{"id":12077,"date":"2026-04-13T09:53:47","date_gmt":"2026-04-13T01:53:47","guid":{"rendered":"https:\/\/safarimw.com\/?p=12077"},"modified":"2026-04-20T17:35:43","modified_gmt":"2026-04-20T09:35:43","slug":"what-is-the-function-of-the-rf-stage-in-a-receiver","status":"publish","type":"post","link":"https:\/\/safarimw.com\/vi\/what-is-the-function-of-the-rf-stage-in-a-receiver\/","title":{"rendered":"Ch\u1ee9c n\u0103ng c\u1ee7a giai \u0111o\u1ea1n RF trong b\u1ed9 thu l\u00e0 g\u00ec?"},"content":{"rendered":"

G\u1eb7p kh\u00f3 kh\u0103n v\u1edbi hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 thu m\u1eb7c d\u00f9 \u0111\u00e3 x\u1eed l\u00fd n\u00e2ng cao? \u0110i\u1ec3m ngh\u1ebdn c\u1ee7a h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 \u0111ang \u1ea9n trong nh\u1eefng y\u1ebfu t\u1ed1 th\u01b0\u1eddng b\u1ecb b\u1ecf qua Giai \u0111o\u1ea1n RF<\/a>1<\/a><\/sup>, gi\u1edbi h\u1ea1n kh\u1ea3 n\u0103ng t\u1ed5ng th\u1ec3 v\u00e0 k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ea1n.<\/p>\n

\u0110i\u1ec3m Giai \u0111o\u1ea1n RF<\/a>1<\/a><\/sup> ch\u1ecdn t\u00edn hi\u1ec7u t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn mong mu\u1ed1n t\u1eeb \u0103ng-ten, khu\u1ebfch \u0111\u1ea1i n\u00f3 l\u00ean m\u1ee9c s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c v\u00e0 l\u1ecdc b\u1ecf ti\u1ebfng \u1ed3n v\u00e0 nhi\u1ec5u kh\u00f4ng mong mu\u1ed1n. Qu\u00e1 tr\u00ecnh x\u1eed l\u00fd ban \u0111\u1ea7u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 nh\u1ea1y v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3 c\u1ee7a to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng thu.<\/strong><\/p>\n

\"S\u01a1<\/p>\n

T\u00f4i \u0111\u00e3 t\u1eebng ch\u1ee9ng ki\u1ebfn \u0111i\u1ec1u n\u00e0y tr\u1ef1c ti\u1ebfp. Ch\u00fang t\u00f4i \u0111ang l\u00e0m vi\u1ec7c tr\u00ean m\u1ed9t h\u1ec7 th\u1ed1ng radar ph\u1ee9c t\u1ea1p, v\u00e0 \u0111\u1ed3ng nghi\u1ec7p c\u1ee7a t\u00f4i, m\u1ed9t ti\u1ebfn s\u0129 xu\u1ea5t s\u1eafc t\u1eeb MIT, \u0111ang th\u00fac \u0111\u1ea9y gi\u1edbi h\u1ea1n c\u1ee7a x\u1eed l\u00fd b\u0103ng t\u1ea7n c\u01a1 s\u1edf<\/a>2<\/a><\/sup>. Anh \u1ea5y gi\u1edbi thi\u1ec7u v\u1ec1 AI v\u00e0 x\u1eed l\u00fd song song GPU, nh\u01b0ng ch\u00fang t\u00f4i v\u1eabn ch\u01b0a \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau hi\u1ec7u su\u1ea5t. \u00c1p l\u1ef1c r\u1ea5t l\u1edbn. C\u1ea3m gi\u00e1c nh\u01b0 ch\u00fang t\u00f4i b\u1ecf l\u1ee1 \u0111i\u1ec1u g\u00ec \u0111\u00f3 r\u00f5 r\u00e0ng, nh\u01b0ng kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y. Kinh nghi\u1ec7m n\u00e0y d\u1ea1y t\u00f4i m\u1ed9t b\u00e0i h\u1ecdc m\u00e0 t\u00f4i s\u1ebd kh\u00f4ng bao gi\u1edd qu\u00ean v\u1ec1 n\u01a1i m\u00e0 nh\u1eefng c\u1ea3i ti\u1ebfn hi\u1ec7u su\u1ea5t th\u1ef1c s\u1ef1 th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y. T\u1ea5t c\u1ea3 \u0111\u1ec1u d\u1ef1a tr\u00ean vi\u1ec7c hi\u1ec3u r\u00f5 t\u1eebng m\u1eaft x\u00edch trong chu\u1ed7i.<\/p>\n

