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CPW-fed printed tapered slot antenna loaded by a wideband stacked artificial magnetic conductor with a progressed performance

Published online by Cambridge University Press:  02 February 2022

Hossein Malekpoor Open the ORCID record for Hossein Malekpoor [Opens in a new window]  and
Mehdi Hamidkhani
Hossein Malekpoor*
Affiliation:
Department of Electrical Engineering, Faculty of Engineering, Arak University, Arak, 38156-8-8349, Iran
Mehdi Hamidkhani
Affiliation:
Department of Electrical Engineering, Dolatabad Branch, Islamic Azad University, Isfahan, Iran
*
Author for correspondence: Hossein Malekpoor, E-mail: h-malekpoor@araku.ac.ir
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Abstract

A low profile printed slot antenna (PSA) backed by broadband stacked artificial magnetic conductor (AMC) is introduced in this study. First, a suggested PSA with the radiating tapered slots excited by coplanar-waveguide (CPW) is used to expand the bandwidth in the measured range of 9.05–10.95 GHz (S11 ≤ −10 dB). Then, the suggested stacked AMC surface as the ground plane of the antenna is inserted into the PSA to gain improved radiation efficiency. The realized result from the PSA with the 11 × 17 stacked AMC array exhibits −10 dB measured impedance bandwidth from 6.97 to 13.34 GHz (62.73%). The suggested PSA with AMC compared to the PSA without AMC exhibits a size reduction of 52%, enhanced bandwidth of almost 44%, and excellent impedance matching with uni-directional radiation patterns. The novel AMC unit cell is realized based on the recognized method of stacked elements. The stacked AMC design operates at 10.63 GHz with an AMC bandwidth of 8–12.84 GHz (45.8%) for X-band operation. Besides, by introducing a specific method based on the reflection results of the equivalent waveguide feed, the number of AMC unit cells is investigated to obtain an optimal AMC array. In this approach, an equivalent waveguide feed corresponding to the center operating frequency is considered to choose the number of AMC array reflector.

Keywords

Artificial magnetic conductor (AMC)electromagnetic band gap (EBG)printed slot antennastacked AMCwideband AMC
Type
Metamaterials and Photonic Bandgap Structures
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Special Issue 1: EuCAP 2021 Special Issue , February 2023 , pp. 102 - 111
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Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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