Design of wideband quad-ridged waveguide orthomode transducer at L-band

被引：0
作者：
Fan J. [1 ,2 ,3 ]
Yan Y. [3 ,4 ]
Jin C. [1 ,2 ]
Zhan D. [1 ,2 ]
Luo J. [3 ,5 ]
机构：
[1] Department of FAST, National Astronomy Observatory of China, Beijing
[2] Key Laboratory of Radio Astronomy, Chinese Academy of Sciences
[3] University of Chinese Academy of Sciences, Beijing
[4] CAS Key Laboratory of Solar Activity National Astronomical Observatories of China, Beijing
[5] Key Laboratory of High Power Microwave Source and Technologies, Institute of Electronics, Chinese Academy of Sciences, Beijing
来源：
Progress In Electromagnetics Research C | 2017年 / 72卷
基金：
中国国家自然科学基金;
关键词：
Cross-polarized - Design Principles - Five-hundred meter aperture spherical radio telescopes - Isolation level - Measured results - Ortho-mode transducers - Quad-ridged - Wideband performance;
D O I：
10.2528/PIERC17010802
中图分类号：
学科分类号：
摘要：
In this paper, an L-band wideband quad-ridged waveguide orthomode transducer (OMT) for the Five hundred meter Aperture Spherical radio Telescope (FAST) is presented with a simple design principle. By designing two critical parts of the OMT separately and introducing matching rings into two orthogonal probes, an improved wideband performance has been realized successfully. The OMT is designed to operate across the 0.95 GHz–1.9 GHz band, and the simulation shows a return loss better than −20 dB for both polarizations, cross-polarized isolation levels over 45 dB and insertion loss lower than 0.15 dB over the entire bandwidth. The measured results are in good agreement with the simulations. © 2017, Electromagnetics Academy. All rights reserved.
引用
收藏
页码：115 / 122
页数：7
相关论文
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