Aspects of efficiency enhancement in reflectarrays with analytical investigation and accurate measurement

Jamaluddin, Mohd Haizal and Che Seman, Fauziahanim and Dahri, Muhammad Hashim and Abbasi, Muhammad Inam and Sallehuddin, Nur Fazreen and Ashyap, Adel Yahya Isa and Kamarudin, Muhammad Ramlee (2020) Aspects of efficiency enhancement in reflectarrays with analytical investigation and accurate measurement. Electronics, 9 (11). pp. 1-26. ISSN 2079-9292

Text ASPECT ELECTRONICS-09-01887 (2).PDF Download (6MB)

Abstract

This paper presents a thorough review of the techniques involved in the enhancement of the efficiency performance of the reflectarray antenna. The effect of the selection of a suitable patch element or a proper feeding mechanism on efficiency improvement is studied in detail. Reflectarray loss quantification is examined in relation to the design techniques involved in the efficiency improvement. A low loss patch element with a wide reflection phase range and a properly illuminated reflectarray aperture are supposed to offer high efficiency performance. Additionally, the placement, the orientation and the position of a patch element on the reflectarray surface can also affect its efficiency performance. Mathematical equations were developed to estimate the efficiencies of circular and square aperture reflectarray antennas by considering their feed footprints. Moreover, a step by step practical method of predicting and measuring the total efficiency of a reflectarray antenna is presented. The two selected apertures of the reflectarray consisting of the square patch element configuration are fabricated and measured at a frequency of 26 GHz. Their measured efficiencies have been estimated using the derived equations, and the results were compared and validated using the efficiencies obtained by the conventional gain-directivity relation.

Item Type:	Article
Uncontrolled Keywords:	Aperture efficiency, Circular aperture, Feed footprint, Reflectarrays, Square aperture, Total efficiency
Divisions:	Faculty of Electrical and Electronic Engineering Technology
Depositing User:	F Haslinda Harun
Date Deposited:	03 Sep 2021 17:09
Last Modified:	25 May 2023 14:51
URI:	http://eprints.utem.edu.my/id/eprint/25267
Statistic Details:	View Download Statistic

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