V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng c\u1ee7a truy\u1ec1n th\u00f4ng v\u1ec7 tinh v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng s\u00f3ng milimet, m\u1ed9t h\u1ec7 th\u1ed1ng th\u1eed nghi\u1ec7m v\u00e0 truy c\u1eadp \u0111\u00e1ng tin c\u1eady, \u0111a n\u0103ng v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng \u0111\u00e3 tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng an to\u00e0n v\u00e0 \u0111\u1ed5i m\u1edbi c\u00f4ng ngh\u1ec7. Vi\u1ec7c t\u00edch h\u1ee3p c\u00e1c thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng \u0111a n\u0103ng s\u00f3ng milimet v\u1edbi h\u1ec7 th\u1ed1ng VSAT (Very Small Aperture Terminal) \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u trong vi\u1ec7c thu ph\u00e1t truy\u1ec1n h\u00ecnh v\u1ec7 tinh, ph\u00e1t s\u00f3ng v\u00e0 truy c\u1eadp m\u1ea1ng v\u1ec7 tinh, \u0111\u1ed3ng th\u1eddi h\u1ed7 tr\u1ee3 m\u1ecdi \u1ee9ng d\u1ee5ng truy\u1ec1n th\u00f4ng v\u1ec7 tinh d\u1ef1a tr\u00ean TCP\/IP. B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p c\u00e1c h\u1ec7 th\u1ed1ng \u0103ng-ten, m\u00f4-\u0111un thu ph\u00e1t v\u00e0 c\u00e1c \u0111\u01a1n v\u1ecb m\u00e3 h\u00f3a\/gi\u1ea3i m\u00e3, gi\u1ea3i ph\u00e1p n\u00e0y cung c\u1ea5p h\u1ed7 tr\u1ee3 m\u1ea1nh m\u1ebd cho c\u00e1c c\u1ea5u tr\u00fac m\u1ea1ng \u0111i\u1ec3m-\u0111i\u1ec3m, m\u1ea1ng sao v\u00e0 m\u1ea1ng l\u01b0\u1edbi ho\u00e0n to\u00e0n.<\/p>\n\n\n\n
H\u1ec7 th\u1ed1ng \u0103ng-ten n\u00e0y c\u00f3 thi\u1ebft k\u1ebf ti\u00eau \u0111i\u1ec3m ch\u00ednh v\u00e0 l\u1ec7ch t\u00e2m d\u00e0i 1,2 m\u00e9t, ho\u1ea1t \u0111\u1ed9ng \u1edf d\u1ea3i t\u1ea7n 18,5\u201319,5 GHz cho ch\u1ebf \u0111\u1ed9 thu v\u00e0 28,7\u201329,5 GHz cho ch\u1ebf \u0111\u1ed9 ph\u00e1t, v\u1edbi hi\u1ec7u su\u1ea5t xuy\u00ean ph\u00e2n c\u1ef1c xu\u1ea5t s\u1eafc. M\u00f4-\u0111un thu ph\u00e1t ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 19,075 GHz (Rx) v\u00e0 28,875 GHz (Tx), cung c\u1ea5p \u0111\u1ed9 l\u1ee3i 55 dB v\u1edbi c\u00f4ng su\u1ea5t \u0111\u1ea7u ra l\u00ean \u0111\u1ebfn 37 dBm. B\u1ed9 m\u00e3 h\u00f3a tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n DVB-S, h\u1ed7 tr\u1ee3 \u0111i\u1ec1u ch\u1ebf QPSK, video MPEG-2, gi\u1ea3i m\u00e3 \u00e2m thanh AAC v\u00e0 nhi\u1ec1u giao di\u1ec7n I\/O bao g\u1ed3m HDMI v\u00e0 RCA. \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t, thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i n\u00e0y \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh trong kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 t\u1eeb -40 \u0111\u1ebfn 60\u2103 v\u00e0 d\u01b0\u1edbi t\u1ea3i tr\u1ecdng di chuy\u1ec3n l\u00ean \u0111\u1ebfn 80 km\/h.<\/p>\n\n\n\n
