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A rectangular slot antenna with perfectly conducting superstrate and reflector sheets for superior radiation in the 6–9 GHz band

Published online by Cambridge University Press:  16 April 2020

Ritish Kumar Open the ORCID record for Ritish Kumar [Opens in a new window]  and
A. V. Praveen Kumar
Ritish Kumar
Affiliation:
Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science (BITS Pilani), Pilani campus, Rajasthan-333031, India
A. V. Praveen Kumar*
Affiliation:
Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science (BITS Pilani), Pilani campus, Rajasthan-333031, India
*
Author for correspondence: A.V. Praveen Kumar, E-mail: praveen.kumar@pilani.bits-pilani.ac.in
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Abstract

This paper presents the design and analysis of a rectangular slot antenna for producing a directional radiation pattern over a wide bandwidth of 6–9 GHz. A basic wideband slot antenna is designed for the desired frequency band by microstrip offset feed technique. This antenna is then loaded with a superstrate and a reflector, both made of conducting sheets. Analogous to a three-element Yagi antenna, the superstrate enhances the boresight gain, while the reflector improves the front-to-back ratio (FBR) of the basic slot antenna. The antenna is optimized for superior wideband performance with boresight gain ≥5 dBi, peak cross-pol level ≤−10 dB and FBR ≥10 dB, over the −10 dB impedance band of 6–9 GHz, which in this paper is termed as the radiation bandwidth. Prototype measurement demonstrates a radiation bandwidth of 6.05–8.22 GHz (or 30.41%), which is in decent agreement with the simulation.

Keywords

Conducting superstratedirectional radiationmicrostrip slot antennaoffset feedradiation bandwidthreflector sheetwideband antenna
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 12 , Special Issue 10: EuMCE 2019 Special Issue (Part II) , December 2020 , pp. 1039 - 1046
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Copyright
Copyright © Cambridge University Press and the European Microwave Association 2020

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