宽频带双极化低副瓣偏馈抛物面天线

A Broad Bandwidth Dual-polarization Low Side-lobe Offset Fed Paraboloidal Reflector Antenna

介绍了一种宽频带双极化低副瓣天线的设计、加工方法和测试结果。采用馈源偏置的方法来减小副瓣,采用波纹喇叭实现天线双极化的要求,并且采用双椭圆切割抛物面来增加天线的效率和减小方位主波束宽度。天线的理论分析与实验结果吻合较好,优于所需的技术指标要求。

An X-band broad bandwidth dual- polarization low side-lobe offset fed paraboloidal reflector antenna is described. The design of the antenna is emphasized. The error analysis and the manufacture are also involved, and experimental data are listed. The off-fed horn is used to decrease side lobe, the corrugated horn is adopted to achieve dual-polarization, and dual-elliptically cut parabolic reflector is applied to improve the azimuth aperture efficiency and narrow the azimuth beam width. The experiment result is consistent with the design, and is superior to the technical specification requirement.