Cover
Vol. 21 No. 1 (2025)

Published: September 19, 2025

Pages: 162-167

Original Article

Design of Dual-Passband Microstrip Filtering Antenna Using Dual-Mode Closed Loop Resonators and Defected Ground Structure

Mohammed K. Alkhafaji 1 Mohammed Al-Momin
1Southern Technical University (STU), Basra Engineering Technical College (BETC), Iraq
History
  • Received: September 8, 2023
  • Revised: December 21, 2023
  • Accepted: December 28, 2023
  • Available Online: December 27, 2024
DOI

https://doi.org/10.37917/ijeee.21.1.16

Abstract

This paper presents a new microstrip dual-mode closed-loop resonator (DMCLR) that is used to design lower insertion loss and better transmission dual-passband filtering antenna. The dual passband center frequencies of the presented filtering antenna are located at foI=5.52 GHz and foII= 6.65 GHz. The presented dual-mode, dual-passband microstrip filtering antenna results are simulated and optimized by using Computer Simulation Technology (CST) software and defected ground structure technique. Three modes of dual-mode resonators have been utilized to design the dual- passband microstrip filtering antenna and compare their results. The presented dual-mode, dual-passband microstrip filtering antenna is established on FR-4 epoxy dielectric material which has a relative permittivity εr= 4.3 which has height thickness h = 1.6 mm and loss tangent tan δ=0.002. Defected Ground Structure (DGS) technique has been utilized to improve the performance of the presented dual-mode, dual-passband microstrip filtering antenna.

Keywords

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