Suspended Contactless Low Passive Intermodulation Transition of Waveguide Flange

被引：0
|
作者：
Chen X. [1 ,2 ]
Shuang L. [2 ]
Sun D. [3 ]
Cui W. [2 ]
He Y. [1 ]
机构：
[1] School of Microelectronics, Xi'an Jiaotong University, Xi'an
[2] China Academy of Space Technology (Xi'an), Xi'an
[3] School of Physics and Optoelectronic Engineering, Xidian University, Xi'an
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2020年 / 54卷 / 05期
关键词：
Contactless; Electromagnetic band gap; Passive intermodulation; Waveguide flange;
D O I：
10.7652/xjtuxb202005016
中图分类号：
学科分类号：
摘要：
In high power satellite microwave systems, waveguide flange has serious passive intermodulation (PIM) problem because of metallic contact nonlinearity. To solve this problem, a novel method of suspended contactless low PIM transition is proposed. Double-sided contactless transition structure is constructed between traditional waveguide flanges using suspended periodic bed of nails. Contactless electromagnetic band gap (EBG) can be formed between waveguide flanges under proper size condition, and the electromagnetic field is confined to the waveguide by stop band of the EBG structure and propagates normally along the waveguide; meanwhile, a kind of contactless and compact connection is formed between waveguide flanges. By using this method, the metallic contact nonlinearity of waveguide flange can be completely eliminated, PIM is therefore significantly suppressed. A Ku band flange prototype is designed for verification. Over the operating frequency range from 10 to 15 GHz, the measured insertion loss is less than 0.08 dB, the return loss is better than 20 dB. When connected by the flange prototype, the PIM level of traditional waveguide flange connection is significantly reduced, with a maximum suppression beyond 50 dB and an average suppression better than 25 dB, indicating stable low PIM performance is achieved. © 2020, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
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页码：117 / 123
页数：6
相关论文
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