應用於24GHz多發多收雷達系統之天線

Abstract

本論文提出三種雷達架構之天線設計，其天線操作頻段皆符合24.05~24.25GHz之需求。其中二發一收的天線架構，有高整合度、體積小的優勢，可應用於盲點警示偵測。一發二收的架構，天線使用雙層機板設計，容易與電路整合，並採用兩個反向連通柱(via)饋入，增加輻射場型的頻寬，可應用於前視短距偵測。一發一收的架構，天線設計具有高增益、窄波束、低旁波束等級(Sidelobe level)，並使用平衡式饋入達到較寬的頻寬，可應用於前視遠距偵測。

In this thesis, 3 different kinds of antennas for 24GHz radar systems are proposed, of which the operation band is from 24.05 GHz to 24.25 GHz. The first design is for blind spot detection radars due to its highly integration and low-profile structure. The second type of antenna is fabricated in a 2-layer structure, which is low profile, low cost and easy integration. Two out-of-phase vias are used as the antenna feed, hence increases the bandwidth of the radiation pattern. Therefore, it can be used in short range detection radars. In the last design, a balanced feed is used in order to improve the impedance bandwidth. With high gain, narrow-beamwidth, and low-sidelobe-level, this antenna is used in long-range-radar applications.