{"id":4050,"date":"2025-07-22T00:00:00","date_gmt":"2025-07-22T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/rfi-radio-frequency-interference-causes-effects-solutions\/"},"modified":"2026-06-10T01:39:58","modified_gmt":"2026-06-10T01:39:58","slug":"rfi-radio-frequency-interference-causes-effects-solutions","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/rfi-radio-frequency-interference-causes-effects-solutions","title":{"rendered":"RFI (Nhi\u1ec5u t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn) l\u00e0 g\u00ec?"},"content":{"rendered":"<h2 class=\"wp-block-heading\" >\ud83d\udce1 Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Nhi\u1ec5m x\u1ea1 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RFI)<\/strong> l\u00e0m gi\u00e1n \u0111o\u1ea1n c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng d\u00e2y nh\u01b0 \u0111i\u1ec7n tho\u1ea1i v\u00e0 Wi-Fi b\u1eb1ng c\u00e1ch g\u00e2y ra c\u00e1c t\u00edn hi\u1ec7u kh\u00f4ng mong mu\u1ed1n l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t v\u00e0 g\u00e2y ra s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i.<\/p><\/li><li><p>Ph\u1ed5 bi\u1ebfn<br> <strong>C\u00e1c ngu\u1ed3n g\u00e2y nhi\u1ec5u RFI<\/strong> bao g\u1ed3m c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed trong gia \u0111\u00ecnh, c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng t\u1ef1 nhi\u00ean nh\u01b0 gi\u00f4ng b\u00e3o v\u00e0 c\u00e1c m\u00f4i tr\u01b0\u1eddng \u0111\u00f4 th\u1ecb \u0111\u00f4ng \u0111\u00fac v\u1edbi nhi\u1ec1u thi\u1ebft b\u1ecb; do \u0111\u00f3, vi\u1ec7c nh\u1eadn bi\u1ebft nh\u1eefng ngu\u1ed3n n\u00e0y gi\u00fap b\u1ea1n x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n g\u00e2y nhi\u1ec5u.<\/p><\/li><li><p>Vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc RFI, n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch, che ch\u1eafn v\u00e0 b\u1ed1 tr\u00ed thi\u1ebft b\u1ecb m\u1ed9t c\u00e1ch th\u00f4ng minh c\u00f3 th\u1ec3 <strong>gi\u1ea3m thi\u1ec3u nhi\u1ec5u<\/strong> v\u00e0 \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh ngay c\u1ea3 khi c\u00e1c c\u00f4ng ngh\u1ec7 kh\u00f4ng d\u00e2y m\u1edbi li\u00ean t\u1ee5c ra \u0111\u1eddi.<\/p><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1312\" height=\"736\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d9caaecf1944f9eac429b0b1129620c.webp\" alt=\"What is RFI ?\" class=\"wp-image-4049\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d9caaecf1944f9eac429b0b1129620c.webp 1312w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d9caaecf1944f9eac429b0b1129620c-300x168.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d9caaecf1944f9eac429b0b1129620c-1024x574.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d9caaecf1944f9eac429b0b1129620c-768x431.