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Wideband dual-polarized Vivaldi antenna with improved balun feed

Published online by Cambridge University Press:  01 August 2018

Lizhong Song  and
Huiyuan Zhou
Lizhong Song*
Affiliation:
School of Information and Electrical Engineering, Harbin Institute of Technology at Weihai, 264209, P.R. China
Huiyuan Zhou*
Affiliation:
School of Information and Electrical Engineering, Harbin Institute of Technology at Weihai, 264209, P.R. China
*
Author for correspondence: L. Song, H. Zhou, E-mail: songlz@hit.edu.cn, easy_zhou_easy@163.com
Author for correspondence: L. Song, H. Zhou, E-mail: songlz@hit.edu.cn, easy_zhou_easy@163.com
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Abstract

The paper researches a kind of wideband dual-polarized Vivaldi antenna with improved balun feed which consists of slot line and two bent coplanar strip lines. The whole of antenna structure is composed of two orthogonal Vivaldi antenna elements, and the mode of feeding adopts electromagnetic coupling from micro-strip line to slot line. The improved balun can avoid the intersection of transmission lines, reduce the size, and simplify the assembly. The electromagnetic simulation and optimization design of proposed antenna are carried out by using electromagnetic simulation software, CST. Simulation results show that the isolation between two polarized ports is more than 15 dB within working frequency range of 2–3.5 GHz and VSWRs of two ports are lower than 2.5 at the range of 2–3.5 GHz. The designed antenna is fabricated and measured. The measured results indicate that the designed antenna achieves anticipated patterns and feasible design of the dual-polarized Vivaldi antenna. The dual-polarized Vivaldi antenna with improved balun feed is suitable for some application fields, such as passive electronic reconnaissance, passive radar, and wideband communication and detection.

Keywords

Balundual-polarized antennaradiation patternVivaldi antenna
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 1 , February 2019 , pp. 41 - 52
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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