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Binomial stub loaded compact Vivaldi antenna for superwideband applications

Published online by Cambridge University Press:  09 September 2020

Abhik Gorai Open the ORCID record for Abhik Gorai [Opens in a new window]  and
Rowdra Ghatak
Abhik Gorai*
Affiliation:
School of Electronics Engineering, KIIT Deemed University, Bhubaneswar, India
Rowdra Ghatak
Affiliation:
ECE Dept, Microwave and Antenna Research Laboratory, National Institute of Technology Durgapur, West Bengal, India
*
Author for correspondence: Abhik Gorai, E-mail: abhik.gorai@gmail.com
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Abstract

A compact antipodal Vivaldi antenna with superwideband characteristics is presented in this paper. For improved matching of input impedance at lower frequency region, techniques like binomial tapering of outer edges, binomial slit loaded outer edge, and protruded binomial tapered stub loading have been adopted. The antenna operates in a wide frequency range from 2 to 20 GHz. Experimental results show, stable radiation pattern with peak realized gain of more than 8 dBi, group delay within 1 ns, 164% fractional bandwidth, radiation efficiency of more than 90%, which are in good agreement with the simulated results. The compact size of the proposed antenna (1.14λ0 × 1.21λ0) with wide frequency bandwidth and directional radiation characteristics make it suitable for through-wall radar and medical imaging applications.

Keywords

UltrawidebandVivaldi antennabinomial stub
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 5 , June 2021 , pp. 463 - 468
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press in association with the European Microwave Association

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