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d9caaecf1944f9eac429b0b1129620c-18x10.webp 18w\" sizes=\"(max-width: 1312px) 100vw, 1312px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udce1 Gi\u1edbi thi\u1ec7u v\u1ec1 Nhi\u1ec5m x\u1ea1 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nhi\u1ec5m x\u1ea1 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RFI)<\/strong> l\u00e0 m\u1ed9t lo\u1ea1i <strong>nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (<\/strong><a target=\"_self\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-electromagnetic-interference\/\"><strong>EMI<\/strong><\/a><strong>)<\/strong> x\u1ea3y ra khi c\u00e1c t\u00edn hi\u1ec7u t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn kh\u00f4ng mong mu\u1ed1n l\u00e0m gi\u00e1n \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n t\u1eed ho\u1eb7c truy\u1ec1n th\u00f4ng. C\u00e1c t\u00edn hi\u1ec7u n\u00e0y th\u01b0\u1eddng n\u1eb1m trong d\u1ea3i t\u1ea7n <strong>10 kHz \u0111\u1ebfn 300 GHz<\/strong> v\u00e0 c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nhi\u1ec1u ngu\u1ed3n ch\u1ee7 \u00fd ho\u1eb7c v\u00f4 t\u00ecnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng d\u1ef1a tr\u00ean Ethernet, RFI l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng\u2014\u0111\u1eb7c bi\u1ec7t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng t\u1ed1c \u0111\u1ed9 cao ho\u1eb7c c\u00f4ng nghi\u1ec7p\u2014n\u01a1i n\u00f3 c\u00f3 th\u1ec3 l\u00e0m suy gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u, gi\u1ea3m th\u00f4ng l\u01b0\u1ee3ng d\u1eef li\u1ec7u ho\u1eb7c th\u1eadm ch\u00ed g\u00e2y ra s\u1ef1 c\u1ed1 m\u1ea5t k\u1ebft n\u1ed1i ho\u00e0n to\u00e0n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udce1 Nguy\u00ean nh\u00e2n g\u00e2y RFI?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec5m x\u1ea1 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RFI) \u0111\u01b0\u1ee3c g\u00e2y ra b\u1edfi c\u00e1c t\u00edn hi\u1ec7u v\u00f4 tuy\u1ebfn kh\u00f4ng mong mu\u1ed1n xu\u1ea5t ph\u00e1t t\u1eeb c\u1ea3 ngu\u1ed3n t\u1ef1 nhi\u00ean v\u00e0 nh\u00e2n t\u1ea1o. C\u00e1c nh\u00f3m nguy\u00ean nh\u00e2n ch\u00ednh bao g\u1ed3m:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u261b Thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p &amp; \u0111i\u1ec7n<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9ng c\u01a1, \u0111\u00e8n hu\u1ef3nh quang, l\u00f2 vi s\u00f3ng<\/p><\/li><li><p>Ngu\u1ed3n cung c\u1ea5p \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch (SMPS)<\/p><\/li><li><p>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n t\u1ea7n s\u1ed1 bi\u1ebfn \u0111\u1ed5i (VFDs)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u261b Thi\u1ebft b\u1ecb kh\u00f4ng d\u00e2y<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn Wi-Fi, Bluetooth, \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng<\/p><\/li><li><p>C\u00e1c thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng \u1edf d\u1ea3i t\u1ea7n 2,4 GHz v\u00e0 5 GHz c\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u l\u1eabn nhau<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u261b Y\u1ebfu t\u1ed1 v\u1eadt l\u00fd &amp; m\u00f4i tr\u01b0\u1eddng<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u01b0\u1eddng, t\u00f2a nh\u00e0 v\u00e0 \u0111\u1ed3 n\u1ed9i th\u1ea5t c\u00f3 th\u1ec3 ch\u1eb7n ho\u1eb7c ph\u1ea3n x\u1ea1 t\u00edn hi\u1ec7u<\/p><\/li><li><p>M\u01b0a, s\u01b0\u01a1ng m\u00f9 v\u00e0 c\u00e2y c\u1ed1i c\u00f3 th\u1ec3 h\u1ea5p th\u1ee5 ho\u1eb7c t\u00e1n x\u1ea1 c\u00e1c s\u00f3ng RF t\u1ea7n s\u1ed1 cao (\u0111\u1eb7c bi\u1ec7t tr\u00ean 10 GHz), \u1ea3nh h\u01b0\u1edfng ti\u1ec1m t\u00e0ng \u0111\u1ebfn c\u00e1c t\u00edn hi\u1ec7u kh\u00f4ng d\u00e2y nh\u01b0 5G ho\u1eb7c truy\u1ec1n th\u00f4ng v\u1ec7 tinh.