volume | PIER Journals

2017-02-22

Compact and Wide Stopband E-Plane Waveguide Diplexer Design

Mahdi Alibakhshi,

Dr. Mahdi Alibakhshi

Electrical & Computer Engineering Faculty

Semnan University

Iran

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Reza Bayderkhani,

Dr. Reza Bayderkhani

Electrical & Electronic Eng. Department

Tarbiat Modares University

Iran

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Majid Afsahi

Dr. Majid Afsahi

Electrical & Computer Engineering Faculty

Semnan University

Iran

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Progress In Electromagnetics Research Letters, Vol. 66, 59-64, 2017

doi:10.2528/PIERL17010605

Abstract

This paper presents the design of a compact E-plane waveguide diplexer with wide stopband characteristics of high rejection level. This is achieved by utilizing a unique E-plane waveguide filter comprising rectangular apertures located along the waveguide's E-plane. The upper and lower sections of the aperture in the septum insert have periodic comb-like ridges. The effect of the septum is (i) to slow the propagating wave that helps to reduce the filter's size, and (ii) widens its stopband property. Dimensions of the periodic ridges of the aperture enable the center frequency of the filter to be controlled without compromising its bandwidth. In addition, the proposed E-plane waveguide filter provides a high isolation between the two diplexer channels, which is necessary to prevent significant cross-talk between the channels. The performance of the proposed design was verified through measurements. There is excellent agreement between the simulated and experimental results.

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Mahdi Alibakhshi, Reza Bayderkhani, and Majid Afsahi, "Compact and Wide Stopband E-Plane Waveguide Diplexer Design," Progress In Electromagnetics Research Letters, Vol. 66, 59-64, 2017.
doi:10.2528/PIERL17010605

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