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Ultra-wideband elliptical patch antenna for microwave imaging of wood

Published online by Cambridge University Press:  27 May 2019

Tale Saeidi*
Affiliation:
Dept. of Electrical and Electronics Engineering, Universiti Teknologi Petronas, Tronoh, Perak, Malaysia
Idris Ismail
Affiliation:
Dept. of Electrical and Electronics Engineering, Universiti Teknologi Petronas, Tronoh, Perak, Malaysia
Wong Peng Wen
Affiliation:
Dept. of Electrical and Electronics Engineering, Universiti Teknologi Petronas, Tronoh, Perak, Malaysia
Adam R. H. Alhawari
Affiliation:
Dept. Electrical Engineering, College of Engineering, Najran University, Saudi Arabia
*
Author for correspondence: Tale Saeidi, E-mail: gs32772@gmail.com

Abstract

This paper presents the design of an elliptical shape ultra-wide band antenna for imaging of wood. The antenna is constructed comprising an elliptical shape of patch loaded by a stub to resonate at lower bands, strip loading at the back, and chamfered ground. Despite having miniaturized dimensions of 20 mm × 20 mm, the proposed antenna shows better results compared to recent studies. The simulation results depict a good ultra-wide bandwidth from 2.68 to 16 GHz, and 18.2–20 GHz. Besides, the proposed antenna has two low-frequency bands at 0.89–0.92 and 1.52–1.62 GHz, maximum gain of 5.48 dB, and maximum directivity of 6.9 dBi. The measurement outcomes are performed in air, plywood, and high-density wood and show a good agreement with the simulated results done using electromagnetic simulator CST. In addition to that, the measurement results of S-parameters, transmitted and received signals show a good agreement with the simulated results. Besides, the measured results illustrate a good isolation and uniform illumination among arrays as well as the received signals' shapes do not change in different environments, but only the amplitude. Hence, the proposed antenna seems to be adequate for microwave imaging of wood.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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