王进^1,,,
杜彪¹,
孙立杰¹,
解磊^{1, 2}
1.中国电子科技集团公司第五十四研究所 ??石家庄 ??050081
2.西安电子科技大学天线与微波技术重点实验室 ??西安 ??710071
基金项目:国家高技术研究发展计划(2014AA123601)，政府间国际科技创新合作重点专项(2016YFE0100100)

详细信息

作者简介:王进：男，1983年生，博士生，高级工程师，研究方向为微波无源器件、天线馈电网络与馈源技术
杜彪：男，1962年生，博士生导师，研究员，研究方向为反射面天线和高效率馈源、阵列天线和超材料天线等
孙立杰：男，1985年生，工程师，研究方向为微波无源器件、天线馈电网络
解磊：男，1985年生，博士生，研究方向为卫星通信天线与馈源技术

通讯作者:王进　15831969575@139.com

中图分类号:TN821

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出版历程

收稿日期:2018-05-04
修回日期:2018-10-10
网络出版日期:2018-11-01
刊出日期:2019-03-01

Design of Wideband High Performance Quad-ridge Waveguide Polarizer

Jin WANG^1,,,
Biao DU¹,
Lijie SUN¹,
Lei XIE^{1, 2}
1. The 54th Research Institute of CETC, Shijiazhuang 050081, China
2. Science and Technology on Antenna and Microwave Laboratory, Xidian University, Xi’an 710071, China
Funds:The National High Technology Research and Development Program of China (2014AA123601), The Bilateral Inter-Governmental Science and Technology Cooperation Proposal of China (2016YFE0100100)


摘要
摘要:在射电望远镜和卫星通信天线中，圆极化器是关键部件之一。传统圆极化器在保证0.75 dB轴比时的相对带宽最多为41%，无法满足日益增长的宽频带应用需求。该文利用四脊波导的宽带特性，通过采用具有不同尺寸的水平脊和垂直脊，使四脊波导两个正交主模的相位常数不同，来实现宽带移相特性，并给出了一种宽带四脊波导圆极化器的设计方法。按照这一方法，设计了一款宽带C波段圆极化器，工作带宽为3.625～7.025 GHz，相对带宽64%。该文还研究了圆极化器主要参数变化对其性能的影响，加工并实测了一个圆极化器样机。实测结果显示出，该圆极化器两个正交极化的反射损耗均小于–21 dB，相差90°±3.8°，相应的轴比小于0.6 dB。测试与仿真结果吻合良好，证明了分析与设计方法的正确性。
关键词:天线/
圆极化器/
宽频带/
四脊波导/
敏感性分析
Abstract:Circular polarizer is a key component in feed systems with circular polarization in radio astronomy telescope and satellite communication antennas. Conventional polarizers are capable of operating over a maximum bandwidth of 40% with an axial ratio value of 0.75 dB, which is unable to meet the growing demand for wide band applications. In this paper, the design of the wide band quad ridges waveguide polarizer is introduced, and the relationship between the phase constants of two orthogonal principal modes is analyzed. The broadband phase shift characteristics are achieved by employing different horizontal and vertical ridges dimensions. Based on this method, a C-Band polarizer is designed, which operates at 3.625～7.025 GHz, 64% bandwidth. The effects of main parameters on the polarizer performances are studied. A prototype of the polarizer is developed. The measurements of the prototype show that return losses are less than –21 dB for two orthogonal polarizations and the phase difference is 90°±3.8°, the corresponding axial ratio is less than 0.6 dB. Measured and simulated results show good agreements, thus validating the analysis and design methods.
Key words:Antenna/
Circular polarizer/
Wideband/
Quad-ridge waveguide/
Sensitivity analysis



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