毫米波注鎖式四倍頻器及應用於衛星直播系統之低雜訊降頻器

Abstract

本篇論文主要分為三大部分，第一部分是利用穩懋0.15μm pHEMT製程完成一個使用交錯耦合電路架構之注鎖式四倍頻器，採用次諧波訊號鎖頻方式將輸出訊號雙推至28∼30GHz，相位雜訊也因鎖頻而提升，又結合緩衝放大器使功率增大。 第二部分採用pHEMT製程完成一個應用在衛星直播系統之低雜訊降頻器，射頻頻帶為10.6~11.7GHz，中頻為0.85~1.95GHz，各使用一級低雜訊放大器、混頻器和中頻放大器，達到32dB的轉換增益，2dB的雜訊指數，且利用pHEMT自偏壓的方法，達到全正壓操作下的用途。 第三部分為使用CMOS 0.18μm製程2.4GHz具主動濾波式之低雜訊放大器，使用主動式電感的高Q值特性，將帶外零點加深，不僅是將射頻訊號處理更為乾淨，主動電感的面積小，也是一大優勢。

This thesis is divided into three parts. The first is an injection-locked quadruple using cross couple pair topology in WIN 0.15 μm pseudomorphic high electron-mobility transistor (pHEMT) process. Output power can be push-push to 28~30GHz by sub-harmonic injection, thus, phase noise can be improved, and then in order to high output power we combine buffer amplifier at behind. The second is a low noise block down-converter for DBS application in WIN 0.15μm pHEMT process. RF frequency band is 10.6~11.7GHz, IF band is 0.85~1.95GHz. It consists of one stage low noise amplifier、mixer and IF amplifier. Conversion gain is 32dB and noise figure is 2dB. This topology bias is all positive by self-bias method. The third is a 2.4GHz low noise amplifier with an active filter in CMOS 0.18μm process. In order to make sharp the out of band of transmission zeros by using high quality factor of an active inductor. It also make RF signal purer and another advantage is a small size of active inductor.