A frequency-reconfigurable microstrip antenna with constant dipole-like radiation patterns using single bias, triple varactor tuning with reduced complexity

Hossain, K., Sabapathy, T., Jusoh, M., Soh, P. J., Ahmad, R. B., Jais, M. I., Osman, M. N. and Abbasi, Q. H. (2022) A frequency-reconfigurable microstrip antenna with constant dipole-like radiation patterns using single bias, triple varactor tuning with reduced complexity. Wireless Personal Communications, 123(2), pp. 1003-1024. (doi: 10.1007/s11277-021-09167-8)

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Abstract

This work proposes a novel frequency-reconfigurable circular patch antenna incorporated with a rectangular slot and a narrow slot capable of producing constant dipole-like radiation patterns. The antenna compactness is achieved with the integration of the rectangular slot defected ground structure (DGS) on the ground. The proposed antenna is able to perform continuous frequency tuning between 1.91 and 2.77 GHz with a frequency ratio of 1.5:1, in addition to stable dipole-like radiation patterns. The resonant frequency of the antenna is controlled by tuning a simple DC biasing network that consists of three RF varactor diodes located on the narrow slot DGS. Implementing the DC biasing network at the narrow slot DGS while maintaining the large slot DGS helps the antenna miniaturization and maintains the constant dipole-like radiation pattern over all frequency tuning range. The results are validated via simulations and experimental validations in terms of reflection coefficients and the radiation patterns. Measurements indicated that an impedance bandwidth of 85 MHz is featured for each tuned frequency band, with dipole-like patterns and an average gain of 1.57 dBi.

Item Type:Articles
Additional Information:The author would like to acknowledge the support from the Short-Term Research Grant (Mentorship) under a grant number of 9001-00600 from the Universiti Malaysia Perlis.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Abbasi, Professor Qammer
Creator Roles:
Abbasi, Q. H.Conceptualization, Visualization
Authors: Hossain, K., Sabapathy, T., Jusoh, M., Soh, P. J., Ahmad, R. B., Jais, M. I., Osman, M. N., and Abbasi, Q. H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Wireless Personal Communications
Publisher:Springer
ISSN:0929-6212
ISSN (Online):1572-834X
Published Online:29 September 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Wireless Personal Communications 123(2): 1003-1024
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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