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u261b Ngu\u1ed3n t\u1ef1 nhi\u00ean<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c ngu\u1ed3n t\u1ef1 nhi\u00ean nh\u01b0 s\u00e9t v\u00e0 b\u00f9ng n\u1ed5 m\u1eb7t tr\u1eddi c\u00f3 th\u1ec3 t\u1ea1o ra nhi\u1ec5u RF b\u0103ng th\u00f4ng r\u1ed9ng trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ef1c \u0111oan, m\u1eb7c d\u00f9 t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang l\u00ean c\u00e1c h\u1ec7 th\u1ed1ng Ethernet h\u00e0ng ng\u00e0y th\u01b0\u1eddng h\u1ea1n ch\u1ebf.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u261b V\u1ea5n \u0111\u1ec1 ph\u1ea7n c\u1ee9ng &amp; thi\u1ebft k\u1ebf<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1p kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ecdc ch\u1eafn, b\u1ed1 tr\u00ed m\u1ea1ch in (PCB) k\u00e9m<br><\/p><\/li><li><p>C\u00e1c \u0111\u1ea7u n\u1ed1i b\u1ecb \u0103n m\u00f2n ho\u1eb7c ch\u1ebf t\u1ea1o k\u00e9m c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng bi\u1ebfn \u0111i\u1ec7u giao thoa th\u1ee5 \u0111\u1ed9ng (PIM), m\u1ed9t hi\u1ec7u \u1ee9ng phi tuy\u1ebfn \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng RF c\u00f3 c\u00f4ng su\u1ea5t cao ho\u1eb7c m\u1eadt \u0111\u1ed9 t\u1ea7n s\u1ed1 d\u00e0y \u0111\u1eb7c.<br>.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u261b C\u00e1c ngu\u1ed3n ph\u00e1t x\u1ea1 ch\u1ee7 \u00fd &amp; v\u00f4 t\u00ecnh<br><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u00e0i hai chi\u1ec1u, thi\u1ebft b\u1ecb \u0111\u1ecdc RFID, m\u00e0n h\u00ecnh, CPU<br><\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udce1 C\u00e1ch gi\u1ea3m nhi\u1ec5u t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RFI)<br><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3m RFI \u0111\u00f2i h\u1ecfi x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u00e2y nhi\u1ec5u, s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt l\u1ecdc, tri\u1ec3n khai c\u00e1c chi\u1ebfn l\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t v\u00e0 b\u1ecdc ch\u1eafn, \u0111\u1ed3ng th\u1eddi \u00e1p d\u1ee5ng c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t trong thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng v\u00e0 b\u1ed1 tr\u00ed m\u1ea1ch Ethernet.<br>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >X\u00e1c \u0111\u1ecbnh ngu\u1ed3n RFI<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e1t hi\u1ec7n ch\u00ednh x\u00e1c l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean. S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>M\u00e1y ph\u00e2n t\u00edch ph\u1ed5<br><\/strong> \u2013 tr\u1ef1c quan h\u00f3a t\u00edn hi\u1ec7u d\u1ea3i h\u1eb9p\/d\u1ea3i r\u1ed9ng<br><\/p><\/li><li><p><strong>\u0102ng-ten \u0111\u1ecbnh h\u01b0\u1edbng<br><\/strong> (v\u00ed d\u1ee5: Yagi) \u2013 x\u00e1c \u0111\u1ecbnh h\u01b0\u1edbng t\u00edn hi\u1ec7u<br><\/p><\/li><li><p><strong>M\u00e1y ph\u00e2n t\u00edch th\u1eddi gian th\u1ef1c &amp; ph\u00e2n t\u00edch d\u1ea5u hi\u1ec7u<br><\/strong> \u2013 ghi l\u1ea1i nhi\u1ec5u t\u1ee9c th\u1eddi ho\u1eb7c l\u1eb7p l\u1ea1i<br><\/p><\/li><li><p><strong>C\u00f4ng c\u1ee5 l\u1eadp b\u1ea3n \u0111\u1ed3<br><\/strong> \u2013 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed ngu\u1ed3n b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p tam gi\u00e1c d\u1ef1a tr\u00ean GPS<br><\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>M\u1eb9o chuy\u00ean gia:<\/strong> C\u00e1c c\u00f4ng c\u1ee5 nh\u01b0<br> <em>AirSleuth-Pro<br><\/em> and <em>RFeye Site<br><\/em> r\u1ea5t h\u1eefu \u00edch cho ch\u1ea9n \u0111o\u00e1n RFI n\u00e2ng cao.