh ch\u00ednh x\u00e1c c\u00f3 th\u1ec3 ph\u1ee9c t\u1ea1p, m\u1ed9t c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n gi\u00fap \u01b0\u1edbc l\u01b0\u1ee3ng b\u00e1n k\u00ednh c\u1ee7a V\u00f9ng Fresnel t\u1ea1i \u0111i\u1ec3m r\u1ed9ng nh\u1ea5t (\u1edf gi\u1eefa hai anten). \u0110\u1ed1i v\u1edbi kh\u1ea3o s\u00e1t th\u1ef1c t\u1ebf, vi\u1ec7c hi\u1ec3u kh\u00e1i ni\u1ec7m n\u00e0y quan tr\u1ecdng h\u01a1n nhi\u1ec1u so v\u1edbi t\u00ednh to\u00e1n ch\u00ednh x\u00e1c. V\u00ed d\u1ee5, m\u1ed9t anten tr\u00ean m\u00e1i nh\u00e0 h\u01b0\u1edbng v\u1ec1 ph\u00eda th\u00e1p c\u00e1ch \u0111\u00f3 v\u00e0i d\u1eb7m c\u00f3 th\u1ec3 c\u00f3 \u0111\u01b0\u1eddng truy\u1ec1n r\u00f5 r\u00e0ng, nh\u01b0ng n\u1ebfu \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u ch\u1ec9 l\u01b0\u1edbt qua m\u00e1i c\u1ee7a m\u1ed9t t\u00f2a nh\u00e0 g\u1ea7n \u0111\u00f3 ho\u1eb7c m\u1ed9t h\u00e0ng c\u00e2y r\u1eadm r\u1ea1p, V\u00f9ng Fresnel b\u1ecb c\u1ea3n tr\u1edf, v\u00e0 hi\u1ec7u su\u1ea5t s\u1ebd gi\u1ea3m. N\u00e2ng anten l\u00ean ch\u1ec9 v\u00e0i feet n\u1eefa \u0111\u1ec3 v\u01b0\u1ee3t qua v\u1eadt c\u1ea3n n\u00e0y c\u00f3 th\u1ec3 mang l\u1ea1i s\u1ef1 c\u1ea3i thi\u1ec7n r\u00f5 r\u1ec7t.<\/li>\n<\/ul>\n<h3>\u0110\u1ecbnh h\u01b0\u1edbng v\u00e0 ph\u00e2n c\u1ef1c c\u1ee7a Anten<\/h3>\n<p>S\u1ef1 ph\u00e2n c\u1ef1c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn h\u01b0\u1edbng c\u1ee7a tr\u01b0\u1eddng \u0111i\u1ec7n c\u1ee7a s\u00f3ng v\u00f4 tuy\u1ebfn. \u0110\u1ec3 truy\u1ec1n t\u00edn hi\u1ec7u t\u1ed1i \u0111a, anten thu ph\u1ea3i c\u00f9ng h\u01b0\u1edbng ph\u00e2n c\u1ef1c v\u1edbi anten ph\u00e1t.<\/p>\n<ul>\n<li>Ph\u00e2n c\u1ef1c d\u1ecdc so v\u1edbi ph\u00e2n c\u1ef1c ngang: Trong ph\u00e2n c\u1ef1c ngang, tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb song song v\u1edbi b\u1ec1 m\u1eb7t Tr\u00e1i \u0111\u1ea5t. \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n cho h\u1ea7u h\u1ebft c\u00e1c ph\u00e1t s\u00f3ng radio FM v\u00e0 truy\u1ec1n h\u00ecnh k\u1ef9 thu\u1eadt s\u1ed1. Trong ph\u00e2n c\u1ef1c d\u1ecdc, tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb vu\u00f4ng g\u00f3c v\u1edbi b\u1ec1 m\u1eb7t Tr\u00e1i \u0111\u1ea5t, ph\u1ed5 bi\u1ebfn cho \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng <a href=\"https:\/\/productionscrews.com\/vi\/essential-guide-to-rf-modules-demystifying-radio-communication-components\/\"  data-wpil-monitor-id=\"459\" target=\"_blank\">truy\u1ec1n th\u00f4ng v\u00e0 radio di \u0111\u1ed9ng tr\u00ean \u0111\u1ea5t li\u1ec1n<\/a>.<\/li>\n<li>L\u1eafp \u0111\u1eb7t \u0111\u1ec3 \u0110\u00fang Polarization: Ph\u1ea7n c\u1ee9ng l\u1eafp \u0111\u1eb7t ph\u1ea3i cho ph\u00e9p antenn\u0103 \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh \u0111\u00fang h\u01b0\u1edbng. \u0110\u1ed1i v\u1edbi antenn\u0103 truy\u1ec1n h\u00ecnh ki\u1ec3u Yagi-Uda \u0111i\u1ec3n h\u00ecnh, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00e1c ph\u1ea7n t\u1eed (c\u00e1c thanh ch\u00e9o) ph\u1ea3i n\u1eb1m ngang ho\u00e0n h\u1ea3o. N\u1ebfu gi\u00e1 \u0111\u1ee1 b\u1ecb v\u00f5ng ho\u1eb7c xo\u1eafn theo th\u1eddi gian, l\u00e0m thay \u0111\u1ed5i polarization, c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u s\u1ebd gi\u1ea3m \u0111\u00e1ng k\u1ec3.<\/li>\n<li>Ph\u00e9p c\u1ef1c quang tr\u00f2n: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng cho truy\u1ec1n th\u00f4ng v\u1ec7 tinh (v\u00ed d\u1ee5: GPS, radio v\u1ec7 tinh) v\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng \u0111\u1eb7c bi\u1ec7t kh\u00e1c, ph\u00e9p c\u1ef1c quang tr\u00f2n li\u00ean quan \u0111\u1ebfn tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb quay khi truy\u1ec1n s\u00f3ng. M\u1ed9t l\u1ee3i th\u1ebf ch\u00ednh l\u00e0 n\u00f3 \u00edt nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi h\u01b0\u1edbng c\u1ee7a anten, l\u00e0m cho n\u00f3 b\u1ec1n v\u1eefng h\u01a1n cho c\u00e1c li\u00ean k\u1ebft di \u0111\u1ed9ng v\u00e0 v\u1ec7 tinh n\u01a1i m\u00e0 h\u01b0\u1edbng c\u1ee7a b\u1ed9 thu c\u00f3 th\u1ec3 thay \u0111\u1ed5i.<\/li>\n<\/ul>\n<p>&#8212;<\/p>\n<h2>Thi\u1ebft k\u1ebf gi\u00e1 \u0111\u1ee1 an to\u00e0n v\u00e0 \u1ed5n \u0111\u1ecbnh<\/h2>\n<p>Vi\u1ec7c l\u1eafp \u0111\u1eb7t anten l\u00e0 m\u1ed9t c\u1ea5u tr\u00fac c\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ecbu \u0111\u1ef1ng c\u00e1c l\u1ef1c v\u1eadt l\u00fd \u0111\u00e1ng k\u1ec3. Vi\u1ec7c kh\u00f4ng tu\u00e2n th\u1ee7 c\u00e1c l\u1ef1c n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn thi\u1ec7t h\u1ea1i t\u00e0i s\u1ea3n, m\u1ea5t thi\u1ebft b\u1ecb v\u00e0 c\u00e1c nguy hi\u1ec3m v\u1ec1 an to\u00e0n nghi\u00eam tr\u1ecdng.<\/p>\n<h3>Hi\u1ec3u v\u1ec1 T\u1ea3i tr\u1ecdng Gi\u00f3<\/h3>\n<p>L\u1ef1c t\u00e1c \u0111\u1ed9ng l\u1edbn nh\u1ea5t l\u00ean vi\u1ec7c l\u1eafp \u0111\u1eb7t anten l\u00e0 gi\u00f3. L\u1ef1c n\u00e0y mang t\u00ednh \u0111\u1ed9ng, bi\u1ebfn \u0111\u1ed5i v\u00e0 c\u00f3 th\u1ec3 r\u1ea5t l\u1edbn trong c\u01a1n b\u00e3o.