設計與整合多種天線應用於77GHz汽車防撞警示雷達系統之多波束多功能天線模組

Abstract

本論文將提出一個設計與整合應用於汽車防撞警示雷達且具多波束多功能之雙模式(Dual-Mode)天線開發，其分為長距模式(Long- Range Mode, LRM)和短距模式(Short-Range Mode, SRM)。長距模式使用頻段為76GHz到77GHz，提供本車道前方遠距離和方位的偵測；短距模式使用頻段為77GHz到81GHz，提供本車道近距離和大範圍角度的偵測。長距模式天線基本架構為透鏡天線(Lens Antenna)，為微帶貼片天線和透鏡所組成，可產生高增益、窄波束、且在偵測水平方向上主波束偏移正負5度共提供前方10度視角且對稱的輻射場型。而短距模式天線基本架構為天線陣列(Antenna Array)和洩漏波天線(Leaky-wave Antenna)所組成，在水平面上正負45度共90度的範圍裡產生五個不同角度的波束。

In this thesis, we introduce a design and integration of multibeam multifunction dual-mode antenna applied to vehicle collision warning radar system, which are Long Range Mode(LRM) and Short Range Mode(SRM). The bandwidth of Long Range Mode is from 76GHz to 77GHz, and it detects long range distance and angle from once own lane. The bandwidth of Short-Range Mode is from 77GHz to 81GHz, and it detects short range distance and wide angle of view from once own lane. The basic structure of Long-Range Mode antenna is lens antenna, which is comprised of microstrip patch antenna and lens, and it can generate high gain, narrow beam, and the main beams tilt ±5°, totally 10° angle of view on horizontal plane and the radiation pattern is symmetrical. Short-Range Mode antenna is comprised of antenna array and leaky-wave antenna, which can generate five different angle beams within ±45°, totally 90° angle of view on horizontal plane.