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A wideband, single layer reflectarray antenna with cross loop and square ring slot loaded patch elements

Published online by Cambridge University Press:  18 March 2019

Veluchamy Lingasamy*
Affiliation:
Department of Electronics and Communication Engineering, SSN College of Engineering, Kalavakkam, India
Mohammed Gulam Nabi Alsath
Affiliation:
Department of Electronics and Communication Engineering, SSN College of Engineering, Kalavakkam, India
Krishnasamy T. Selvan
Affiliation:
Department of Electronics and Communication Engineering, SSN College of Engineering, Kalavakkam, India
Rajeev Jyoti
Affiliation:
Space Applications Centre (SAC), Indian Space Research Organization, Jodhpur Tekra, Ahmedabad-380015, Gujarat, India
*
Author for correspondence: Mohammed Gulam Nabi Alsath, E-mail: alsath@live.com

Abstract

This paper presents the design and analysis of a wideband X/Ku and Ku band reflectarray antenna. The proposed unit cell of the reflectarray antenna comprises a patch loaded with two distinct slots, viz. a square ring and a cross loop, printed on a low loss substrate, which is backed by a foam-loaded ground plane. The unit cell element offers a linear and large dynamic reflection phase range, which is achieved by optimizing the shape, location, and geometrical parameters of the two slots loaded on the patch. A 324 element microstrip reflectarray antenna of size 200 × 200 mm2 is constructed and analyzed for its radiation characteristics by simulation and measurement. The reflectarray offers a 3 dB gain bandwidth of 50.75% with the operating frequency range of 10–16.8 GHz. It offers a peak gain and aperture efficiency of 25.4 dB and 40% at 12.6 GHz, respectively. The cross-polarization level is below −40 dB over the entire operating frequency range.

Type
Antenna Design, Modelling and Measurements
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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