<\/p>\n<ul>\n<li>T\u1ea3i tr\u1ecdng t\u0129nh so v\u1edbi t\u1ea3i tr\u1ecdng \u0111\u1ed9ng: T\u1ea3i tr\u1ecdng t\u0129nh l\u00e0 l\u1ef1c li\u00ean t\u1ee5c, h\u01b0\u1edbng xu\u1ed1ng c\u1ee7a tr\u1ecdng l\u01b0\u1ee3ng anten v\u00e0 c\u1ed9t anten. N\u00f3 t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf v\u00e0 d\u1ec5 qu\u1ea3n l\u00fd. T\u1ea3i tr\u1ecdng \u0111\u1ed9ng l\u00e0 l\u1ef1c do gi\u00f3 g\u00e2y ra, l\u1edbn h\u01a1n nhi\u1ec1u v\u00e0 t\u00e1c \u0111\u1ed9ng theo chi\u1ec1u ngang.<\/li>\n<li>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn T\u1ea3i tr\u1ecdng Gi\u00f3:<\/li>\n<li>Di\u1ec7n t\u00edch &amp; H\u00ecnh d\u1ea1ng b\u1ec1 m\u1eb7t Anten: Y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t l\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a anten ti\u1ebfp x\u00fac v\u1edbi gi\u00f3. M\u1ed9t anten h\u00ecnh ch\u1ea3o l\u1edbn, r\u1eafn ch\u1eafc s\u1ebd ch\u1ecbu l\u1ef1c l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi anten d\u1ea1ng l\u01b0\u1edbi ho\u1eb7c d\u1ea1ng khung c\u1ee7a c\u00f9ng k\u00edch th\u01b0\u1edbc.<\/li>\n<li>Chi\u1ec1u cao c\u1ed9t v\u00e0 Kho\u1ea3ng c\u00e1ch M\u00f4-men: M\u1ed9t c\u1ed9t cao ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t chi\u1ebfc \u0111\u00f2n b\u1ea9y, ho\u1eb7c kho\u1ea3ng c\u00e1ch m\u00f4-men. \u0110i\u1ec1u n\u00e0y nh\u00e2n m\u1ea1nh l\u1ef1c c\u1ee7a gi\u00f3 t\u00e1c \u0111\u1ed9ng l\u00ean anten v\u00e0 truy\u1ec1n t\u1ea3i \u0111\u1ebfn c\u00e1c gi\u00e1 \u0111\u1ee1 v\u00e0 c\u1ea5u tr\u00fac. V\u00ed d\u1ee5, t\u0103ng g\u1ea5p \u0111\u00f4i chi\u1ec1u cao c\u1ed9t, s\u1ebd l\u00e0m t\u0103ng g\u1ea5p \u0111\u00f4i l\u1ef1c \u0111\u00f2n b\u1ea9y v\u00e0 do \u0111\u00f3 t\u0103ng \u00e1p l\u1ef1c l\u00ean ch\u00e2n \u0111\u1ebf c\u1ee7a gi\u00e1 \u0111\u1ee1.<\/li>\n<li>T\u1ed1c \u0111\u1ed9 Gi\u00f3: L\u1ef1c t\u00e1c \u0111\u1ed9ng c\u1ee7a gi\u00f3 kh\u00f4ng tuy\u1ebfn t\u00ednh; n\u00f3 t\u0103ng theo b\u00ecnh ph\u01b0\u01a1ng c\u1ee7a t\u1ed1c \u0111\u1ed9 gi\u00f3. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t c\u01a1n gi\u00f3 m\u1ea1nh t\u1eeb 50 mph \u0111\u1ebfn 100 mph kh\u00f4ng ch\u1ec9 g\u1ea5p \u0111\u00f4i l\u1ef1c m\u00e0 c\u00f2n t\u0103ng g\u1ea5p b\u1ed1n l\u1ea7n.<\/li>\n<li>Ti\u00eau chu\u1ea9n Ng\u00e0nh: \u0110\u1ed1i v\u1edbi c\u00e1c l\u1eafp \u0111\u1eb7t quan tr\u1ecdng v\u00e0 th\u01b0\u01a1ng m\u1ea1i, c\u00e1c k\u1ef9 s\u01b0 tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 TIA-222 (hi\u1ec7n \u0111ang \u1edf phi\u00ean b\u1ea3n \u2018H\u2019). Ti\u00eau chu\u1ea9n n\u00e0y cung c\u1ea5p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p chi ti\u1ebft \u0111\u1ec3 t\u00ednh to\u00e1n t\u1ea3i tr\u1ecdng gi\u00f3 v\u00e0 b\u0103ng tr\u00ean c\u00e1c c\u1ea5u tr\u00fac h\u1ed7 tr\u1ee3 anten, \u0111\u1ea3m b\u1ea3o ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 an to\u00e0n ph\u00f9 h\u1ee3p.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-6564584.jpg\" height=\"853\" width=\"1280\" class=\"alignnone size-full wp-image-2640\" alt=\"Antenna v\u00e0 \u0111\u0129a v\u1ec7 tinh d\u00f9ng cho truy\u1ec1n d\u1eef li\u1ec7u t\u1ea7n s\u1ed1 cao v\u00e0 h\u1ea1 t\u1ea7ng truy\u1ec1n th\u00f4ng.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-6564584.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-6564584-300x200.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-6564584-768x512.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-6564584-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/> <\/p>\n<h3>B\u1ea3ng 1: \u01af\u1edbc l\u01b0\u1ee3ng T\u1ea3i tr\u1ecdng Gi\u00f3 \u0110\u01a1n gi\u1ea3n<\/h3>\n<p>\u0110\u1ec3 minh h\u1ecda c\u00e1c l\u1ef1c m\u1ea1nh \u0111ang t\u00e1c \u0111\u1ed9ng, b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y cung c\u1ea5p \u01b0\u1edbc l\u01b0\u1ee3ng \u0111\u01a1n gi\u1ea3n v\u1ec1 l\u1ef1c ngang t\u00e1c \u0111\u1ed9ng l\u00ean anten. \u0110\u00e2y ch\u1ec9 d\u00e0nh cho m\u1ee5c \u0111\u00edch gi\u00e1o d\u1ee5c v\u00e0 kh\u00f4ng thay th\u1ebf ph\u00e2n t\u00edch c\u1ea5u tr\u00fac chuy\u00ean nghi\u1ec7p cho c\u00e1c l\u1eafp \u0111\u1eb7t l\u1edbn ho\u1eb7c quan tr\u1ecdng.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"192\">Di\u1ec7n t\u00edch B\u1ec1 m\u1eb7t Anten<\/td>\n<td width=\"192\">T\u1ed1c \u0111\u1ed9 Gi\u00f3 (mph)<\/td>\n<td width=\"192\">L\u1ef1c \u01af\u1edbc t\u00ednh t\u00e1c \u0111\u1ed9ng l\u00ean Gi\u00e1 \u0111\u1ee1 (lbs)<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">2 sq ft<\/td>\n<td width=\"192\">60 mph<\/td>\n<td width=\"192\">~18 lbs<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">2 sq ft<\/td>\n<td width=\"192\">90 mph<\/td>\n<td width=\"192\">~41 lbs<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">5 sq ft<\/td>\n<td width=\"192\">60 mph<\/td>\n<td width=\"192\">~46 lbs<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">5 sq ft<\/td>\n<td width=\"192\">90 mph<\/td>\n<td width=\"192\">~103 lbs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>*L\u01b0u \u00fd: L\u1ef1c \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c F = A \u00d7 P \u00d7 Cd, trong \u0111\u00f3 P = 0.00256 \u00d7 V\u00b2, gi\u1ea3 \u0111\u1ecbnh h\u1ec7 s\u1ed1 c\u1ea3n (Cd) l\u00e0 1.2 cho m\u1ed9t t\u1ea5m ph\u1eb3ng. L\u1ef1c th\u1ef1c t\u1ebf s\u1ebd thay \u0111\u1ed5i d\u1ef1a tr\u00ean h\u00ecnh d\u1ea1ng c\u1ee7a \u0103ng-ten, \u0111\u00f3ng b\u0103ng v\u00e0 y\u1ebfu t\u1ed1 gi\u00f3 gi\u1eadt.