T\u1ea1i sao B\u1ed9 khu\u1ebfch \u0111\u1ea1i ti\u1ebfng \u1ed3n th\u1ea5p (LNA) l\u1ea1i l\u00e0 ph\u1ea7n quan tr\u1ecdng nh\u1ea5t c\u1ee7a giai \u0111o\u1ea1n RF?<\/h2>\n

Are weak signals getting lost in system noise? A poor LNA adds noise at the very first step, making h\u1ed3i ph\u1ee5c t\u00edn hi\u1ec7u<\/a>3<\/a><\/sup> g\u1ea7n nh\u01b0 kh\u00f4ng th\u1ec3 sau n\u00e0y, b\u1ea5t k\u1ec3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd c\u1ee7a b\u1ea1n t\u1ed1t \u0111\u1ebfn \u0111\u00e2u.<\/p>\n

LNA l\u00e0 th\u00e0nh ph\u1ea7n ho\u1ea1t \u0111\u1ed9ng \u0111\u1ea7u ti\u00ean x\u1eed l\u00fd t\u00edn hi\u1ec7u y\u1ebfu t\u1eeb anten. Nhi\u1ec7m v\u1ee5 ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 khu\u1ebfch \u0111\u1ea1i t\u00edn hi\u1ec7u \u0111\u1ed3ng th\u1eddi th\u00eam v\u00e0o l\u01b0\u1ee3ng nhi\u1ec5u t\u1ed1i thi\u1ec3u nh\u1ea5t c\u00f3 th\u1ec3 c\u1ee7a ch\u00ednh n\u00f3. M\u1ed9t m\u1ee9c th\u1ea5p Ch\u1ec9 s\u1ed1 nhi\u1ec5u (NF)<\/a>4<\/a><\/sup> l\u00e0 t\u1ed1i quan tr\u1ecdng cho \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu<\/a>5<\/a><\/sup>.<\/strong><\/p>\n

\"M\u1ed9t<\/p>\n

Trong b\u1ea5t k\u1ef3 chu\u1ed7i b\u1ed9 thu n\u00e0o, hi\u1ec7u su\u1ea5t nhi\u1ec5u c\u1ee7a b\u1ed9 khu\u1ebfch \u0111\u1ea1i \u0111\u1ea7u ti\u00ean c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn nh\u1ea5t \u0111\u1ebfn to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng. \u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 quy t\u1eafc chung; \u0111\u00f3 l\u00e0 nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n c\u1ee7a k\u1ef9 thu\u1eadt RF \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1edfi c\u00f4ng th\u1ee9c Friis v\u1ec1 nhi\u1ec5u. Nhi\u1ec5u do th\u00e0nh ph\u1ea7n \u0111\u1ea7u ti\u00ean, b\u1ed9 khu\u1ebfch \u0111\u1ea1i th\u1ea5p ti\u1ebfng \u1ed3n (LNA), b\u1ecb khu\u1ebfch \u0111\u1ea1i b\u1edfi m\u1ecdi giai \u0111o\u1ea1n ti\u1ebfp theo. Ng\u01b0\u1ee3c l\u1ea1i, nhi\u1ec5u t\u1eeb c\u00e1c th\u00e0nh ph\u1ea7n sau c\u00f3 \u1ea3nh h\u01b0\u1edfng nh\u1ecf h\u01a1n nhi\u1ec1u \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u t\u1ed5ng th\u1ec3.<\/p>\n

