星载多频段双极化共馈微波辐射计天线

Microwave radiometer antenna with multi-frequency band and dual-polarization common feed on spacecrafts

作为“神州四号飞船”留轨段主载荷的多模态微波遥感系统中的微波辐射计天线是我国第一个工作到毫米波段的航天器天线 ,其工作频段跨越近 6个倍频程 ,采用了多频、双极化共馈源偏置抛物反射面天线系统 ,首次应用就获成功。本文着重阐述该微波辐射计天线的多频、双极化共馈系统设计和毫米波高精度反射面天线的实现。文中还介绍了空间反射面天线的计算机机电热一体化设计。

The microwave radiometer antenna of the multi-mode microwave remote sensing system loading on the 'SZ-4' spaceship, which is a offset parabolic reflector with the multi-frequency and dual-polarized common aperture-feed, is the first millimeter wave antenna successfully used on the spacecraft in China. Its operation frequency band leaps over nearly six octave bands. This paper presents the design of common aperture feed with multi-frequency and dual-polarization. High accurate reflector of the radiometer antenna has been described. The computer aided integrated design for multidiscipline (including mechanical, electrical and thermal design) of spacecraft antennas is also introduced.