*<\/p>\n<h3>Ch\u1ecdn Ph\u1ee5 ki\u1ec7n G\u1eafn k\u1ebft c\u1ee7a B\u1ea1n<\/h3>\n<p>C\u00e1c <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-alloy-steel-screws-raw-material-selection-for-maximum-strength\/\"  data-wpil-monitor-id=\"460\" target=\"_blank\">vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u1ee5 ki\u1ec7n g\u1eafn k\u1ebft l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh v\u1ec1 v\u1eadt li\u1ec7u<\/a> khoa h\u1ecdc. V\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ea3m b\u1ea3o r\u1eb1ng vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00f3 \u0111\u1ed9 b\u1ec1n c\u1ea7n thi\u1ebft v\u00e0 s\u1ebd ch\u1ed1ng l\u1ea1i s\u1ef1 xu\u1ed1ng c\u1ea5p c\u1ee7a m\u00f4i tr\u01b0\u1eddng trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a n\u00f3.<\/p>\n<ul>\n<li>C\u00e1c Thu\u1ed9c t\u00ednh Quan tr\u1ecdng:<\/li>\n<li>\u0110\u1ed9 b\u1ec1n k\u00e9o: Kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u ch\u1ed1ng l\u1ea1i vi\u1ec7c b\u1ecb k\u00e9o \u0111\u1ee9t. Th\u00e9p cung c\u1ea5p \u0111\u1ed9 b\u1ec1n k\u00e9o r\u1ea5t cao, l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu t\u1ea3i cao.<\/li>\n<li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n: Kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ec9 s\u00e9t (\u0111\u1ed1i v\u1edbi th\u00e9p) ho\u1eb7c oxy h\u00f3a (\u0111\u1ed1i v\u1edbi nh\u00f4m). \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u1ed5i th\u1ecd, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt, ven bi\u1ec3n ho\u1eb7c c\u00f4ng nghi\u1ec7p c\u00f3 ch\u1ea5t \u00f4 nhi\u1ec5m trong kh\u00f4ng kh\u00ed.<\/li>\n<li>\u0102n m\u00f2n \u0111i\u1ec7n h\u00f3a: \u0110\u00e2y l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng quan tr\u1ecdng v\u00e0 th\u01b0\u1eddng b\u1ecb b\u1ecf qua. Khi hai kim lo\u1ea1i kh\u00e1c nhau ti\u1ebfp x\u00fac \u0111i\u1ec7n trong m\u00f4i tr\u01b0\u1eddng c\u00f3 dung d\u1ecbch \u0111i\u1ec7n ly (nh\u01b0 n\u01b0\u1edbc m\u01b0a), ch\u00fang t\u1ea1o th\u00e0nh m\u1ed9t pin nh\u1ecf. Kim lo\u1ea1i \u201cho\u1ea1t \u0111\u1ed9ng\u201d h\u01a1n s\u1ebd b\u1ecb \u0103n m\u00f2n nhanh h\u01a1n. M\u1ed9t v\u00ed d\u1ee5 ph\u1ed5 bi\u1ebfn l\u00e0 s\u1eed d\u1ee5ng ph\u1ee5 ki\u1ec7n th\u00e9p (nh\u01b0 U-bolt) \u0111\u1ec3 g\u1eafn \u0103ng-ten nh\u00f4m v\u00e0o c\u1ed9t. Th\u00e9p s\u1ebd th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh \u0103n m\u00f2n c\u1ee7a nh\u00f4m t\u1ea1i \u0111i\u1ec3m ti\u1ebfp x\u00fac, cu\u1ed1i c\u00f9ng d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c.<\/li>\n<\/ul>\n<h3>B\u1ea3ng 2: Ph\u00e2n t\u00edch V\u1eadt li\u1ec7u G\u1eafn k\u1ebft<\/h3>\n<p>B\u1ea3ng n\u00e0y cung c\u1ea5p ph\u00e2n t\u00edch so s\u00e1nh c\u00e1c v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn d\u00f9ng cho c\u1ed9t, gi\u00e1 \u0111\u1ee1 v\u00e0 \u1ed1c v\u00edt, gi\u00fap b\u1ea1n \u0111\u01b0a ra l\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean m\u00f4i tr\u01b0\u1eddng v\u00e0 nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a m\u00ecnh.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"96\">V\u1eadt li\u1ec7u<\/td>\n<td width=\"96\">T\u1ec9 l\u1ec7 s\u1ee9c m\u1ea1nh tr\u00ean tr\u1ecdng l\u01b0\u1ee3ng<\/td>\n<td width=\"96\">Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n<\/td>\n<td width=\"96\">R\u1ee7i ro \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a<\/td>\n<td width=\"96\">Chi ph\u00ed<\/td>\n<td width=\"96\">Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng t\u1ed1t nh\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td width=\"96\">Th\u00e9p m\u1ea1 k\u1ebdm<\/td>\n<td width=\"96\">Cao<\/td>\n<td width=\"96\">T\u1ed1t (t\u00f9y thu\u1ed9c v\u00e0o l\u1edbp ph\u1ee7)<\/td>\n<td width=\"96\">Trung b\u00ecnh (v\u1edbi Nh\u00f4m)<\/td>\n<td width=\"96\">Th\u1ea5p<\/td>\n<td width=\"96\">M\u1ee5c \u0111\u00edch chung, nhu c\u1ea7u \u0111\u1ed9 b\u1ec1n cao<\/td>\n<\/tr>\n<tr>\n<td width=\"96\">Nh\u00f4m<\/td>\n<td width=\"96\">Xu\u1ea5t s\u1eafc<\/td>\n<td width=\"96\">R\u1ea5t t\u1ed1t<\/td>\n<td width=\"96\">Th\u1ea5p (khi s\u1eed d\u1ee5ng v\u1edbi ch\u00ednh n\u00f3)<\/td>\n<td width=\"96\">Trung b\u00ecnh<\/td>\n<td width=\"96\">C\u1ed9t nh\u1eb9, khu v\u1ef1c gi\u00f3 th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td width=\"96\"><a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-stainless-steel-bar-selection-prevent-costly-mistakes-failures\/\"  data-wpil-monitor-id=\"455\" target=\"_blank\">Th\u00e9p kh\u00f4ng g\u1ec9<\/a><\/td>\n<td width=\"96\">R\u1ea5t cao<\/td>\n<td width=\"96\">Xu\u1ea5t s\u1eafc<\/td>\n<td width=\"96\">Th\u1ea5p (nh\u01b0ng c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo c\u1ea5p \u0111\u1ed9)<\/td>\n<td width=\"96\">Cao<\/td>\n<td width=\"96\">M\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n \/ \u0103n m\u00f2n, l\u00e2u d\u00e0i<\/td>\n<\/tr>\n<tr>\n<td width=\"96\">Th\u00e9p s\u01a1n t\u0129nh \u0111i\u1ec7n<\/td>\n<td width=\"96\">Cao<\/td>\n<td width=\"96\">Thay \u0111\u1ed5i (k\u00e9m n\u1ebfu b\u1ecb tr\u1ea7y