\u0110\u00e2y ch\u00ednh x\u00e1c l\u00e0 nh\u1eefng g\u00ec ch\u00fang t\u00f4i \u0111\u00e3 g\u1eb7p ph\u1ea3i trong d\u1ef1 \u00e1n radar \u0111\u00f3. \u0110\u1ed3ng nghi\u1ec7p c\u1ee7a t\u00f4i \u0111\u00e3 c\u1ed1 g\u1eafng s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n ph\u1ee9c t\u1ea1p \u0111\u1ec3 t\u00ecm m\u1ed9t t\u00edn hi\u1ec7u y\u1ebfu trong bi\u1ec3n nhi\u1ec5u. Nh\u01b0ng b\u1ed9 khu\u1ebfch \u0111\u1ea1i nhi\u1ec5u th\u1ea5p (LNA) m\u00e0 ch\u00fang t\u00f4i \u0111ang s\u1eed d\u1ee5ng c\u00f3 ch\u1ec9 s\u1ed1 nhi\u1ec5u trung b\u00ecnh. T\u00edn hi\u1ec7u \u0111\u00e3 b\u1ecb \u1ea3nh h\u01b0\u1edfng tr\u01b0\u1edbc khi n\u00f3 \u0111\u1ebfn \u0111\u01b0\u1ee3c c\u00e1c b\u1ed9 x\u1eed l\u00fd k\u1ef9 thu\u1eadt s\u1ed1 cao c\u1ea5p c\u1ee7a anh \u1ea5y. Ch\u00fang t\u00f4i \u0111\u00e3 thay th\u1ebf n\u00f3 b\u1eb1ng m\u1ed9t b\u1ed9 khu\u1ebfch \u0111\u1ea1i nhi\u1ec5u cao hi\u1ec7u su\u1ea5t, v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00e3 r\u00f5 r\u00e0ng ngay l\u1eadp t\u1ee9c.<\/p>\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a Ch\u1ec9 s\u1ed1 Nhi\u1ec5u c\u1ee7a LNA<\/h3>\n

Ch\u1ec9 s\u1ed1 nhi\u1ec5u c\u1ee7a LNA th\u1ea5p h\u01a1n tr\u1ef1c ti\u1ebfp chuy\u1ec3n th\u00e0nh h\u1ec7 th\u1ed1ng t\u1ed1t h\u01a1n t\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u (SNR)<\/a>6<\/a><\/sup>.<\/p>\n\n\n\n\n\n\n\n\n\n
Th\u00f4ng s\u1ed1<\/th>\nLNA ti\u00eau chu\u1ea9n<\/th>\nLNA c\u1ee7a Safari Microwave<\/th>\n<\/tr>\n<\/thead>\n
Ch\u1ec9 s\u1ed1 nhi\u1ec5u (NF)<\/strong><\/td>\n2.5 dB<\/td>\n1.2 dB<\/strong><\/td>\n<\/tr>\n
T\u0103ng<\/strong><\/td>\n20 dB<\/td>\n20 dB<\/td>\n<\/tr>\n
T\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o<\/strong><\/td>\n-90 dBm<\/td>\n-90 dBm<\/td>\n<\/tr>\n
Ch\u1ec9 s\u1ed1 NF c\u1ee7a h\u1ec7 th\u1ed1ng (\u01b0\u1edbc t\u00ednh)<\/strong><\/td>\n~2.6 dB<\/td>\n~1.3 dB<\/strong><\/td>\n<\/tr>\n
SNR \u0111\u1ea7u ra<\/strong><\/td>\nGi\u1ea3m s\u00fat<\/td>\nC\u1ea3i thi\u1ec7n r\u00f5 r\u1ec7t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c b\u1ed9 khu\u1ebfch \u0111\u1ea1i nhi\u1ec5u si\u00eau th\u1ea5p c\u1ee7a ch\u00fang t\u00f4i, v\u1edbi ch\u1ec9 s\u1ed1 nhi\u1ec5u xu\u1ed1ng t\u1edbi 0.5 dB l\u00ean \u0111\u1ebfn 110 GHz, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho nh\u1eefng t\u00ecnh hu\u1ed1ng n\u00e0y. Ch\u00fang \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u ngay t\u1eeb \u0111\u1ea7u.<\/p>\n

