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High-isolation diplexer based on dual-mode substrate integrated waveguide resonator

Published online by Cambridge University Press:  24 October 2019

Kaijun Song ,
Mou Luo Open the ORCID record for Mou Luo [Opens in a new window] ,
Cuilin Zhong  and
Yuxuan Chen
Kaijun Song
Affiliation:
The EHF Key Laboratory of Science, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
Mou Luo*
Affiliation:
The EHF Key Laboratory of Science, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
Cuilin Zhong
Affiliation:
The Shen Zhen Research Institute of Zhe Jiang University and Shen Zhen City Jiang Bo Chuang Xing Electronic Co. LD, Shen Zhen, 518000, China
Yuxuan Chen
Affiliation:
The EHF Key Laboratory of Science, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
*
Author for correspondence: Mou Luo, E-mail: [email protected]
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Abstract

A high-isolation diplexer based on a dual-mode substrate integrated waveguide (SIW) resonator is proposed in this paper. Based on the theory of the dual-mode resonator, the miniaturized diplexers are designed by using the SIW dual-mode resonators. The superior isolation of the diplexers is obtained because the two operating modes of the dual-mode SIW resonators are not directly coupled and there is no interference with each other. In order to further improve the isolation of the circuit, the number of the order of the diplexer is added. Equivalent circuits are given to analyze and design the dual-mode high-isolation diplexers. Detailed analyses are given according to the equivalent circuits. The dual-mode third-order and fourth-order diplexers are designed and fabricated. The measured results agree well with the simulated ones. The total sizes of the fabricated third-order and fourth-order diplexers are 1.78λg × 2.64λg and 1.79λg × 3.63λg, respectively.

Keywords

High isolationsubstrate integrated waveguidediplexerdual-mode resonator
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 12 , Issue 4 , May 2020 , pp. 288 - 292
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019

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