摘要
本文提出一种窄波束夹角的W波段双波束天线设计方法。通过调节卡塞格伦天线馈源对副面照射角的方法,来减小波束偏移角以实现窄波束夹角。文章分析了天线结构几何参数对波束偏移的影响,设计出口径mD为150mm的78GHz卡塞格伦双波束天线,3dB波束宽度约为1.64°,两波束夹角为2°。
A design of a W band dual beam angle antenna with a narrow angle between two beams is discussed.We adjust the illuminating angle of the feed source to the sub reflector to reduce the offset angle of the beam.Therefore,the angle between beams is diminished.The effect of the geometrical structure parameters on the beam offset angle is investigated.Finally,a Cassegrain antenna with a diameter of 150 mm is designed operating at 78 GHz frequency.The 3 dB beamwidth is about 1.64 degrees and the angle between two beams is 2 degrees.
出处
《微波学报》
CSCD
北大核心
2015年第S2期60-63,共4页
Journal of Microwaves
基金
国家自然科学基金(61301018)