C\u00e1c b\u1ed9 l\u1ecdc c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 thu trong giai \u0111o\u1ea1n RF nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n

B\u1ea1n c\u00f3 b\u1ed9 thu c\u1ee7a m\u00ecnh b\u1ecb qu\u00e1 t\u1ea3i b\u1edfi c\u00e1c t\u00edn hi\u1ec7u m\u1ea1nh, g\u1ea7n \u0111\u00f3 kh\u00f4ng? N\u1ebfu kh\u00f4ng c\u00f3 b\u1ed9 l\u1ecdc ph\u00f9 h\u1ee3p, nhi\u1ec5u kh\u00f4ng mong mu\u1ed1n c\u00f3 th\u1ec3 l\u00e0m b\u00e3o h\u00f2a h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n, ho\u00e0n to\u00e0n che khu\u1ea5t t\u00edn hi\u1ec7u m\u00e0 b\u1ea1n th\u1ef1c s\u1ef1 mu\u1ed1n nh\u1eadn.<\/p>\n

B\u1ed9 l\u1ecdc trong Giai \u0111o\u1ea1n RF<\/a>1<\/a><\/sup> ho\u1ea1t \u0111\u1ed9ng nh\u01b0 nh\u1eefng ng\u01b0\u1eddi g\u00e1c c\u1ed5ng. Ch\u00fang ch\u1ecdn l\u1ecdc truy\u1ec1n qua d\u1ea3i t\u1ea7n s\u1ed1 mong mu\u1ed1n trong khi lo\u1ea1i b\u1ecf c\u00e1c t\u00edn hi\u1ec7u ngo\u00e0i d\u1ea3i v\u00e0 nhi\u1ec5u. \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n c\u00e1c nhi\u1ec5u m\u1ea1nh l\u00e0m qu\u00e1 t\u1ea3i c\u00e1c b\u1ed9 khu\u1ebfch \u0111\u1ea1i v\u00e0 b\u1ed9 tr\u1ed9n ti\u1ebfp theo, hi\u1ec7n t\u01b0\u1ee3ng g\u1ecdi l\u00e0 ch\u1eb7n.<\/strong><\/p>\n

\"\u0110\u01b0\u1eddng<\/p>\n

Ngay c\u1ea3 v\u1edbi b\u1ed9 LNA t\u1ed1t nh\u1ea5t, b\u1ed9 thu c\u1ee7a b\u1ea1n v\u1eabn d\u1ec5 b\u1ecb t\u1ed5n th\u01b0\u01a1ng. Kh\u00f4ng kh\u00ed \u0111\u1ea7y c\u00e1c t\u00edn hi\u1ec7u m\u1ea1nh t\u1eeb c\u00e1c tr\u1ea1m ph\u00e1t s\u00f3ng di \u0111\u1ed9ng, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn Wi-Fi v\u00e0 c\u00e1c b\u1ed9 ph\u00e1t kh\u00e1c. N\u1ebfu c\u00e1c t\u00edn hi\u1ec7u kh\u00f4ng mong mu\u1ed1n n\u00e0y x\u00e2m nh\u1eadp v\u00e0o LNA c\u1ee7a b\u1ea1n, ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i \u0111\u1ebfn m\u1ee9c g\u00e2y qu\u00e1 t\u1ea3i ho\u1eb7c b\u1ed9 tr\u1ed9n ti\u1ebfp theo. \u0110i\u1ec1u n\u00e0y g\u1ecdi l\u00e0 \"ch\u1eb7n\" ho\u1eb7c \"b\u00e3o h\u00f2a.\" Khi m\u1ed9t giai \u0111o\u1ea1n b\u1ecb b\u00e3o h\u00f2a, n\u00f3 kh\u00f4ng c\u00f2n x\u1eed l\u00fd \u0111\u00fang t\u00edn hi\u1ec7u y\u1ebfu m\u00e0 b\u1ea1n quan t\u00e2m n\u1eefa. N\u00f3 gi\u1ed1ng nh\u01b0 c\u1ed1 g\u1eafng nghe m\u1ed9t ti\u1ebfng th\u00ec th\u1ea7m trong khi ai \u0111\u00f3 \u0111ang la h\u00e9t b\u00ean tai b\u1ea1n.<\/p>\n

