Compact Multilayer Substrate Integrated Waveguide Dual-band Filtering Rat-race Coupler Based on Fan-shaped Cavities

Authors

  • Zhigang Zhang Fundamental Science on Extreme High Frequency Key Laboratory University of Electronic Science and Technology of China, Chengdu 611731, China
  • Yong Fan Fundamental Science on Extreme High Frequency Key Laboratory University of Electronic Science and Technology of China, Chengdu 611731, China
  • Yujian Cheng Fundamental Science on Extreme High Frequency Key Laboratory University of Electronic Science and Technology of China, Chengdu 611731, China
  • Yonghong Zhang Fundamental Science on Extreme High Frequency Key Laboratory University of Electronic Science and Technology of China, Chengdu 611731, China

Keywords:

Dual-band, filtering rat-race coupler, multilayer, substrate integrated fan-shaped cavity (SIFC)

Abstract

A new type of multilayer dual-band filtering rat-race coupler based on fan shaped substrate integrated waveguide (SIW) cavity is first proposed in this paper. Resonant frequencies of SIW fan-shaped cavity (SIFC) have been derived to construct a resonant cell. Magnetic and electric coupling between SIFCs are realized through multiple rectangular and circular slots located on metal layer, respectively. Specifically, the multiple rectangular slots are beneficial to increase coupling bandwidth and achieve better amplitude and phase balance. Moreover, the bandwidth ratio and center frequency of two pass-bands can be flexibly controlled by adjusting the size of band-stop resonators. The detailed analysis and the design method based on coupling matrix have been introduced to realize a dual-band filtering rat-race coupler. The new type of component should be able to provide at least three functions simultaneously, including in-phase and out-ofphase power dividing, filtering, and dual-band operation. Compared with other filtering couplers, the proposed design exhibits good dual-band filtering responses, high Q factor, better isolation, amplitude balance, as well as 0° and 180° phase differences.

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Published

2020-03-01

How to Cite

[1]
Zhigang Zhang, Yong Fan, Yujian Cheng, and Yonghong Zhang, “Compact Multilayer Substrate Integrated Waveguide Dual-band Filtering Rat-race Coupler Based on Fan-shaped Cavities”, ACES Journal, vol. 35, no. 3, pp. 344–353, Mar. 2020.

Issue

2020: Vol 35 Iss 3

Section

Articles