24GHz連續波雷達系統設計與整合

Abstract

本篇論文在設計24GHz連續波雷達，包括12GHz放大器，利用最大增益匹配，其增益為13dB，而12GHz至24GHz之二倍頻器利用傳統的二分之波長短路支線與開路支線的架構，在輸入功率為5dB以下時有正的轉換增益，以及擁有傾斜場型的漏波天線天線陣列，利用單端饋入，其天線增益為15 dBi，傾斜角為60度(水平仰角為30度) ，半功率波束寬為15度，且在60度的平面有18度的半功率波束寬，最後於實驗室中實作並驗證其功能，再加入既有的震盪器以及混波器，進行整合。最後完成之連續波雷達其最大EIRP為23dBm，為驗證雷達的功能，於車機上安裝雷達並進行實驗，可以清楚的接收到目標物所反彈回的都卜勒信號。本篇論文將詳述放大器，被頻器以及天線的原理，以及電路的模擬與實作。

A 24GHz CW Radar has been demonstrated in this thesis. This radar consists of 12GHz Amplifier, 12GHz-24GHz frequency doubler and 24GHz leaky-wave antenna. Total CW radar has been integrated with rest two components, 12GHz DRO and 24GHz bypass mixer. 12GHz Amplifier has 13dB gain with maximum gain matching method. 12GHz-24GHz frequency doubler with open-short stub has positive conversion gain while input power is less than 5dBm. Leaky-wave antenna has 60 degree tiled-beam (30degree from horizontal plane), 15 dBi gain, 16 degree HPBW and 18 degree HPBW in the cut at 60 degree. Final version of CW radar has 23dBm EIRP. The function of CW radar is demonstrated indoors and outdoors. Principles, simulation and fabrication of circuits are described in this thesis.