<br>.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ed9 l\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt kh\u1eed RFI<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ed9 l\u1ecdc RFI \u1ee9c ch\u1ebf nhi\u1ec5u t\u1ea7n s\u1ed1 cao trong khi v\u1eabn cho ph\u00e9p truy\u1ec1n t\u00edn hi\u1ec7u mong mu\u1ed1n. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n<br><\/strong> \u2013 \u0111\u1ec3 ch\u1eb7n ph\u00e1t x\u1ea1 d\u1eabn truy\u1ec1n<br><\/p><\/li><li><p><strong>\u0110\u01b0\u1eddng d\u00e2y t\u00edn hi\u1ec7u<br><\/strong> \u2013 \u0111\u1ec3 \u1ee9c ch\u1ebf nhi\u1ec5u ch\u1ebf \u0111\u1ed9 vi sai v\u00e0 ch\u1ebf \u0111\u1ed9 chung<br><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 l\u1ecdc hi\u1ec7n \u0111\u1ea1i c\u00f3 th\u1ec3 bao g\u1ed3m:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Thi\u1ebft k\u1ebf thu nh\u1ecf<br><\/strong> d\u00e0nh cho thi\u1ebft b\u1ecb nh\u1ecf g\u1ecdn<br><\/p><\/li><li><p><strong>B\u1ed9 l\u1ecdc lai<br><\/strong> k\u1ebft h\u1ee3p c\u1ea3 ph\u01b0\u01a1ng ph\u00e1p \u1ee9c ch\u1ebf th\u1ee5 \u0111\u1ed9ng v\u00e0 ch\u1ee7 \u0111\u1ed9ng<br><\/p><\/li><li><p><strong>L\u1ecdc nhi\u1ec1u c\u1ea5p<br><\/strong> d\u00e0nh cho m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p c\u00f3 m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t cao<br><\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>B\u1ed9 l\u1ecdc x\u1eed l\u00fd c\u1ea3 hai lo\u1ea1i<br> <strong>nhi\u1ec5u ch\u1ebf \u0111\u1ed9 chung<br><\/strong> and <strong>nhi\u1ec5u ch\u1ebf \u0111\u1ed9 vi sai<br><\/strong> <br>.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >Gi\u1ea3m RFI \u0111\u1eb7c th\u00f9 cho Ethernet<br><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" > \u0110\u1ea7u n\u1ed1i RJ45 c\u00f3 l\u1edbp b\u1ecdc ch\u1eafn<br><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3 l\u1edbp b\u1ecdc kim lo\u1ea1i<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">B\u1ed9 n\u1ed1i RJ45<\/a> ng\u0103n ch\u1eb7n s\u1ef1 x\u00e2m nh\u1eadp\/xu\u1ea5t ph\u00e1t RF v\u00e0 b\u1ea3o v\u1ec7 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u.<br>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >Bi\u1ebfn \u00e1p m\u1ea1ng t\u00edch h\u1ee3p (LAN Transformers)<br><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\">B\u1ed9 bi\u1ebfn \u00e1p LAN<\/a> c\u00e1ch ly \u0111\u01b0\u1eddng truy\u1ec1n t\u00edn hi\u1ec7u v\u00e0 \u1ee9c ch\u1ebf nhi\u1ec5u gh\u00e9p v\u00e0o PHY Ethernet.