Trong h\u1ec7 th\u1ed1ng radar \u0111\u00f3, \u0111\u00e2y l\u00e0 ph\u1ea7n th\u1ee9 hai c\u1ee7a c\u00e2u \u0111\u1ed1. Sau khi c\u1ea3i thi\u1ec7n LNA, hi\u1ec7u su\u1ea5t \u0111\u00e3 t\u1ed1t h\u01a1n, nh\u01b0ng v\u1eabn c\u00f2n kh\u00f4ng \u1ed5n \u0111\u1ecbnh. Ch\u00fang t\u00f4i ph\u00e1t hi\u1ec7n ra r\u1eb1ng c\u00e1c t\u00edn hi\u1ec7u li\u00ean l\u1ea1c m\u1ea1nh, ngo\u00e0i d\u1ea3i t\u1ea7n, \u0111\u00f4i khi r\u00f2 r\u1ec9 v\u00e0o chu\u1ed7i b\u1ed9 thu c\u1ee7a ch\u00fang t\u00f4i. Ch\u00fang l\u00e0m t\u0103ng m\u1ee9c nhi\u1ec5u t\u1ed5ng th\u1ec3 v\u00e0 khi\u1ebfn c\u00f4ng vi\u1ec7c c\u1ee7a b\u1ed9 x\u1eed l\u00fd c\u01a1 s\u1edf tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n nhi\u1ec1u. B\u1eb1ng c\u00e1ch th\u00eam m\u1ed9t b\u1ed9 l\u1ecdc b\u0103ng th\u00f4ng h\u1eb9p, ch\u1ecdn l\u1ecdc h\u01a1n ngay sau anten, ch\u00fang t\u00f4i \u0111\u00e3 lo\u1ea1i b\u1ecf c\u00e1c nhi\u1ec5u n\u00e0y. T\u00edn hi\u1ec7u \u0111\u1ebfn b\u1ed9 x\u1eed l\u00fd gi\u1edd \u0111\u00e2y kh\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i m\u00e0 c\u00f2n s\u1ea1ch s\u1ebd.<\/p>\n

Vai tr\u00f2 c\u1ee7a B\u1ed9 l\u1ecdc nh\u01b0 m\u1ed9t Ng\u01b0\u1eddi g\u00e1c c\u1ed5ng<\/h3>\n

B\u1ea3ng n\u00e0y cho th\u1ea5y c\u00e1ch m\u1ed9t b\u1ed9 l\u1ecdc b\u1ea3o v\u1ec7 chu\u1ed7i b\u1ed9 thu kh\u1ecfi m\u1ed9t t\u00edn hi\u1ec7u nhi\u1ec5u m\u1ea1nh.<\/p>\n\n\n\n\n\n\n\n\n
T\u00ecnh hu\u1ed1ng T\u00edn hi\u1ec7u<\/th>\nKh\u00f4ng c\u00f3 B\u1ed9 l\u1ecdc RF<\/th>\nC\u00f3 B\u1ed9 l\u1ecdc RF<\/th>\n<\/tr>\n<\/thead>\n
T\u00edn hi\u1ec7u mong mu\u1ed1n<\/strong><\/td>\n-95 dBm<\/td>\n-95 dBm<\/td>\n<\/tr>\n
T\u00edn hi\u1ec7u nhi\u1ec5u<\/strong><\/td>\n-30 dBm (trong d\u1ea3i)<\/td>\n-90 dBm (b\u1ecb lo\u1ea1i b\u1ecf)<\/td>\n<\/tr>\n
T\u00edn hi\u1ec7u t\u1ea1i \u0111\u1ea7u ra c\u1ee7a LNA<\/strong><\/td>\nBi\u1ebfn d\u1ea1ng \/ B\u1ecb ch\u1eb7n<\/td>\nS\u1ea1ch s\u1ebd & \u0110\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i<\/td>\n<\/tr>\n
Hi\u1ec7u su\u1ea5t H\u1ec7 th\u1ed1ng<\/strong><\/td>\nK\u00e9m \/ Th\u1ea5t b\u1ea1i<\/td>\nT\u1ed1i \u01b0u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Li\u1ec7u x\u1eed l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u01a1 b\u1ea3n n\u00e2ng cao c\u00f3 th\u1ec3 b\u00f9 \u0111\u1eafp cho ph\u1ea7n RF ph\u00eda tr\u01b0\u1edbc k\u00e9m?<\/h2>\n

