Ku波段單脈衝式天線追蹤器之研製

Abstract

Ku波段單脈衝式天線追蹤器之研製 本論文 旨在研製 ku 波段 12 GHz 單脈衝式天線追蹤器的四象限比較器. 他是 由四個微波條帶式耦合器所組成.可產生的加成,高低誤差,方位誤差信號 達到對目標追蹤之目的. 此研製利用 ku-Band 波導管陣列天線,天線 的元素距離約1.6倍波長,經過 比較器運算得到了加成與誤差訊號.其半 功率波束寬度為18度,其旁波瓣小於 -12.8dB,零位深度小於-13.4dB.量 測結果與預測相吻合. The Fabrication of Ku-Band Monopulse Antenna Tracker In this thesis,the four-quadrant monopulse antenna tracker for ku- Band is design. The tracker consists of four feeds and comparator. The feeder forms an array separated by 1.6 wavelength in E-plane and 1.6 wavelength in H-plane. The comparator consists of four micorstrip branch -line couplers. Using this comparator , we can get the signals of sum , elevation and azimuth which enable the purpose of object tracking. The far field pattern of this antenna array has half power beamwidth about 18, sidelobe below -12.8 dB,and null -13dB ; those are good agree- ment with theoretical predictions.