A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics

This paper presents an efficient theoretical design approach of a very compact microstrip diplexer for modern wireless communication system applications. The proposed basic resonator is made of coupled lines, simple transmission line and a shunt stub. The coupled lines and transmission line make a...

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Main Authors: Abbas Rezaei, Salah I. Yahya
Format: Article
Language:English
Published: Koya University 2022-08-01
Series:ARO-The Scientific Journal of Koya University
Subjects:
Online Access:http://aro.koyauniversity.org/index.php/aro/article/view/999
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author Abbas Rezaei
Salah I. Yahya
author_facet Abbas Rezaei
Salah I. Yahya
author_sort Abbas Rezaei
collection DOAJ
description This paper presents an efficient theoretical design approach of a very compact microstrip diplexer for modern wireless communication system applications. The proposed basic resonator is made of coupled lines, simple transmission line and a shunt stub. The coupled lines and transmission line make a U-shape resonator while the shunt stub is loaded inside the U-shape cell to save the size significantly, where the overall size of the presented diplexer is only 0.008 λg2 . The configuration of this resonator is analyzed to increase intuitive understanding of the structure and easier optimization. The first and second resonance frequencies are f o1 = 895 MHz and f o2 = 2.2 GHz. Both channels have good properties so that the best simulated insertion loss at the first channel (0.075 dB) and the best simulated common port return losses at both channels (40.3 dB and 31.77 dB) are achieved. The presented diplexer can suppress the harmonics acceptably up to 3 GHz (3.3 fo1 ). Another feature is having 31% fractional bandwidth at the first channel.
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spelling doaj.art-e586747d36c9413890679194cae595f72023-08-02T09:20:38ZengKoya UniversityARO-The Scientific Journal of Koya University2410-93552307-549X2022-08-0110210.14500/aro.10999A New Design Approach for a Compact Microstrip Diplexer with Good Passband CharacteristicsAbbas Rezaei0Salah I. Yahya1Department of Electrical Engineering, Kermanshah University of Technology, Kermanshah, IranDepartment of Communication and Computer Engineering, Cihan University-Erbil, Erbil, Kurdistan region – F.R. Iraq. (2) Department of Software Engineering, Faculty of Engineering, Koya University, Koya KOY45, Kurdistan region – F.R. Iraq This paper presents an efficient theoretical design approach of a very compact microstrip diplexer for modern wireless communication system applications. The proposed basic resonator is made of coupled lines, simple transmission line and a shunt stub. The coupled lines and transmission line make a U-shape resonator while the shunt stub is loaded inside the U-shape cell to save the size significantly, where the overall size of the presented diplexer is only 0.008 λg2 . The configuration of this resonator is analyzed to increase intuitive understanding of the structure and easier optimization. The first and second resonance frequencies are f o1 = 895 MHz and f o2 = 2.2 GHz. Both channels have good properties so that the best simulated insertion loss at the first channel (0.075 dB) and the best simulated common port return losses at both channels (40.3 dB and 31.77 dB) are achieved. The presented diplexer can suppress the harmonics acceptably up to 3 GHz (3.3 fo1 ). Another feature is having 31% fractional bandwidth at the first channel. http://aro.koyauniversity.org/index.php/aro/article/view/999CompactDiplexerInsertion lossMicrostripResonatorReturn loss
spellingShingle Abbas Rezaei
Salah I. Yahya
A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics
ARO-The Scientific Journal of Koya University
Compact
Diplexer
Insertion loss
Microstrip
Resonator
Return loss
title A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics
title_full A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics
title_fullStr A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics
title_full_unstemmed A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics
title_short A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics
title_sort new design approach for a compact microstrip diplexer with good passband characteristics
topic Compact
Diplexer
Insertion loss
Microstrip
Resonator
Return loss
url http://aro.koyauniversity.org/index.php/aro/article/view/999
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