D\u1ef1a v\u00e0o x\u1eed l\u00fd k\u1ef9 thu\u1eadt s\u1ed1 m\u1ea1nh m\u1ebd \u0111\u1ec3 s\u1eeda m\u1ed9t t\u00edn hi\u1ec7u nhi\u1ec5u? Ph\u01b0\u01a1ng ph\u00e1p \"\u0111\u1ea7u v\u00e0o r\u00e1c, \u0111\u1ea7u ra tin l\u00e0nh\" n\u00e0y hi\u1ebfm khi hi\u1ec7u qu\u1ea3 v\u00e0 l\u00e3ng ph\u00ed c\u00f4ng su\u1ea5t x\u1eed l\u00fd qu\u00fd gi\u00e1 v\u00e0o vi\u1ec7c l\u00e0m s\u1ea1ch nhi\u1ec5u c\u00f3 th\u1ec3 ph\u00f2ng tr\u00e1nh \u0111\u01b0\u1ee3c.<\/p>\n

Trong khi c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn x\u1eed l\u00fd b\u0103ng t\u1ea7n c\u01a1 s\u1edf<\/a>2<\/a><\/sup> l\u00e0 m\u1ea1nh m\u1ebd, n\u00f3 kh\u00f4ng th\u1ec3 t\u1ea1o ra th\u00f4ng tin b\u1ecb m\u1ea5t trong Giai \u0111o\u1ea1n RF<\/a>1<\/a><\/sup>. N\u1ebfu t\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u qu\u00e1 th\u1ea5p ho\u1eb7c t\u00edn hi\u1ec7u b\u1ecb bi\u1ebfn d\u1ea1ng t\u1eeb \u0111\u1ea7u, kh\u00f4ng c\u00f3 b\u1ed9 l\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1 hay AI n\u00e0o c\u00f3 th\u1ec3 ph\u1ee5c h\u1ed3i ho\u00e0n h\u1ea3o.<\/strong><\/p>\n

\"M\u00e0n<\/p>\n

\u0110\u00e2y l\u00e0 b\u00e0i h\u1ecdc quan tr\u1ecdng nh\u1ea5t t\u1eeb kinh nghi\u1ec7m c\u1ee7a t\u00f4i v\u1edbi ti\u1ebfn s\u0129 MIT. Chuy\u00ean m\u00f4n c\u1ee7a \u00f4ng l\u00e0 trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt s\u1ed1, s\u1eed d\u1ee5ng AI v\u00e0 s\u1ee9c m\u1ea1nh x\u1eed l\u00fd l\u1edbn \u0111\u1ec3 t\u1ea1o ra ph\u00e9p m\u00e0u v\u1edbi c\u00e1c t\u00edn hi\u1ec7u. \u00d4ng ngh\u0129 r\u1eb1ng m\u00ecnh c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft m\u1ecdi v\u1ea5n \u0111\u1ec1 \u1edf \u0111\u00f3. Nh\u01b0ng \u00f4ng \u0111\u00e3 g\u1eb7p gi\u1edbi h\u1ea1n c\u01a1 b\u1ea3n. C\u00e1c thu\u1eadt to\u00e1n c\u1ee7a \u00f4ng c\u1ed1 g\u1eafng ph\u1ee5c h\u1ed3i m\u1ed9t t\u00edn hi\u1ec7u \u0111\u00e3 b\u1ecb ch\u00f4n v\u00f9i trong nhi\u1ec5u v\u00e0 bi\u1ebfn d\u1ea1ng b\u1edfi m\u1ed9t b\u1ed9 ti\u1ec1n khu\u1ebfch \u0111\u1ea1i RF trung b\u00ecnh. \u0110\u00f3 l\u00e0 nguy\u00ean t\u1eafc c\u1ed5 \u0111i\u1ec3n c\u1ee7a \"\u0110\u1ea7u v\u00e0o r\u00e1c, \u0111\u1ea7u ra r\u00e1c.\"<\/p>\n