V\u1ec1 m\u1eb7t \u0111o l\u01b0\u1eddng, M\u00e1y ph\u00e2n t\u00edch m\u1ea1ng vect\u01a1 (VNA) v\u00e0 M\u00e1y ph\u00e2n t\u00edch m\u1ea1ng v\u00f4 h\u01b0\u1edbng bao ph\u1ee7 d\u1ea3i t\u1ea7n s\u1ed1 r\u1ed9ng t\u1eeb 26,5 \u0111\u1ebfn 170 GHz. M\u00e1y ph\u00e2n t\u00edch m\u1ea1ng vect\u01a1 (VNA) th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p \u0111o th\u00f4ng s\u1ed1 S t\u1ef1 \u0111\u1ed9ng, bao g\u1ed3m c\u1ea3 thi\u1ebft b\u1ecb hai c\u1ed5ng v\u00e0 b\u1ed1n c\u1ed5ng, v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c cao trong c\u00e1c ph\u00e9p \u0111o bi\u00ean \u0111\u1ed9 (\u00b10,66 dB) v\u00e0 pha. M\u00e1y ph\u00e2n t\u00edch m\u1ea1ng v\u00f4 h\u01b0\u1edbng t\u1eadp trung v\u00e0o c\u00e1c ph\u00e9p \u0111o t\u1ed5n th\u1ea5t ph\u1ea3n x\u1ea1, \u0111\u1ed9 l\u1ee3i v\u00e0 VSWR, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong th\u1eed nghi\u1ec7m b\u1ed9 khu\u1ebfch \u0111\u1ea1i, b\u1ed9 tr\u1ed9n, b\u1ed9 l\u1ecdc v\u00e0 b\u1ed9 gh\u00e9p k\u00eanh. C\u1ea3 hai h\u1ec7 th\u1ed1ng \u0111\u1ec1u h\u1ed7 tr\u1ee3 giao di\u1ec7n Ethernet v\u00e0 RS-232, cho ph\u00e9p t\u00edch h\u1ee3p li\u1ec1n m\u1ea1ch v\u00e0o c\u00e1c m\u00f4i tr\u01b0\u1eddng th\u1eed nghi\u1ec7m t\u1ef1 \u0111\u1ed9ng.<\/p>\n\n\n\n
\u0110\u1ed1i v\u1edbi vi\u1ec7c gi\u00e1m s\u00e1t kh\u00f4ng ti\u1ebfp x\u00fac, c\u00e1c c\u1ea3m bi\u1ebfn rung \u0111\u1ed9ng vi s\u00f3ng \u201cRVS-36P\u201d v\u00e0 \u201cRVS-94\u201d cung c\u1ea5p c\u00e1c ph\u00e9p \u0111o \u0111\u1ed9 d\u1ecbch chuy\u1ec3n, v\u1eadn t\u1ed1c v\u00e0 gia t\u1ed1c v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao. Nh\u1edd s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 ph\u00e1t hi\u1ec7n s\u00f3ng \u0111i\u1ec7n t\u1eeb, c\u00e1c thi\u1ebft b\u1ecb n\u00e0y lo\u1ea1i b\u1ecf \u0111\u01b0\u1ee3c c\u00e1c sai s\u1ed1 do ti\u1ebfp x\u00fac c\u01a1 h\u1ecdc v\u00e0 l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng \u0111\u1ec3 gi\u00e1m s\u00e1t c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng nh\u1eb9, v\u1eadn h\u00e0nh \u1edf t\u1ed1c \u0111\u1ed9 cao ho\u1eb7c ho\u1ea1t \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n\n\n\n
