40 ~ 48 GHz 毫米波無線高畫質電視訊號接收系統

Abstract

近年來，人們對於視覺享受的要求越來越嚴格，一般傳統的 SDTV 已經無法滿足人們的需求，因此目前對於 HDTV 的發展可以是說日益蓬勃，加上液晶電視的普及，HDTV 可以說是慢慢會取代 SDTV 的位置。而無線通訊快速發展，科技業紛紛發展新的技術和產品，而 HDTV 也被注意到，開始有了透過無線傳輸的方式來傳送 HDTV 到各戶家庭。因此使用毫米波透過無線傳輸的方式來傳送 HDTV 的技術已經慢慢被開發研究。 本論文研究透過基本的毫米波無線高畫質電視的傳輸系統來進行實驗和實做測試。第一部份是對於使用在基頻的寬頻放大器設計，首先我們實做了一個應用在 0 ~ 1.5 GHz 的 IF 寬頻放大器，所使用的是 Avago 的 ATF-33143 擬高速電子遷移率電晶體，電路操作在 4 V 偏壓，以 FR - 4 印刷電路板當作載板，架構使用微帶線的負回授放大器的架構；設計增益為 17 dB，輸出和輸入回饋損失皆小於 -10 dB，利用此基頻的寬頻放大器將接收到的電視訊號放大並且還原。 第二部份則是探討應用在 40 ~ 48 GHz 的微化型接收器，使用穩懋半導體所研發的 0.15 μm Power pHEMT 的製程方式來製作此接收器，前級是一個低雜訊放大器（LNA），偏壓操作在 4 V；設計增益為 8 dB，輸入及輸出回饋損失皆小於 -10 dB，雜訊指數小於 4 dB；至於後級乃是一個混波器（Mixer），轉換增益為 - 3 dB，RF 輸入的回饋損失小於 -11 dB，LO 輸入的回饋損失則大致在 -12 dB，晶片實現後的大小為 1 x 1 mm2，可以節省掉許多不必要的面積以及花費。

In recent years, the demand that people enjoy for the vision is stricter and stricter, generally traditional SDTV has been unable to meet people’s demands, so the development of HDTV is flourishing day by day at present, add the popularization of the liquid crystal TV, HDTV will replace the position of SDTV. There is wireless communication to develop fast, there are developing new technology and products, and HDTV is noted, begin to have way to transmit through the wireless to every family. Use millimeter-wave is it transmit through way that wireless HDTV transmission technology is it research to develop already. The thesis studies to carry on the experiment and test through the basic mmw wireless HDTV transmission system. The first part is for used in baseband and designed the broadband amplifier, we have made one to apply to 0 ~ 1.5 GHz IF broadband amplifier at first, that use the Avago ATF-33143 pHEMT operating in 4 V , supply on FR-4 printed circuit board, the architecture of this circuit is feedback amplifier; the result of designing the gain is 17 dB with input and output return loss are all smaller than -10 dB, the TV signal utilizing this IF broadband amplifier to get receiving is amplified and restored. The second part of the thesis is apply during 40 ~ 48 GHz miniature receiver, using WIN 0.15 μm Power pHEMT semiconductor research to make this receiver. The first stage is a Low Noise Amplifier（LNA）, operating in 4 V; design the gain is 8 dB, input and output return loss are all smaller than - 10 dB, the noise figure is smaller than 4 dB; as for the second stage is a mixer, the conversion gain is - 3 dB, RF return loss is smaller than - 11 dB, and LO return loss is roughly in -12 dB, the chip size is realized in 1 x 1 mm2, that can lose a lot of unnecessary area and spend sparingly.