毫米波陣列耦合器及其於微帶天線陣列之應用

Abstract

本論文提出應用於77 GHz車用防撞警示雷達之縮小化長距天線設計，長距天線著重於前方本車道與相鄰車道的環境判斷，其操作頻段為76 GHz ~ 77 GHz，具有高增益、窄波束以及低旁波束等性質。為了達到面積縮小化，本論文提出一陣列耦合器的設計，使陣列天線可以達到最小的面積設計。天線設計方面採用微帶天線當輻射單元，具有成本低、體積小和易與電路整合之優點。為了易於系統整合與製程簡單，天線饋入方式採用邊緣饋入。

In this thesis, small-sized antenna arrays for 77GHz vehicle collision warning radar systems are designed. The long-range radar(LRR) is used to detect long-range targets on the same lane and others on the neighboring lane. The operating frequency of LRR is from 76 GHz to 77 GHz, hence antennas designed for this mode are highly directional with narrow beamwidth and preferably low side lobe level. In order to minimize antenna size, the use of an array coupler is proposed and developed in this thesis. Microstrip patch antenna is chosen as the radiating element, which is well known for low cost, small size and easy integration. The signal is fed from the edge of antenna arrays for easy integration and easy fabrication.