Gi\u1edbi h\u1ea1n c\u1ee7a ch\u1ec9nh s\u1eeda k\u1ef9 thu\u1eadt s\u1ed1<\/h3>\n

D\u00f9 thu\u1eadt to\u00e1n c\u00f3 th\u00f4ng minh \u0111\u1ebfn \u0111\u00e2u, n\u00f3 ch\u1ec9 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng v\u1edbi d\u1eef li\u1ec7u nh\u1eadn \u0111\u01b0\u1ee3c t\u1eeb B\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1 sang k\u1ef9 thu\u1eadt s\u1ed1 (ADC). N\u1ebfu t\u00edn hi\u1ec7u \u0111\u00e3 b\u1ecb nhi\u1ec5u, nhi\u1ec7m v\u1ee5 c\u1ee7a thu\u1eadt to\u00e1n chuy\u1ec3n t\u1eeb ph\u00e1t hi\u1ec7n t\u00edn hi\u1ec7u sang m\u1ed9t v\u1ea5n \u0111\u1ec1 gi\u1ea3m nhi\u1ec5u kh\u00f3 h\u01a1n nhi\u1ec1u. N\u00f3 c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n ch\u00fat \u00edt, nh\u01b0ng kh\u00f4ng th\u1ec3 kh\u00f4i ph\u1ee5c ho\u00e0n to\u00e0n ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u ban \u0111\u1ea7u \u0111\u00e3 m\u1ea5t. Cu\u1ed1i c\u00f9ng, n\u00f3 \u0111o\u00e1n m\u00f2, \u0111i\u1ec1u n\u00e0y g\u00e2y ra l\u1ed7i.<\/p>\n

M\u1ed9t s\u1ef1 h\u1ee3p t\u00e1c, ch\u1ee9 kh\u00f4ng ph\u1ea3i thay th\u1ebf<\/h3>\n

C\u00e1ch ti\u1ebfp c\u1eadn t\u1ed1t nh\u1ea5t l\u00e0 xem Giai \u0111o\u1ea1n RF<\/a>1<\/a><\/sup> v\u00e0 b\u1ed9 x\u1eed l\u00fd c\u01a1 s\u1edf l\u00e0m vi\u1ec7c nh\u01b0 nh\u1eefng \u0111\u1ed1i t\u00e1c. M\u1ed9t giai \u0111o\u1ea1n RF ch\u1ea5t l\u01b0\u1ee3ng cao cung c\u1ea5p t\u00edn hi\u1ec7u s\u1ea1ch, m\u1ea1nh cho ADC. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ed9 x\u1eed l\u00fd c\u01a1 s\u1edf t\u1eadp trung v\u00e0o nh\u1eefng g\u00ec n\u00f3 l\u00e0m t\u1ed1t nh\u1ea5t: gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u, theo d\u00f5i m\u1ee5c ti\u00eau v\u00e0 th\u1ef1c hi\u1ec7n ph\u00e2n t\u00edch ph\u1ee9c t\u1ea1p. N\u00f3 kh\u00f4ng c\u1ea7n ph\u1ea3i l\u00e3ng ph\u00ed chu k\u1ef3 \u0111\u1ec3 l\u00e0m s\u1ea1ch \u0111\u1ed1ng l\u1ed9n x\u1ed9n. B\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a LNA v\u00e0 b\u1ed9 l\u1ecdc trong radar c\u1ee7a ch\u00fang t\u00f4i, ch\u00fang t\u00f4i \u0111\u00e3 cung c\u1ea5p cho c\u00e1c thu\u1eadt to\u00e1n xu\u1ea5t s\u1eafc c\u1ee7a \u0111\u1ed3ng nghi\u1ec7p t\u00f4i m\u1ed9t t\u00edn hi\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u1ec3 l\u00e0m vi\u1ec7c c\u00f9ng. S\u1ef1 thay \u0111\u1ed5i nh\u1ecf trong giai \u0111o\u1ea1n RF \"ch\u00edn mu\u1ed3i\" \u0111\u00e3 m\u1edf kh\u00f3a to\u00e0n b\u1ed9 ti\u1ec1m n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf n\u00e2ng cao c\u1ee7a \u00f4ng \u1ea5y. Cu\u1ed1i c\u00f9ng, \u00f4ng \u1ea5y c\u00f3 th\u1ec3 th\u1edf ph\u00e0o nh\u1eb9 nh\u00f5m.<\/p>\n

