A High Performance Design and Implementation of a Transmitter Module of a Satellite Radio Repeater

[[abstract]]在任何收發機的設計裡面，RF頭端訊號是最重要的部份，它決定了收發機的使用頻道、距離、接收靈敏度與通訊品質等等。所以RF頭端模組的效能優劣是最大關鍵，例如採用了CE組態放大器可以得到較高的增益，或是選擇高頻特性較佳的電晶體（ft值大）的電晶體，再利用組抗匹配的原則使收發機整體的效能得以發揮最大。 本論文主要在探討利用傳統的無線通訊平台技術，來實現目前一個新興的系統－衛星廣播（Satellite Raido）系統。利用一般的無線通訊模組如LNA、PLL、PA、BPF、Transmission Line以及Antenna來完成發射系統，頻段則是設計在目前美國聯邦通訊委員會（FCC）於1992年規範的S頻段（2.3GHz）。在本論文所探討發射模組的系統中，則是以美國衛星廣播系統業者之ㄧ的XM Satellite Radio的系統為主所訂定的規格。本論文使用高頻調變技術，先利用天線將S頻段的訊號收到之後，之後使用Mixer降頻為915MHz，在使用PA將訊號增強，最後利用天線將訊號發送出去。[[abstract]]In any design which transmitter(receiver), the RF firings the part of signal is the most important part, it comes to a decision the usage channel, distance, sensitivity and communication quality of transmitter(receiver). So RF firings the part of signal the capability good and bad which module is the biggest key, for example adopted a CE configuration amplifier can get higher gain, or select the tansistor of the better (the ft value is big) of the high frequency characteristic, Make use of again a Impedance- Matching, making to transmitter(receiver) whole capability can develop biggest. This thesis primarily focuseds on inquiring in to make use of a traditional wireless communication a technique, carry out currently a newly Satellite Raido System. Make use of general wireless communication module,such as the LNA, PLL, PA, BPF, Transmission Line and the Antenna, to complete transmit system, the band of frequency then designs U.S.A. federal communications commission(FCC) in the S band of frequency of 1992 standard (2.3 GHzs) .Then regard the Radio system of the XM Satellite of American system operator's of the satellite broadcast as principle in this thesis the system inquiring into transmit module the specification established. This thesis uses a high frequency modulate technique, making use of first after aerial receive the signal of S band of frequency, use Mixer to Downconverter to 915MHz, use PA to strengthen signal, Make use of antenna to send out signal to go out finally