x\u01b0\u1edbc)<\/td>\n<td width=\"96\">Cao (n\u1ebfu l\u1edbp ph\u1ee7 b\u1ecb ph\u00e1 v\u1ee1)<\/td>\n<td width=\"96\">Th\u1ea5p-Trung b\u00ecnh<\/td>\n<td width=\"96\">T\u1eadp trung v\u00e0o th\u1ea9m m\u1ef9, kh\u00ed h\u1eadu kh\u00f4ng kh\u1eafc nghi\u1ec7t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&#8212;<\/p>\n<h2>Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 EMC v\u00e0 L\u1eafp \u0111\u1eb7t<\/h2>\n<p>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC) trong b\u1ed1i c\u1ea3nh n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng g\u1eafn v\u00e0 m\u00f4i tr\u01b0\u1eddng xung quanh kh\u00f4ng g\u00e2y nhi\u1ec5u cho ch\u1ee9c n\u0103ng c\u1ee7a \u0103ng-ten. Gi\u00e1 \u0111\u1ee1 kh\u00f4ng ch\u1ec9 l\u00e0 b\u1ed9 ph\u1eadn h\u1ed7 tr\u1ee3 th\u1ee5 \u0111\u1ed9ng; n\u00f3 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a m\u00f4i tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb c\u1ee7a \u0103ng-ten.<\/p>\n<h3>Gi\u00e1 \u0111\u1ee1 nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng<\/h3>\n<p>C\u1ed9t ho\u1eb7c gi\u00e1 \u0111\u1ee1 kim lo\u1ea1i, trong \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111\u1ecbnh, c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n kh\u00f4ng ch\u1ee7 \u00fd c\u1ee7a ch\u00ednh \u0103ng-ten, l\u00e0m thay \u0111\u1ed5i hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3.<\/p>\n<ul>\n<li>Gi\u00e1 \u0111\u1ee1 d\u1eabn \u0111i\u1ec7n so v\u1edbi kh\u00f4ng d\u1eabn \u0111i\u1ec7n: M\u1ed9t gi\u00e1 \u0111\u1ee1 kim lo\u1ea1i trong tr\u01b0\u1eddng g\u1ea7n c\u1ee7a \u0103ng-ten c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t th\u00e0nh ph\u1ea7n k\u00fd sinh. T\u00f9y thu\u1ed9c v\u00e0o k\u00edch th\u01b0\u1edbc v\u00e0 kho\u1ea3ng c\u00e1ch, n\u00f3 c\u00f3 th\u1ec3 ph\u1ea3n x\u1ea1 ho\u1eb7c t\u00e1i ph\u00e1t RF, t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u1eabu b\u1ee9c x\u1ea1 d\u1ef1 \u0111\u1ecbnh c\u1ee7a \u0103ng-ten.<\/li>\n<li>Hi\u1ec7u \u1ee9ng \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1: Khi m\u1ed9t v\u1eadt kim lo\u1ea1i l\u1edbn \u0111\u01b0\u1ee3c \u0111\u1eb7t qu\u00e1 g\u1ea7n c\u00e1c ph\u1ea7n t\u1eed ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0103ng-ten, n\u00f3 c\u00f3 th\u1ec3 c\u1ed9ng h\u01b0\u1edfng v\u1edbi tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb c\u1ee7a \u0103ng-ten. S\u1ef1 c\u1ed9ng h\u01b0\u1edfng n\u00e0y c\u00f3 th\u1ec3 l\u00e0m d\u1ecbch chuy\u1ec3n t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng c\u1ee7a \u0103ng-ten v\u00e0 thay \u0111\u1ed5i tr\u1edf kh\u00e1ng c\u1ee7a n\u00f3. K\u1ebft qu\u1ea3 l\u00e0 m\u1ed9t s\u1ef1 ph\u00f9 h\u1ee3p tr\u1edf kh\u00e1ng k\u00e9m v\u1edbi c\u00e1p \u0111\u1ed3ng tr\u1ee5c, d\u1eabn \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u00f3ng \u0111\u1ee9ng (SWR) cao v\u00e0 m\u1ea5t t\u00edn hi\u1ec7u \u0111\u00e1ng k\u1ec3.<\/li>\n<li>Nguy\u00ean t\u1eafc chung v\u1ec1 kho\u1ea3ng c\u00e1ch c\u00e1ch ly: \u0110\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c t\u01b0\u01a1ng t\u00e1c kh\u00f4ng mong mu\u1ed1n n\u00e0y, gi\u1eef kho\u1ea3ng c\u00e1ch c\u00e0ng xa c\u00e0ng t\u1ed1t gi\u1eefa c\u00e1c ph\u1ea7n t\u1eed ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0103ng-ten v\u00e0 b\u1ea5t k\u1ef3 b\u1ec1 m\u1eb7t kim lo\u1ea1i song song l\u1edbn n\u00e0o (nh\u01b0 \u1ed1ng kh\u00f3i kim lo\u1ea1i, c\u1ed9t kh\u00e1c ho\u1eb7c v\u00e1ch kim lo\u1ea1i). H\u01b0\u1edbng d\u1eabn chung l\u00e0 duy tr\u00ec kho\u1ea3ng c\u00e1ch c\u00e1ch ly \u00edt nh\u1ea5t b\u1eb1ng m\u1ed9t n\u1eeda b\u01b0\u1edbc s\u00f3ng c\u1ee7a t\u1ea7n s\u1ed1 th\u1ea5p nh\u1ea5t ho\u1ea1t \u0111\u1ed9ng. \u0110\u1ed1i v\u1edbi b\u0103ng t\u1ea7n UHF TV, \u0111i\u1ec1u n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng kho\u1ea3ng 1-2 feet.<\/li>\n<\/ul>\n<h3>C\u00e1p v\u00e0 k\u1ebft n\u1ed1i<\/h3>\n<p>C\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u00e0 c\u00e1c k\u1ebft n\u1ed1i c\u1ee7a n\u00f3 l\u00e0 li\u00ean k\u1ebft cu\u1ed1i c\u00f9ng trong chu\u1ed7i. L\u1ef1a ch\u1ecdn k\u00e9m ho\u1eb7c l\u1eafp \u0111\u1eb7t c\u1ea9u th\u1ea3 \u1edf \u0111\u00e2y c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t t\u00e1c d\u1ee5ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00f4ng s\u1ee9c \u0111\u1eb7t \u0103ng-ten \u0111\u00fang v\u1ecb tr\u00ed.<\/p>\n<ul>\n<li>Ch\u1ea5t l\u01b0\u1ee3ng c\u00e1p \u0111\u1ed3ng tr\u1ee5c: T\u00edn hi\u1ec7u truy\u1ec1n t\u1eeb \u0103ng-ten \u0111\u1ebfn b\u1ed9 thu y\u1ebfu v\u00e0 d\u1ec5 b\u1ecb m\u1ea5t m\u00e1t. S\u1eed d\u1ee5ng c\u00e1p \u0111\u1ed3ng tr\u1ee5c ch\u1ea5t l\u01b0\u1ee3ng cao, \u00edt m\u1ea5t m\u00e1t l\u00e0 m\u1ed9t kho\u1ea3n \u0111\u1ea7u t\u01b0 quan tr\u1ecdng. \u0110\u1ed1i v\u1edbi TV v\u00e0 ti\u1ebfp nh\u1eadn chung, RG6 Quad-Shield l\u00e0 ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn. \u0110\u1ed1i v\u1edbi c\u00e1c \u0111o\u1ea1n c\u00e1p d\u00e0i ho\u1eb7c t\u1ea7n s\u1ed1 cao h\u01a1n (nh\u01b0 trong radio HAM), c\u00e1c lo\u1ea1i c\u00e1p nh\u01b0 LMR-400 cung c\u1ea5p m\u1ee9c gi\u1ea3m t\u00edn hi\u1ec7u th\u1ea5p h\u01a1n \u0111\u00e1ng k\u1ec3 tr\u00ean m\u1ed7i feet.