Efficient and Accurate Analysis of a Substrate Integrated Waveguide (SIW) Rat-Race Coupler Excited by Four U-Shape Slot-Coupled Transitions

Authors

  • R. Dehdasht-Heydari Department of Electrical Engineering, Science and Research Branch Islamic Azad University, Tehran, Iran
  • K. Forooraghi Department of Electrical Engineering Tarbiat Modares University (TMU), Tehran, Iran
  • M. Naser-Moghadasi Department of Electrical Engineering, Science and Research Branch Islamic Azad University, Tehran, Iran

Keywords:

Boundary conditions, coaxial cables, Cylindrical Vector Waves (CVWs), Dyadic Green’s Functions (DGFs), rat-race (hybrid ring) coupler, Substrate Integrated Waveguide (SIW), transition, U-shape slots

Abstract

In this paper, the bandwidth of one SIW rat-race (hybrid ring) coupler has been increased up to 30% by four U-shape slot-coupled transitions without disadvantages due to transmission line loss, radiation and design complexity. The SIW coupler structure has been analyzed by the mode matching method that uses the cylindrical vector expansion to minimize computational time and memory occupation. Throughout 11-15 GHz bandwidth, return loss and isolation as well as phase differences in output ports have been presented. It is observed that the numerical results are in good agreement with simulation and experimental measurement.

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Published

2021-08-24

How to Cite

[1]
R. . Dehdasht-Heydari, K. . Forooraghi, and M. . Naser-Moghadasi, “Efficient and Accurate Analysis of a Substrate Integrated Waveguide (SIW) Rat-Race Coupler Excited by Four U-Shape Slot-Coupled Transitions”, ACES Journal, vol. 30, no. 01, pp. 42–49, Aug. 2021.

Issue

2015: Vol 30 Iss 1

Section

General Submission