太赫兹科学与电子信息学报2025，Vol.23Issue(10)：1038-1044,7.DOI:10.11805/TKYDA2024220
大口径正馈反射面天线赋形设计
Shaped design of large aperture front-fed reflector antenna
樊希媛 1李向芹 2杨雪霞 3于雨 2谢振超2
作者信息
- 1. 上海大学 通信与信息工程学院,上海 200444||上海航天电子技术研究所,上海 201109
- 2. 上海航天电子技术研究所,上海 201109
- 3. 上海大学 通信与信息工程学院,上海 200444
- 折叠
摘要
Abstract
To meet the quantitative application requirements,microwave radiometers are required to possess the high calibration accuracy while satisfying the high spatial resolution.The main beam efficiency directly affects the calibration accuracy of radiometers.Normal front-fed reflector antennas suffer from obstructions in the central area of the reflector,which leads to high sidelobes and low main beam efficiency.This paper introduces a novel front-fed reflector antenna structure that features a hole in the center of the main reflector and a set of shaped reflectors below the center hole to regulate the amplitude and phase of the antenna aperture field.Firstly,a front-fed Cassergrain antenna operating at 54 GHz and 183 GHz frequencies is designed.Secondly,a new mathematical model for calculating the antenna radiation pattern is established based on the relationship between the antenna aperture field distribution function and the radiation field.Using the geometric optics method,a pair of mirrors are shaped and optimized.Finally,the fabricated shaped reflectors are tested.The test results are validated through semi-physical simulations and the main beam efficiency reaches 90%.关键词
正馈反射面天线/主波束效率/几何光学法/大口径/电性能测试Key words
front-fed reflector antenna/main beam efficiency/geometric optics method/large aperture/electrical performance measurement分类
信息技术与安全科学引用本文复制引用
樊希媛,李向芹,杨雪霞,于雨,谢振超..大口径正馈反射面天线赋形设计[J].太赫兹科学与电子信息学报,2025,23(10):1038-1044,7.