<\/li>\n<li>V\u00f2ng nh\u1ecf gi\u1ecdt: \u0110\u00e2y l\u00e0 m\u1ed9t chi ti\u1ebft \u0111\u01a1n gi\u1ea3n nh\u01b0ng quan tr\u1ecdng. Tr\u01b0\u1edbc khi c\u00e1p v\u00e0o nh\u00e0 ho\u1eb7c k\u1ebft n\u1ed1i v\u1edbi kh\u1ed1i \u0111\u1ea5t, n\u00f3 n\u00ean \u0111\u01b0\u1ee3c v\u00f2ng xu\u1ed1ng d\u01b0\u1edbi m\u1ee9c \u0111i\u1ec3m v\u00e0o. \u0110i\u1ec1u n\u00e0y t\u1ea1o th\u00e0nh m\u1ed9t \u201cv\u00f2ng nh\u1ecf gi\u1ecdt,\u201d s\u1eed d\u1ee5ng tr\u1ecdng l\u1ef1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o n\u01b0\u1edbc m\u01b0a ch\u1ea3y xu\u1ed1ng c\u00e1p nh\u1ecf gi\u1ecdt r\u01a1i ra ngo\u00e0i thay v\u00ec th\u1ea5m tr\u1ef1c ti\u1ebfp v\u00e0o k\u1ebft n\u1ed1i ho\u1eb7c l\u1ed7 xuy\u00ean t\u01b0\u1eddng.<\/li>\n<li>Ch\u1ed1ng th\u1ea5m cho c\u00e1c k\u1ebft n\u1ed1i: M\u1ed1i n\u1ed1i gi\u1eefa \u0103ng-ten v\u00e0 c\u00e1p \u0111\u1ed3ng tr\u1ee5c l\u00e0 \u0111i\u1ec3m d\u1ec5 b\u1ecb t\u1ed5n th\u01b0\u01a1ng nh\u1ea5t trong to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng ngo\u00e0i tr\u1eddi. S\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a \u0111\u1ed9 \u1ea9m s\u1ebd g\u00e2y \u0103n m\u00f2n k\u1ebft n\u1ed1i, l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u v\u00e0 cu\u1ed1i c\u00f9ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1ecfng ho\u00e0n to\u00e0n. M\u1ed1i n\u1ed1i n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ed1ng th\u1ea5m b\u1eb1ng keo ni\u00eam phong c\u00e1p \u0111\u1ed3ng tr\u1ee5c, m\u1ee1 silicone c\u00e1ch \u0111i\u1ec7n b\u00ean trong k\u1ebft n\u1ed1i, v\u00e0\/ho\u1eb7c b\u1ecdc b\u0103ng cao su t\u1ef1 d\u00ednh (t\u1ef1 d\u00ednh) \u0111\u1ec3 ch\u1ed1ng th\u1ea5m.<\/li>\n<li>L\u1eafp \u0111\u1eb7t c\u00e1p: C\u1ed1 \u0111\u1ecbnh c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u00e0o c\u1ed9t v\u00e0 c\u1ea5u tr\u00fac b\u1eb1ng d\u00e2y bu\u1ed9c ho\u1eb7c k\u1eb9p ch\u1ed1ng tia UV. Tr\u00e1nh c\u00e1c \u0111o\u1ea1n g\u1ea5p kh\u00fac s\u1eafc n\u00e9t, v\u00ec ch\u00fang c\u00f3 th\u1ec3 thay \u0111\u1ed5i tr\u1edf kh\u00e1ng c\u1ee7a c\u00e1p v\u00e0 g\u00e2y ph\u1ea3n x\u1ea1 t\u00edn hi\u1ec7u. Ngo\u00e0i ra, tr\u00e1nh k\u00e9o d\u00e2y bu\u1ed9c qu\u00e1 ch\u1eb7t l\u00e0m bi\u1ebfn d\u1ea1ng l\u1edbp c\u00e1ch \u0111i\u1ec7n c\u1ee7a c\u00e1p, \u0111i\u1ec1u n\u00e0y c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-165479.jpg\" height=\"960\" width=\"1280\" class=\"alignnone size-full wp-image-2639\" alt=\"V\u00f2m \u0111\u00e0i quan s\u00e1t l\u1edbn m\u00e0u tr\u1eafng v\u1edbi c\u00e2y c\u1ed1i xung quanh d\u01b0\u1edbi n\u1ec1n tr\u1eddi xanh trong, d\u00f9ng cho nghi\u00ean c\u1ee9u thi\u00ean v\u0103n v\u00e0 ch\u1ee9a k\u00ednh thi\u00ean v\u0103n.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-165479.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-165479-300x225.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-165479-768x576.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-165479-16x12.jpg 16w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/> <\/p>\n<h2>Ch\u1ed1ng \u0111\u1ea5t, li\u00ean k\u1ebft v\u00e0 an to\u00e0n<\/h2>\n<p>Vi\u1ec7c n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch cho m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t anten ngo\u00e0i tr\u1eddi kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t b\u01b0\u1edbc t\u00f9y ch\u1ecdn; \u0111\u00f3 l\u00e0 m\u1ed9t y\u00eau c\u1ea7u an to\u00e0n kh\u00f4ng th\u1ec3 th\u01b0\u01a1ng l\u01b0\u1ee3ng. N\u00f3 b\u1ea3o v\u1ec7 ng\u00f4i nh\u00e0, thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed v\u00e0 c\u01b0 d\u00e2n kh\u1ecfi c\u00e1c nguy hi\u1ec3m c\u1ee7a s\u00e9t v\u00e0 ph\u00f3ng \u0111i\u1ec7n t\u0129nh. T\u1ea5t c\u1ea3 c\u00f4ng vi\u1ec7c n\u1ed1i \u0111\u1ea5t n\u00ean tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh \u0111i\u1ec7n l\u1ef1c \u0111\u1ecba ph\u01b0\u01a1ng, ch\u1eb3ng h\u1ea1n nh\u01b0 Quy chu\u1ea9n \u0110i\u1ec7n Qu\u1ed1c gia (NEC) t\u1ea1i Vi\u1ec7t Nam.<\/p>\n<h3>T\u1ea1i sao N\u1ed1i \u0111\u1ea5t Kh\u00f4ng ph\u1ea3i l\u00e0 T\u00f9y ch\u1ecdn<\/h3>\n<p>M\u1ee5c \u0111\u00edch c\u1ee7a h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t anten th\u01b0\u1eddng b\u1ecb hi\u1ec3u sai. Ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3 l\u00e0 hai m\u1eb7t: b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t v\u00e0 ti\u00eau t\u0129nh \u0111i\u1ec7n.<\/p>\n<ul>\n<li>B\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t: M\u1ed9t h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t kh\u00f4ng ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c s\u00e9t \u0111\u00e1nh. Kh\u00f4ng c\u00f3 g\u00ec c\u00f3 th\u1ec3. Thay v\u00e0o \u0111\u00f3, m\u1ee5c \u0111\u00edch c\u1ee7a n\u00f3 l\u00e0 cung c\u1ea5p m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn chuy\u00ean d\u1ee5ng, c\u00f3 tr\u1edf kh\u00e1ng th\u1ea5p cho d\u00f2ng \u0111i\u1ec7n kh\u1ed5ng l\u1ed3 c\u1ee7a s\u00e9t \u0111\u00e1nh \u0111\u1ec3 \u0111i an to\u00e0n xu\u1ed1ng \u0111\u1ea5t. N\u1ebfu kh\u00f4ng c\u00f3 \u0111\u01b0\u1eddng d\u1eabn n\u00e0y, d\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 ch\u1ecdn \u0111i qua h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n c\u1ee7a ng\u00f4i nh\u00e0, h\u1ec7 th\u1ed1ng \u1ed1ng n\u01b0\u1edbc ho\u1eb7c c\u00e1c b\u1ed9 ph\u1eadn c\u1ea5u tr\u00fac, c\u00f3 th\u1ec3 g\u00e2y ch\u00e1y, n\u1ed5 v\u00e0 thi\u1ec7t h\u1ea1i th\u1ea3m kh\u1ed1c.