A diplexer with direct coupled resonant junction

Abstract

Conventionally, diplexers are designed by connecting two filters of different frequencies using a transmission T‐line junction which acts as a distribution network serving the individual filters. Here, a novel diplexer has been proposed and designed to utilize a directly coupled resonator as the distribution network. The directly coupled resonator is designed using two square open‐loop resonators of the same resonant frequency of 1.95 GHz. Coupling of the two resonators is achieved using a λ/4 transmission line to directly couple them. This process made the resonator pair to possess a dual‐mode resonator function, resonating at 1.85 and 2.05 GHz. Two bandpass filters are then designed in the corresponding modes of the resonator pair with 5% fractional bandwidth and coupled accordingly. This technique allowed the resonator pair to contribute to the resonant poles of the diplexer while functioning as the distribution network.

Publication DOI: https://doi.org/10.1002/mop.32787
Divisions: College of Engineering & Physical Sciences
Additional Information: © 2021 The Authors. Microwave and Optical Technology Letters published by Wiley Periodicals LLC. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Uncontrolled Keywords: diplexer,direct coupled resonator,resonator pair,Electronic, Optical and Magnetic Materials,Atomic and Molecular Physics, and Optics,Condensed Matter Physics,Electrical and Electronic Engineering
Full Text Link:
Related URLs: https://onlinel ... .1002/mop.32787 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-06
Published Online Date: 2021-01-16
Accepted Date: 2021-01-02
Authors: Ogbodo, Eugene A.
Ngobigha, Felix
Obadiah Ali, Nyangwarimam
Atuba, Sunday

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