<br>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >N\u1ed1i \u0111\u1ea5t &amp; b\u1ed1 tr\u00ed m\u1ea1ch in (PCB)<br><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng <strong>\u0111\u01b0\u1eddng tr\u1edf v\u1ec1 ng\u1eafn<br><\/strong> cho t\u00edn hi\u1ec7u t\u1ea7n s\u1ed1 cao<br><\/p><\/li><li><p>Duy tr\u00ec <strong>m\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t li\u1ec1n m\u1ea1ch<br><\/strong> n\u1eb1m d\u01b0\u1edbi c\u00e1c \u0111\u01b0\u1eddng d\u1eabn<br><\/p><\/li><li><p>N\u1ed1i<br> <strong>c\u00e1c tab b\u1ecdc ch\u1eafn c\u1ee7a \u0111\u1ea7u n\u1ed1i RJ45<br><\/strong> tr\u1ef1c ti\u1ebfp v\u1edbi<br> <strong>\u0111i\u1ec3m n\u1ed1i \u0111\u1ea5t v\u1ecf thi\u1ebft b\u1ecb<br><\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >C\u00e1p xo\u1eafn \u0111\u00f4i<br><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng <strong>C\u00e1p xo\u1eafn \u0111\u00f4i c\u00f3 b\u1ecdc ch\u1eafn (STP)<br><\/strong> trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec5u cao<br><\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch l\u1edbp b\u1ecdc c\u00e1p \u1edf c\u1ea3 hai \u0111\u1ea7u<br><\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" > N\u1ed1i \u0111\u1ea5t, b\u1ecdc ch\u1eafn v\u00e0 b\u1ed1 tr\u00ed thi\u1ebft b\u1ecb<br><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>N\u1ed1i \u0111\u1ea5t<\/strong>: \u0110\u01b0a nhi\u1ec5u an to\u00e0n v\u1ec1 \u0111\u1ea5t<\/p><\/li><li><p><strong>Ch\u1eafn nhi\u1ec5u<\/strong>: Ch\u1eb7n ho\u1eb7c ph\u1ea3n x\u1ea1 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RF) b\u1eb1ng c\u00e1c v\u1ecf b\u1ecdc (v\u00ed d\u1ee5: \u0111\u1ed3ng, nh\u00f4m)<\/p><\/li><li><p><strong>V\u1ecb tr\u00ed tri\u1ec3n khai<\/strong>: Tr\u00e1nh \u0111\u1eb7t c\u00e1c thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m g\u1ea7n l\u00f2 vi s\u00f3ng ho\u1eb7c \u0111i\u1ec7n tho\u1ea1i kh\u00f4ng d\u00e2y<\/p><\/li><li><p><strong>T\u00edch h\u1ee3p thi\u1ebft k\u1ebf<\/strong>: \u00c1p d\u1ee5ng ch\u1eafn nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI\/RFI) \u1edf giai \u0111o\u1ea1n thi\u1ebft k\u1ebf ban \u0111\u1ea7u \u0111\u1ec3 gi\u1ea3m chi ph\u00ed thi\u1ebft k\u1ebf l\u1ea1i<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udce1 RFI v\u00e0 EMI: S\u1ef1 kh\u00e1c bi\u1ec7t l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 thu\u1eadt ng\u1eef RFI th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng thay th\u1ebf cho EMI, nh\u01b0ng hai kh\u00e1i ni\u1ec7m n\u00e0y kh\u00f4ng ho\u00e0n to\u00e0n gi\u1ed1ng nhau. C\u1ea3 hai \u0111\u1ec1u m\u00f4 t\u1ea3 n\u0103ng l\u01b0\u1ee3ng g\u00e2y nhi\u1ec5u kh\u00f4ng mong mu\u1ed1n l\u00e0m gi\u00e1n \u0111o\u1ea1n h\u1ec7 th\u1ed1ng \u0111i\u1ec7n t\u1eed, nh\u01b0ng ch\u00fang t\u1eadp trung v\u00e0o c\u00e1c d\u1ea3i t\u1ea7n s\u1ed1 v\u00e0 ngu\u1ed3n g\u00e2y nhi\u1ec5u kh\u00e1c nhau. RFI (nhi\u1ec5u t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn) l\u00e0 m\u1ed9t t\u1eadp con c\u1ee7a EMI, \u0111\u1eb7c bi\u1ec7t li\u00ean quan \u0111\u1ebfn c\u00e1c t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong truy\u1ec1n th\u00f4ng kh\u00f4ng d\u00e2y. EMI bao qu\u00e1t ph\u1ea1m vi r\u1ed9ng h\u01a1n, bao g\u1ed3m c\u1ea3 nhi\u1ec5u \u1edf t\u1ea7n s\u1ed1 th\u1ea5p v\u00e0 cao.