<\/li>\n<li>T\u00edch t\u1ee5 t\u0129nh \u0111i\u1ec7n: Gi\u00f3 v\u00e0 m\u01b0a di chuy\u1ec3n qua anten c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n t\u00edch t\u0129nh \u0111\u00e1ng k\u1ec3. N\u1ebfu \u0111i\u1ec7n t\u00edch n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c x\u1ea3 an to\u00e0n xu\u1ed1ng \u0111\u1ea5t, n\u00f3 c\u00f3 th\u1ec3 t\u00edch t\u1ee5 v\u00e0 ph\u00f3ng qua c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u00e0o b\u1ed9 ch\u1ec9nh t\u1ea7n s\u1ed1 ph\u00eda tr\u01b0\u1edbc c\u1ee7a TV ho\u1eb7c radio, g\u00e2y h\u01b0 h\u1ecfng v\u0129nh vi\u1ec5n. M\u1ed9t h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t ph\u00f9 h\u1ee3p cung c\u1ea5p m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn li\u00ean t\u1ee5c \u0111\u1ec3 ti\u00eau t\u00e1n t\u0129nh \u0111i\u1ec7n n\u00e0y m\u1ed9t c\u00e1ch v\u00f4 h\u1ea1i.<\/li>\n<\/ul>\n<h3>C\u00e1c th\u00e0nh ph\u1ea7n N\u1ed1i \u0111\u1ea5t c\u1ed1t l\u00f5i<\/h3>\n<p>M\u1ed9t h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t ho\u00e0n ch\u1ec9nh, theo c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 \u0110i\u1ec1u 810 c\u1ee7a NEC, bao g\u1ed3m m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn li\u00ean t\u1ee5c t\u1eeb anten \u0111\u1ebfn \u0111\u1ea5t.<\/p>\n<ol>\n<li>N\u1ed1i \u0111\u1ea5t c\u1ed9t anten: C\u1ed9t kim lo\u1ea1i ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi d\u00e2y n\u1ed1i \u0111\u1ea5t b\u1eb1ng k\u1eb9p n\u1ed1i \u0111\u1ea5t ph\u00f9 h\u1ee3p.<\/li>\n<li>Kh\u1ed1i N\u1ed1i \u0111\u1ea5t: Tr\u01b0\u1edbc khi c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u00e0o nh\u00e0, n\u00f3 ph\u1ea3i b\u1ecb gi\u00e1n \u0111o\u1ea1n b\u1edfi m\u1ed9t thi\u1ebft b\u1ecb x\u1ea3 \u0111\u1ea5t anten ho\u1eb7c kh\u1ed1i n\u1ed1i \u0111\u1ea5t. Thi\u1ebft b\u1ecb n\u00e0y cho ph\u00e9p t\u00edn hi\u1ec7u \u0111\u1ed3ng tr\u1ee5c \u0111i qua trong khi k\u1ebft n\u1ed1i l\u1edbp v\u1ecf ngo\u00e0i c\u1ee7a c\u00e1p v\u1edbi h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t.<\/li>\n<li>D\u00e2y N\u1ed1i \u0111\u1ea5t: M\u1ed9t d\u00e2y \u0111\u1ed3ng ho\u1eb7c nh\u00f4m c\u00f3 ti\u1ebft di\u1ec7n l\u1edbn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m d\u00e2y n\u1ed1i \u0111\u1ea5t ch\u00ednh. N\u00f3 ph\u1ea3i \u0111i theo \u0111\u01b0\u1eddng th\u1eb3ng v\u00e0 ng\u1eafn nh\u1ea5t c\u00f3 th\u1ec3 t\u1eeb c\u1ed9t anten v\u00e0 kh\u1ed1i n\u1ed1i \u0111\u1ea5t xu\u1ed1ng \u0111i\u1ec3m k\u1ebft n\u1ed1i \u0111\u1ea5t.<\/li>\n<li>C\u1ecdc N\u1ed1i \u0111\u1ea5t &amp; Li\u00ean k\u1ebft: D\u00e2y n\u1ed1i \u0111\u1ea5t k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t ho\u1eb7c nhi\u1ec1u c\u1ecdc n\u1ed1i \u0111\u1ea5t chuy\u00ean d\u1ee5ng (th\u01b0\u1eddng l\u00e0 c\u1ecdc d\u00e0i 2.4 m\u00e9t \u0111\u01b0\u1ee3c \u0111\u00f3ng v\u00e0o \u0111\u1ea5t). Quan tr\u1ecdng, h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t anten m\u1edbi n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c li\u00ean k\u1ebft (k\u1ebft n\u1ed1i) v\u1edbi h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t ch\u00ednh c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n c\u1ee7a ng\u00f4i nh\u00e0 b\u1eb1ng m\u1ed9t d\u00e2y li\u00ean k\u1ebft c\u00f3 ti\u1ebft di\u1ec7n l\u1edbn. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec3m n\u1ed1i \u0111\u1ea5t \u1edf c\u00f9ng m\u1ed9t \u0111i\u1ec7n th\u1ebf, ng\u0103n ch\u1eb7n s\u1ef1 ch\u00eanh l\u1ec7ch \u0111i\u1ec7n \u00e1p nguy hi\u1ec3m trong tr\u01b0\u1eddng h\u1ee3p s\u00e9t \u0111\u00e1nh.<\/li>\n<\/ol>\n<h3>B\u1ea3ng 3: Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt N\u1ed1i \u0111\u1ea5t<\/h3>\n<p>B\u1ea3ng n\u00e0y tr\u00ecnh b\u00e0y c\u00e1c th\u00f4ng s\u1ed1 t\u1ed1i thi\u1ec3u c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean t\u1eafc c\u1ee7a Quy chu\u1ea9n \u0110i\u1ec7n Qu\u1ed1c gia (NEC). \u0110\u00e2y ch\u1ec9 \u0111\u1ec3 tham kh\u1ea3o. Lu\u00f4n tham kh\u1ea3o v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh \u0111i\u1ec7n l\u1ef1c \u0111\u1ecba ph\u01b0\u01a1ng c\u1ee7a b\u1ea1n v\u00e0 xem x\u00e9t thu\u00ea m\u1ed9t th\u1ee3 \u0111i\u1ec7n c\u00f3 tr\u00ecnh \u0111\u1ed9 cho c\u00f4ng vi\u1ec7c an to\u00e0n quan tr\u1ecdng n\u00e0y.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"192\">Th\u00e0nh ph\u1ea7n<\/td>\n<td width=\"192\">Th\u00f4ng s\u1ed1 d\u1ef1a tr\u00ean NEC<\/td>\n<td width=\"192\">L\u00fd do<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">D\u00e2y N\u1ed1i \u0111\u1ea5t<\/td>\n<td width=\"192\">T\u1ed1i thi\u1ec3u 10 AWG \u0110\u1ed3ng ho\u1eb7c 8 AWG Nh\u00f4m.<\/td>\n<td width=\"192\">Ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd d\u00f2ng \u0111i\u1ec7n l\u1edbn t\u1eeb s\u00e9t m\u00e0 kh\u00f4ng b\u1ecb bay h\u01a1i.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">D\u00e2y Li\u00ean k\u1ebft<\/td>\n<td width=\"192\">T\u1ed1i thi\u1ec3u 6 AWG \u0110\u1ed3ng.