一种直升机载X/Ka双频段雷达共口径天线  

An X-band and Ka-band Common-aperture Antenna for Helicopter-borne Weather Radar and Collision Avoidance Radar

作　　者：官正涛[1] 

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电讯技术》2013年第6期782-785,共4页Telecommunication Engineering

基　　金：中国电子科技集团公司第十研究所基础技术基金项目(H10001.5)~~

摘　　要：提出一种偏照馈电的X/Ka双频段极化扭转式卡塞格伦天线形式,实现了气象和防撞雷达系统共用一副天线,达到降低气象和防撞雷达设备体积和重量的目的。天线的试验结果表明,天线波束扫描范围内,在X频段,天线的副瓣电平优于-20.2 dB,天线效率优于44.8%;在Ka频段,天线的副瓣电平优于-20.1 dB,天线效率优于40.2%。该天线能兼顾满足气象和防撞雷达系统的技术要求,具有一定的工程应用价值。An offset feed X-band and Ka-band polarization torsion cassegrain antenna is proposed in this paper. To reduce the size and weight of helicopter-borne weather radar and collision avoidance radar, the dual-band common- aperture antenna is used in the two radar systems. The test results indicate that the side-lobe level of the antenna is no less than - 20.2 dB in X-band and - 20.6 dB in Ka-band, and that the efficiency of the antenna is no less than 44.8% in X-band and 40.2% in Ka-band in scan range of the beam.The antenna meets the requirement of beth weather radar and collision avoidance radar, and has engineering application value.

关 键 词：防撞雷达 气象雷达 共口径天线 极化扭转式卡塞格伦天线 

分 类 号：TN957.2[电子电信—信号与信息处理]