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Wideband millimeter-wave reflectarray antenna with reduced cross-polarization

Published online by Cambridge University Press:  16 February 2024

Vidhyashree Sathyanarayanan Open the ORCID record for Vidhyashree Sathyanarayanan [Opens in a new window] ,
Gulam Nabi Alsath Mohammed ,
Kirubaveni Savarimuthu  and
Malathi Kanagasabai
Vidhyashree Sathyanarayanan*
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India
Gulam Nabi Alsath Mohammed
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India
Kirubaveni Savarimuthu
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India
Malathi Kanagasabai
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India
*
Corresponding author: Vidhyashree Sathyanarayanan; Email: vidhyashreesathyanarayanan@gmail.com
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Abstract

A novel wideband reflectarray antenna (RA) is designed for 5G millimeter (mm) wave communications in the frequency range of 26.5–36 GHz. The proposed unit cell is constructed using a grid periodicity of 0.52${{\lambda }_0}{ }$ that offers 636° phase change through phase delay lines (PDLs) (${{\theta }_{\text{s}}}$). These PDLs are attached to the outer end of the unit cell comprising semi-circular rings. Bandwidth enhancement is achieved by incorporating a corrugated slot technique and a suitable air gap beneath the substrate. The proposed center-fed reflectarray is composed of 513 elements distributed in a circular aperture (13.46${{\lambda }_0}$). Using mirror-symmetrical distribution of the unit cells, a cross-polarization reduction as low as −50 dB is realized. At 30 GHz, RA has a measured peak gain of 28.2 dBi, a sidelobe level of −14.3 dB, and an aperture efficiency of 31.4%. The prototype antenna is fabricated, and the simulation results are experimentally validated. The measured 1-dB and 3-dB gain bandwidths of the proposed reflectarray antenna are 31.3% and 41.6%, respectively. The proposed broadband reflectarray can be a potential choice for inter-satellite services like inter-satellite networking/satellite positioning and control; fixed satellite services such as GPS satellite synchronization and data direct to home TV; and satellite position fixing.

Keywords

5G antennasArray antennasreflectarray antennas
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 9
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with the European Microwave Association

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