<\/td>\n<td width=\"192\">\u0110\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i \u0111i\u1ec7n tr\u1edf th\u1ea5p gi\u1eefa c\u1ecdc \u0111\u1ea5t c\u1ee7a antenna v\u00e0 \u0111\u1ea5t c\u1ee7a ng\u00f4i nh\u00e0 ch\u00ednh.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">C\u1ecdc \u0111\u1ea5t<\/td>\n<td width=\"192\">Th\u00f4ng th\u01b0\u1eddng d\u00e0i 8 ft., \u0111\u01b0\u1eddng k\u00ednh 5\/8\u2033 b\u1eb1ng th\u00e9p ph\u1ee7 \u0111\u1ed3ng.<\/td>\n<td width=\"192\">Ph\u1ea3i \u0111\u00f3ng s\u00e2u \u0111\u1ee7 \u0111\u1ec3 ch\u1ea1m v\u00e0o \u0111\u1ea5t \u1ea9m \u0111\u1ec3 ph\u00e2n t\u00e1n hi\u1ec7u qu\u1ea3.<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">K\u1eb9p<\/td>\n<td width=\"192\">Ph\u1ea3i \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho ch\u00f4n tr\u1ef1c ti\u1ebfp v\u00e0 s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi.<\/td>\n<td width=\"192\">\u0110\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i b\u1ec1n ch\u1eafc, \u0111i\u1ec7n tr\u1edf th\u1ea5p m\u00e0 kh\u00f4ng b\u1ecb \u0103n m\u00f2n v\u00e0 h\u1ecfng h\u00f3c.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&#8212;<\/p>\n<h2>K\u1ebft lu\u1eadn: T\u1ed5ng h\u1ee3p c\u00e1c Nguy\u00ean t\u1eafc<\/h2>\n<p>L\u1eafp \u0111\u1eb7t antenna ho\u00e0n h\u1ea3o kh\u00f4ng ph\u1ea3i l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a m\u1ed9t h\u00e0nh \u0111\u1ed9ng \u0111\u01a1n l\u1ebb m\u00e0 l\u00e0 s\u1ef1 t\u1ed5ng h\u1ee3p c\u1ee7a m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c th\u1ed1ng nh\u1ea5t. N\u00f3 b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c hi\u1ec3u bi\u1ebft v\u1ec1 v\u1eadt l\u00fd RF \u0111\u1ec3 ch\u1ecdn v\u1ecb tr\u00ed ph\u00f9 h\u1ee3p v\u00e0 k\u1ebft th\u00fac b\u1eb1ng vi\u1ec7c th\u1ef1c hi\u1ec7n c\u1ea9n th\u1eadn c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 \u0111i\u1ec7n. B\u1eb1ng c\u00e1ch v\u01b0\u1ee3t ra ngo\u00e0i c\u00e1c y\u1ebfu t\u1ed1 chi\u1ec1u cao \u0111\u01a1n gi\u1ea3n, ch\u00fang ta c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t mang l\u1ea1i hi\u1ec7u su\u1ea5t t\u00edn hi\u1ec7u t\u1ed1i \u0111a, an to\u00e0n tuy\u1ec7t \u0111\u1ed1i v\u00e0 \u0111\u1ed9 b\u1ec1n l\u00e2u d\u00e0i.<\/p>\n<h3>T\u00f3m t\u1eaft c\u00e1c Nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i<\/h3>\n<ul>\n<li>Hi\u1ec7u su\u1ea5t ph\u1ee5 thu\u1ed9c v\u00e0o v\u1eadt l\u00fd. V\u1ecb tr\u00ed t\u1ed1i \u01b0u \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch \u0111\u01b0\u1eddng nh\u00ecn tr\u1ef1c ti\u1ebfp, \u0111\u1ea3m b\u1ea3o kho\u1ea3ng tr\u1ed1ng c\u1ee7a V\u00f9ng Fresnel, v\u00e0 gi\u1ea3m thi\u1ec3u nhi\u1ec5u \u0111a \u0111\u01b0\u1eddng, \u0111\u1ed3ng th\u1eddi t\u00f4n tr\u1ecdng ph\u00e2n c\u1ef1c c\u1ee7a ph\u00e1t s\u00f3ng.<\/li>\n<li>An to\u00e0n \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o b\u1edfi k\u1ef9 thu\u1eadt. Vi\u1ec7c l\u1eafp \u0111\u1eb7t ph\u1ea3i \u0111\u01b0\u1ee3c xem nh\u01b0 m\u1ed9t c\u1ea5u tr\u00fac, v\u1edbi c\u00e1c gi\u00e1 \u0111\u1ee1 v\u00e0 ph\u1ea7n c\u1ee9ng \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ec3 qu\u1ea3n l\u00fd t\u1ea3i gi\u00f3 t\u00ednh to\u00e1n m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 ng\u0103n ng\u1eeba h\u1ecfng h\u00f3c c\u01a1 h\u1ecdc.<\/li>\n<li>Tu\u1ed5i th\u1ecd \u0111\u1ebfn t\u1eeb s\u1ef1 ch\u00fa \u00fd \u0111\u1ebfn chi ti\u1ebft. \u0110\u1ed9 tin c\u1eady l\u00e2u d\u00e0i c\u1ee7a h\u1ec7 th\u1ed1ng ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c \u00e1p d\u1ee5ng \u0111\u00fang khoa h\u1ecdc v\u1eadt li\u1ec7u, ch\u1ed1ng th\u1eddi ti\u1ebft cho t\u1ea5t c\u1ea3 c\u00e1c k\u1ebft n\u1ed1i, v\u00e0 h\u1ec7 th\u1ed1ng \u0111\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi m\u00e3 ti\u00eau chu\u1ea9n.<\/li>\n<\/ul>\n<h3>Danh s\u00e1ch ki\u1ec3m tra k\u1ef9 thu\u1eadt cu\u1ed1i c\u00f9ng<\/h3>\n<p>Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u b\u1ea5t k\u1ef3 c\u00f4ng vi\u1ec7c l\u1eafp \u0111\u1eb7t n\u00e0o, h\u00e3y ch\u1ea1y qua danh s\u00e1ch ki\u1ec3m tra cu\u1ed1i c\u00f9ng n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt \u0111\u00e3 \u0111\u01b0\u1ee3c xem x\u00e9t.<\/p>\n<ul>\n<li>Kh\u1ea3o s\u00e1t \u0111\u1ecba \u0111i\u1ec3m: B\u1ea1n \u0111\u00e3 ph\u00e2n t\u00edch r\u00f5 \u0111\u01b0\u1eddng nh\u00ecn tr\u1ef1c ti\u1ebfp, \u0111\u1ea3m b\u1ea3o kho\u1ea3ng tr\u1ed1ng c\u1ee7a V\u00f9ng Fresnel, v\u00e0 c\u00e1c ngu\u1ed3n ph\u1ea3n x\u1ea1 \u0111a \u0111\u01b0\u1eddng ti\u1ec1m n\u0103ng ch\u01b0a?<\/li>\n<li>K\u1ebf ho\u1ea1ch c\u1ea5u tr\u00fac: B\u1ea1n \u0111\u00e3 xem x\u00e9t di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a antenna, chi\u1ec1u cao c\u1ed9t, v\u00e0 \u0111i\u1ec1u ki\u1ec7n gi\u00f3 \u0111\u1ecba ph\u01b0\u01a1ng \u0111\u1ec3 ch\u1ecdn gi\u00e1 \u0111\u1ee1 v\u00e0 ph\u1ea7n c\u1ee9ng ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec7m v\u1ee5 ch\u01b0a?