Ku頻帶行動衛星通訊頻率合成器

Abstract

在本計畫中我們提出一13.2 GHz混成積體頻率合成器的設計、製造及測量 。此電路包含三大部分﹕電壓控制振盪器、鎖相迴路IC及迴路濾波器。在 此電路中我們以distributive的方式製作電壓控制振盪器﹐而採用集總元 件製作迴路濾波器。電壓控制振盪器成品的頻率範圍是在13.168 GHz 到13.216 GHz之間﹐其輸出功率在4dBm左右﹐在離載波頻率100MHz處的相 位雜訊為-69.09 dBc/Hz。整個電路模組面積為5.5*4.1平方公分。這個電 路的某些測量結果並不能令人滿意﹐我們將提出我們針對此結果曾嚐試過 的改進方法並提出一些可能的解決方式。 In this project, the design, fabrication, and measurement of a Ku-band frequency synthesizer for satellite communication is presented. The frequency synthesizer is fabricated by hybrid-MIC technique and it consists of three blocks: the VCO, the national LMX2330 synthesizer, and the loop filter. The VCO frequency range is from 13.168 GHz to 13.216 GHz. Its output power is about 4 dBm and its phase noise at 100MHz offset is -69.09 dBc/ Hz. The size of the frequency synthesizer is 5.5 4.1 cm2. The loop filter is implemented with passive components. A C language program is used to control the frequency switching. Some of our frequency synthesizer measurement data are not satisfactory compared to the specifications, in this report we will discuss the methods we have used to improve its performance and suggest some possible solutions.