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Design and analysis of single layer Ku/K band integrated element reflectarray antenna

Published online by Cambridge University Press:  20 March 2023

Kavitha Narayanasamy Open the ORCID record for Kavitha Narayanasamy [Opens in a new window] ,
Gulam Nabi Alsath Mohammed  and
Kirubaveni Savarimuthu Open the ORCID record for Kirubaveni Savarimuthu [Opens in a new window]
Kavitha Narayanasamy*
Affiliation:
Department of Electronics and Communication Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Tamil Nadu 603110, India
Gulam Nabi Alsath Mohammed
Affiliation:
Department of Electronics and Communication Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Tamil Nadu 603110, India
Kirubaveni Savarimuthu
Affiliation:
Department of Electronics and Communication Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Tamil Nadu 603110, India
*
Author for correspondence: Kavitha Narayanasamy, E-mail: kavithan@ssn.edu.in
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Abstract

A linearly polarized dual band reflectarray (RA) antenna designed, fabricated, and tested to operate in the Ku and K band frequencies is reported in this paper. The 24 × 24 cm2 size RA is developed using 1058 integrated elements etched over a 0.275 mm thick Rogers RT5870 substrate. The integrated elements include concentric circular rings distributed co-centric with the source and the Malta cross elements distributed offset from the source. The distribution of these elements is done based on the 590 and 360° phase change observed at 14.25 (Ku) and 22.5 (K) GHz by varying the size of the circular rings and the Malta cross respectively. The designed RA offers a simulated gain of 28.62 dBi at 14.25 GHz and 26.92 dBi at 22.5 GHz. These results are validated experimentally using the fabricated prototype. A measured peak gain of 28 and 26.4 dBi are observed with sidelobe levels (SLL) of −21 and −11 dB at 14.25 and 22.5 GHz respectively. The cross-polarization levels measured at the resonant frequencies are <−31 and <−28 dB. The proposed dual-band RA covers the entire Ku band uplink frequencies utilized for fixed satellite services and the K band downlink frequencies useful for earth exploration satellite services.

Keywords

Dual-bandfrequency ratioKu/K bandreflectarraysatellite communication
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Special Issue 8: EuCAP 2022 Special Issue , October 2023 , pp. 1424 - 1433
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Copyright
© The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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