<\/li>\n<li>T\u01b0\u01a1ng th\u00edch v\u1eadt li\u1ec7u: C\u00e1c v\u1eadt li\u1ec7u c\u1ee7a c\u1ed9t, gi\u00e1 \u0111\u1ee1, v\u00e0 \u1ed1c v\u00edt b\u1ea1n ch\u1ecdn c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi kh\u00ed h\u1eadu c\u1ee7a b\u1ea1n v\u00e0 t\u01b0\u01a1ng th\u00edch galvanic \u0111\u1ec3 ng\u0103n ng\u1eeba \u0103n m\u00f2n ch\u01b0a?<\/li>\n<li>An to\u00e0n l\u00e0 tr\u00ean h\u1ebft: B\u1ea1n \u0111\u00e3 c\u00f3 k\u1ebf ho\u1ea1ch \u0111\u1ea5t ph\u00f9 h\u1ee3p theo m\u00e3 ti\u00eau chu\u1ea9n \u0111\u1ec3 n\u1ed1i \u0111\u1ea5t c\u1ed9t v\u00e0 li\u00ean k\u1ebft h\u1ec7 th\u1ed1ng v\u1edbi \u0111\u1ea5t \u0111i\u1ec7n c\u1ee7a ng\u00f4i nh\u00e0 ch\u00ednh ch\u01b0a?<\/li>\n<li>K\u1ebf ho\u1ea1ch th\u1ef1c hi\u1ec7n: B\u1ea1n c\u00f3 s\u1eed d\u1ee5ng v\u00f2ng tr\u00f2n nh\u1ecf cho c\u00e1p \u0111\u1ed3ng tr\u1ee5c, ch\u1ed1ng th\u1eddi ti\u1ebft t\u1ea5t c\u1ea3 c\u00e1c k\u1ebft n\u1ed1i ngo\u00e0i tr\u1eddi, v\u00e0 c\u1ed1 \u0111\u1ecbnh t\u1ea5t c\u1ea3 c\u00e1p m\u1ed9t c\u00e1ch ph\u00f9 h\u1ee3p \u0111\u1ec3 tr\u00e1nh h\u1ecfng h\u00f3c kh\u00f4ng?<\/li>\n<\/ul>\n<ul>\n<li class=\"whitespace-normal break-words\">L\u00fd thuy\u1ebft v\u00e0 Thi\u1ebft k\u1ebf Anten \u2013 L\u00fd thuy\u1ebft Anten <a class=\"underline\" href=\"https:\/\/www.antenna-theory.com\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.antenna-theory.com\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n K\u1ef9 thu\u1eadt RF \u2013 IEEE <a class=\"underline\" href=\"https:\/\/www.ieee.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.ieee.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Anten (radio) \u2013 Wikipedia <a class=\"underline\" href=\"https:\/\/en.wikipedia.org\/wiki\/Antenna_(radio)\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Antenna_(radio)<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n Vi\u1ec5n th\u00f4ng \u2013 ITU <a class=\"underline\" href=\"https:\/\/www.itu.int\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.itu.int\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n L\u1eafp \u0111\u1eb7t Anten \u2013 TIA (Hi\u1ec7p h\u1ed9i C\u00f4ng nghi\u1ec7p Vi\u1ec5n th\u00f4ng) <a class=\"underline\" href=\"https:\/\/www.tiaonline.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.tiaonline.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">K\u1ef9 thu\u1eadt RF v\u00e0 Vi s\u00f3ng \u2013 ScienceDirect <a class=\"underline\" href=\"https:\/\/www.sciencedirect.com\/topics\/engineering\/antenna-installation\" target=\"_blank\" rel=\"noopener\">https:\/\/www.sciencedirect.com\/topics\/engineering\/antenna-installation<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n An to\u00e0n \u0110i\u1ec7n \u2013 NFPA (Hi\u1ec7p h\u1ed9i Ph\u00f2ng ch\u00e1y Ch\u1eefa ch\u00e1y Qu\u1ed1c gia) <a class=\"underline\" href=\"https:\/\/www.nfpa.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.nfpa.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n C\u1ea5u tr\u00fac cho C\u1ed9t Anten \u2013 TIA-222 <a class=\"underline\" href=\"https:\/\/www.tiaonline.org\/resources\/standards\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.tiaonline.org\/resources\/standards\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">K\u1ef9 thu\u1eadt T\u1ea7n s\u1ed1 Radio \u2013 ARRL (Li\u00ean \u0111o\u00e0n Truy\u1ec1n d\u1eabn Radio M\u1ef9) <a class=\"underline\" href=\"https:\/\/www.arrl.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.arrl.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Gi\u00e1o d\u1ee5c K\u1ef9 thu\u1eadt Vi\u1ec5n th\u00f4ng \u2013 MIT OpenCourseWare <a class=\"underline\" href=\"https:\/\/ocw.mit.edu\/\" target=\"_blank\" rel=\"noopener\">https:\/\/ocw.mit.edu\/<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Khoa H\u1ecdc v\u00e0 K\u1ef9 Thu\u1eadt c\u1ee7a Vi\u1ec7c G\u1eafn Anten Ho\u00e0n H\u1ea3o: H\u01b0\u1edbng D\u1eabn K\u1ef9 Thu\u1eadt L\u1eddi khuy\u00ean \u0111i\u1ec3n h\u00ecnh v\u1ec1 vi\u1ec7c g\u1eafn anten l\u00e0 \u0111\u01a1n gi\u1ea3n: \u201cg\u1eafn c\u00e0ng cao c\u00e0ng t\u1ed1t.\u201d M\u1eb7c d\u00f9 \u0111i\u1ec1u n\u00e0y kh\u00f4ng sai, quy t\u1eafc \u0111\u01a1n gi\u1ea3n n\u00e0y ch\u1ec9 ch\u1ea1m v\u00e0o b\u1ec1 m\u1eb7t c\u1ee7a m\u1ed9t l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p. C\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t th\u1ef1c s\u1ef1 v\u00e0 an to\u00e0n l\u00e2u d\u00e0i kh\u00f4ng ch\u1ec9 \u0111\u1ebfn t\u1eeb chi\u1ec1u cao, m\u00e0 c\u00f2n t\u1eeb vi\u1ec7c c\u1ea9n th\u1eadn [\u2026]<\/p>","protected":false},"author":1,"featured_media":2642,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-2638","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-5g-communication-fasteners"],"_links":{"self":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/comments?post=2638"}],"version-history":[{"count":3,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2638\/revisions"}],"predecessor-version":[{"id":2874,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2638\/revisions\/2874"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/2642"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=2638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/categories?post=2638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/tags?post=2638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}