\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf chuy\u00ean d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng radar, h\u1ec7 th\u1ed1ng n\u00e0y bao g\u1ed3m m\u1ed9t m\u00f4-\u0111un ph\u00e1t\/nh\u1eadn \u0111a k\u00eanh c\u00f3 kh\u1ea3 n\u0103ng khu\u1ebfch \u0111\u1ea1i t\u00edn hi\u1ec7u ph\u1ea3n x\u1ea1 v\u00e0 chuy\u1ec3n \u0111\u1ed5i t\u1ea7n s\u1ed1 trong d\u1ea3i t\u1ea7n 9,2\u20139,6 GHz, cung c\u1ea5p c\u00f4ng su\u1ea5t \u0111\u1ea7u ra l\u00ean \u0111\u1ebfn 8W v\u1edbi h\u1ec7 s\u1ed1 nhi\u1ec5u d\u01b0\u1edbi 3,2 dB.<\/p>\n\n\n\n
V\u1ec1 m\u1eb7t \u0111o l\u01b0\u1eddng c\u00f4ng su\u1ea5t v\u00e0 t\u1ed5ng h\u1ee3p t\u00edn hi\u1ec7u, m\u00e1y \u0111o c\u00f4ng su\u1ea5t vi s\u00f3ng c\u00f3 d\u1ea3i t\u1ea7n t\u1eeb 0,045 \u0111\u1ebfn 170 GHz, cho ph\u00e9p \u0111o c\u1ea3 t\u00edn hi\u1ec7u li\u00ean t\u1ee5c (CW) v\u00e0 t\u00edn hi\u1ec7u xung v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c cao. C\u00e1c b\u1ed9 t\u1ed5ng h\u1ee3p v\u00e0 t\u1ea1o t\u00edn hi\u1ec7u cung c\u1ea5p dao \u0111\u1ed9ng vi s\u00f3ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf AM\/FM ho\u1eb7c kh\u00f4ng \u0111i\u1ec1u ch\u1ebf, h\u1ed7 tr\u1ee3 k\u1ebft n\u1ed1i qua USB, RS-232 v\u00e0 Ethernet, gi\u00fap ch\u00fang ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng th\u1eed nghi\u1ec7m trong ph\u00f2ng th\u00ed nghi\u1ec7m, g\u1ee1 l\u1ed7i thi\u1ebft b\u1ecb v\u00e0 t\u00edch h\u1ee3p v\u00e0o d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n
Nh\u00ecn chung, gi\u1ea3i ph\u00e1p n\u00e0y k\u1ebft h\u1ee3p kh\u1ea3 n\u0103ng truy\u1ec1n th\u00f4ng v\u1ec7 tinh m\u1ea1nh m\u1ebd v\u1edbi c\u00e1c ch\u1ee9c n\u0103ng \u0111o l\u01b0\u1eddng s\u00f3ng milimet ti\u00ean ti\u1ebfn. V\u1ec1 m\u1eb7t truy\u1ec1n th\u00f4ng, gi\u1ea3i ph\u00e1p n\u00e0y \u0111\u1ea3m b\u1ea3o c\u00e1c k\u1ebft n\u1ed1i v\u1ec7 tinh t\u1ed1c \u0111\u1ed9 cao, \u1ed5n \u0111\u1ecbnh v\u00e0 c\u00f3 \u0111\u1ed9 tr\u1ec5 th\u1ea5p; v\u1ec1 m\u1eb7t \u0111o l\u01b0\u1eddng, gi\u1ea3i ph\u00e1p n\u00e0y cung c\u1ea5p m\u1ed9t n\u1ec1n t\u1ea3ng th\u1eed nghi\u1ec7m vi s\u00f3ng to\u00e0n di\u1ec7n v\u00e0 c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao. T\u00ednh linh ho\u1ea1t c\u1ee7a gi\u1ea3i ph\u00e1p n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd trong c\u00e1c l\u0129nh v\u1ef1c ph\u00e1t thanh truy\u1ec1n h\u00ecnh, truy\u1ec1n th\u00f4ng qu\u1ed1c ph\u00f2ng, \u0111\u1ecbnh v\u1ecb radar, k\u1ef9 thu\u1eadt \u0111i\u1ec7n t\u1eed v\u00e0 nghi\u00ean c\u1ee9u khoa h\u1ecdc.<\/p>\n\n\n\n
\u01afu \u0111i\u1ec3m: D\u1ea3i t\u1ea7n s\u1ed1 r\u1ed9ng v\u1edbi chi ph\u00ed th\u1ea5p h\u01a1n so v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m n\u01b0\u1edbc ngo\u00e0i c\u00f9ng lo\u1ea1i.<\/p>\n\n\n\n
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