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Y\u1ebfu t\u1ed1<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec5m x\u1ea1 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RFI)<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec5m \u0111i\u1ec7n t\u1eeb (EMI)<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>D\u1ea3i t\u1ea7n s\u1ed1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c d\u1ea3i t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (s\u00f3ng v\u00f4 tuy\u1ebfn, vi ba)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u1ea1m vi r\u1ed9ng, t\u1eeb t\u1ea7n s\u1ed1 th\u1ea5p \u0111\u1ebfn cao<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c ngu\u1ed3n \u0111i\u1ec3n h\u00ecnh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn Wi-Fi, \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, Bluetooth, c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1eafn nhi\u1ec5u<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9ng c\u01a1, m\u00e1y ph\u00e1t \u0111i\u1ec7n, \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n, s\u00e9t, b\u00f9ng n\u1ed5 m\u1eb7t tr\u1eddi<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>B\u1ea3n ch\u1ea5t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00e0 t\u1eadp con c\u1ee7a EMI, ch\u1ee7 y\u1ebfu ph\u00e1t x\u1ea1 trong ph\u1ed5 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RF)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Bao g\u1ed3m EMI d\u1eabn truy\u1ec1n, c\u1ea3m \u1ee9ng, dung t\u00ednh v\u00e0 ph\u00e1t x\u1ea1<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u00e1c \u0111\u1ed9ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00e0m gi\u00e1n \u0111o\u1ea1n c\u00e1c h\u1ec7 th\u1ed1ng kh\u00f4ng d\u00e2y, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb truy\u1ec1n th\u00f4ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>G\u00e2y ra nhi\u1ec5u, s\u1ee5t gi\u1ea3m \u0111i\u1ec7n \u00e1p v\u00e0 can nhi\u1ec5u trong nhi\u1ec1u h\u1ec7 th\u1ed1ng<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udce1 C\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng mi\u1ec5n nhi\u1ec5m v\u1edbi RFI<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>B\u1ed9 chuy\u1ec3n m\u1ea1ch Ethernet c\u00f4ng nghi\u1ec7p<\/strong><\/p><\/li><li><p><strong>C\u00e1c thi\u1ebft b\u1ecb y t\u1ebf c\u00f3 giao di\u1ec7n m\u1ea1ng<\/strong><\/p><\/li><li><p><strong>C\u00e1c h\u1ec7 th\u1ed1ng Ethernet ngo\u00e0i tr\u1eddi ho\u1eb7c \u00f4 t\u00f4<\/strong><\/p><\/li><li><p><strong>C\u00e1c h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t PoE<\/strong><\/p><\/li><li><p><strong>C\u00e1c h\u1ec7 th\u1ed1ng nh\u00fang c\u00f3 PHY nh\u1ea1y c\u1ea3m<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">LINK-PP cung c\u1ea5p m\u1ed9t lo\u1ea1t s\u1ea3n ph\u1ea9m r\u1ed9ng l\u1edbn <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>m\u00f4-\u0111un bi\u1ebfn \u00e1p Ethernet<\/strong><\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf k\u1ef9 l\u01b0\u1ee1ng nh\u1eb1m \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u hi\u1ec7u su\u1ea5t EMI\/RFI c\u1ee7a <strong>c\u00e1c h\u1ec7 th\u1ed1ng tu\u00e2n th\u1ee7 IEEE 802.3<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udce1 K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nhi\u1ec5m x\u1ea1 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RFI)<\/strong> \u0111\u1eb7t ra th\u00e1ch th\u1ee9c nghi\u00eam tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng Ethernet t\u1ed1c \u0111\u1ed9 cao v\u00e0 h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng c\u00f4ng nghi\u1ec7p. RFI nghi\u00eam tr\u1ecdng c\u00f3 th\u1ec3 l\u00e0m suy gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u, gi\u1ea3m th\u00f4ng l\u01b0\u1ee3ng ho\u1eb7c trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ef1c \u0111oan, g\u00e2y ra s\u1ef1 c\u1ed1 truy\u1ec1n th\u00f4ng t\u1ea1m th\u1eddi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c gi\u1ea3m thi\u1ec3u RFI hi\u1ec7u qu\u1ea3 \u0111\u00f2i h\u1ecfi m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn to\u00e0n di\u1ec7n\u2014k\u1ebft h\u1ee3p c\u00e1c \u0111\u1ea7u n\u1ed1i \u0111\u01b0\u1ee3c b\u1ecdc ch\u1eafn, c\u00e1c bi\u1ebfn \u00e1p LAN ch\u1ea5t l\u01b0\u1ee3ng cao, b\u1ed1 tr\u00ed m\u1ea1ch in (PCB) t\u1ed1i \u01b0u v\u00e0 n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thi\u1ebft k\u1ebf ch\u1ee7 \u0111\u1ed9ng, ki\u1ec3m tra k\u1ef9 l\u01b0\u1ee1ng v\u00e0 gi\u00e1m s\u00e1t li\u00ean t\u1ee5c c\u00e1c nhi\u1ec5u \u0111\u1ec1u l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 duy tr\u00ec c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng \u1ed5n \u0111\u1ecbnh v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu EMI.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Xem Th\u00eam<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-electromagnetic-interference\/\">T\u00ecm hi\u1ec3u v\u1ec1 t\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec5u EMI l\u00ean thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-cpri-common-public-radio-interface\/\">Gi\u1edbi thi\u1ec7u v\u1ec1 Giao di\u1ec7n Radio C\u00f4ng c\u1ed9ng Chung (CPRI)<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-emc-electromagnetic-compatibility\/\">Kh\u00e1m ph\u00e1 kh\u00e1i ni\u1ec7m T\u01b0\u01a1ng th\u00edch \u0110i\u1ec7n t\u1eeb (EMC) \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/insertion-loss-impact-on-rj45-magjack\/\">T\u1ed5n hao ch\u00e8n \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn hi\u1ec7u n\u0103ng c\u1ee7a \u0111\u1ea7u n\u1ed1i RJ45 Magjack<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>RFI \u2013 Nhi\u1ec5u t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn l\u00e0 c\u00e1c t\u00edn hi\u1ec7u v\u00f4 tuy\u1ebfn kh\u00f4ng mong mu\u1ed1n l\u00e0m gi\u00e1n \u0111o\u1ea1n c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 truy\u1ec1n th\u00f4ng.<\/p>","protected":false},"author":1,"featured_media":4049,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[22,23,25],"class_list":["post-4050","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-integrated-rj45-connectors","tag-link-pp-lan-transformers","tag-modular-jack"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4050","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=4050"}],"version-history":[{"count":2,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4050\/revisions"}],"predecessor-version":[{"id":9414,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4050\/revisions\/9414"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4049"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4050"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4050"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}