红外与毫米波学报2019，Vol.38Issue(1)：74-78,5.DOI:10.11972/j.issn.1001-9014.2019.01.013
W波段双极化单脉冲天线设计
Design of dual-polarized monopulse antenna at W-band
摘要
Abstract
In order to detect the polarization properties of the target, a dual-polarized monopulse Cassegrain antenna at W-band is proposed. The antenna is composed of the main-reflector, the sub-reflector, the feed horns, the orthomode transducer, and the sum-differential network. The aperture diameter of the antenna is 137 mm, the feed contains five horns, the orthomode transducer is designed using the tapered waveguide, and the sum-differential network is realized by the planer coupler. The feed horns, orthomode transducer, and sum-differential network are integrated designed to reduce the insertion loss and compress the size of the antenna. The measured results showthat the impedance bandwidth of the antenna is about 3. 7 GHz, the polarization isolation is greater than 35 dB, the maximal gain of the sum beam is about 37. 9 dBi, the sidelobe level is below-15 dB, and the null depth of the differential beam is better than-25 dB. The antenna shows good dual-polarized monopulse performance at W-band.关键词
毫米波/单脉冲/双极化/卡塞格伦天线Key words
millimeter wave/monopulse/dual-polarized/Cassegrain antenna分类
信息技术与安全科学引用本文复制引用
孟洪福,陈阳,窦文斌..W波段双极化单脉冲天线设计[J].红外与毫米波学报,2019,38(1):74-78,5.基金项目
国家自然科学基金(61671146,61101020) （61671146,61101020）
