回授單向化功率放大器及其實現方法
  ‧ 專利名稱 迴授單向化功率放大器及其實現方法
  ‧ 專利證書號 I325222
7439802
7733173
  ‧ 專利權人 國立臺灣大學
  ‧ 專利國家
    (申請日)
中華民國 (2006/09/19)
美國 (2007/01/10)
美國 (2008/06/23)
 
  ‧ 發明人/PI 蔡作敏 ,GEORGE D. VENDELIN,王暉 ,
  ‧ 單位 電信工程學研究所
  ‧ 簡歷/Experience
技術摘要 / Our Technology:
一種回授單向化功率放大器及其實現方法,其係藉由新回授技術與裝置來使功率放大器之放大高頻訊號單向化並且讓輸出功率,功率增益以及阻抗匹配同時達到最佳值並同時增加系統的穩定性。此迴授放大器於功率電晶體的輸入端及輸出端並接一個廣義的多埠迴授電路。該廣義的多埠迴授電路接收放大高頻訊號並消除該放大高頻訊號之反向導納,以使輸出的放大高頻訊號導納值接近零以達單向化。此外,本發明之廣義的多埠迴授功率放大器和傳統串接架構功率放大器的不同之處在於功率電晶體地端直接連到系統地端,功率電晶體的散熱問題因而可以大幅改善。

A unilateral feedback power amplifier utilizes new feedback techniques and devices to make the amplified high-frequency signal unilateral, let the output power, power gain and impedance matching simultaneously accomplish the optimal values, and enhance the stability of the system. In this feedback amplifier, a generalized multi-port feedback circuit is in shunt with the input terminal and the output terminal of the power transistor. This generalized multi-port feedback circuit receives an amplified high-frequency signal and eliminates the reverse admittance of the amplified high-frequency signal to let the admittance value of the output amplified high-frequency signal approach zero so as to be unilateral. Moreover, the generalized multi-port feedback power amplifier differs from the conventional power amplifier of cascaded architecture in that the ground terminal of the power transistor is directly connected to the system ground. Therefore, the heat-radiating problem of the power transistor can be greatly improved.





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