K\u1ebft lu\u1eadn<\/h2>\n

A b\u1ed9 thu hi\u1ec7u su\u1ea5t cao<\/a>7<\/a><\/sup>starts with a high-quality RF stage. Optimizing your front-end is the most effective way to achieve superior overall system performance and avoid unnecessary complications later.<\/p>\n

  1. Hi\u1ec3u r\u00f5 giai \u0111o\u1ea1n RF l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t b\u1ed9 thu v\u00e0 gi\u1ea3i quy\u1ebft c\u00e1c \u0111i\u1ec3m ngh\u1ebdn ti\u1ec1m n\u0103ng.\r \u21a9<\/a><\/p><\/li>

  2. Kh\u00e1m ph\u00e1 c\u00e1ch x\u1eed l\u00fd c\u01a1 s\u1edf l\u00e0m b\u1ed5 sung cho c\u00e1c giai \u0111o\u1ea1n RF \u0111\u1ec3 x\u1eed l\u00fd t\u00edn hi\u1ec7u t\u1ed1i \u01b0u.\r \u21a9<\/a><\/p><\/li>

  3. Hi\u1ec3u r\u00f5 nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng m\u1ea1nh m\u1ebd h\u01a1n.\r \u21a9<\/a><\/p><\/li>

  4. T\u00ecm hi\u1ec3u c\u00e1ch NF \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u v\u00e0 t\u1ea1i sao n\u00f3 quan tr\u1ecdng cho thi\u1ebft k\u1ebf RF hi\u1ec7u qu\u1ea3.\r \u21a9<\/a><\/p><\/li>

  5. Hi\u1ec3u r\u00f5 c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 c\u1ee7a c\u00e1c b\u1ed9 thu c\u1ee7a m\u00ecnh.\r \u21a9<\/a><\/p><\/li>

  6. Hi\u1ec3u r\u00f5 SNR l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 n\u00e2ng cao \u0111\u1ed9 r\u00f5 r\u00e0ng c\u1ee7a truy\u1ec1n th\u00f4ng v\u00e0 hi\u1ec7u qu\u1ea3 h\u1ec7 th\u1ed1ng.\r \u21a9<\/a><\/p><\/li>

  7. Kh\u00e1m ph\u00e1 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a b\u1ed9 thu hi\u1ec7u su\u1ea5t cao \u0111\u1ec3 n\u00e2ng cao thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n.\r \u21a9<\/a><\/p><\/li><\/ol><\/div>","protected":false},"excerpt":{"rendered":"

    Struggling with receiver performance despite advanced processing? Your system’s bottleneck might be hiding in the often-overlooked RF stage1, limiting your overall potential and final results. The RF stage1 selects the desired radio frequency signal from the antenna, amplifies it to a usable level, and filters out unwanted noise and interference. This initial processing is crucial […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-12077","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/posts\/12077","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/comments?post=12077"}],"version-history":[{"count":12,"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/posts\/12077\/revisions"}],"predecessor-version":[{"id":12126,"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/posts\/12077\/revisions\/12126"}],"wp:attachment":[{"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/media?parent=12077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/categories?post=12077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/safarimw.com\/vi\/wp-json\/wp\/v2\/tags?post=12077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}