Study on Impact of Mutual Coupling on Performance of Dual Polarized Phased Array Antenna

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S. Benny
S. Sahoo
A. Mukundan

Abstract

This study involves the determination of the impact of mutual coupling between antenna elements on the performance of a dual-polarized, wide-angle scanning, phased array antenna for weather radar applications. Weather radars require dual linearly polarized antennas with low cross-polarization, and a narrow beam phased array for wide scanning angle. For this simulation-based study, a microstrip dual linearly polarized 2x20 phased array antenna operating at S-band (2.65 to 3.0 GHz) is designed. This antenna has been designed to have a cross-polarization level less than -45 dB at both polarizations and for the scan angle range of -55o to 55o, which is better than most of the existing dual-pol phased array antennas. This antenna has been used to analyze the impact of mutual coupling on cross-polarization, beamwidth, and antenna gain at various scan angles. Mutual coupling is studied in terms of antenna active element pattern and the corresponding cross-polarization value as well as the active reflection coefficient and impedance values for inter-element spacings of 0.4λ and 0.5λ. It has been found in this study that cross-polarization levels of the whole array (at various scan angles) are affected significantly because of mutual coupling between elements.

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How to Cite
Benny, S., Sahoo, S., & Mukundan, . A. (2022). Study on Impact of Mutual Coupling on Performance of Dual Polarized Phased Array Antenna. Advanced Electromagnetics, 11(2), 15–22. https://doi.org/10.7716/aem.v11i2.1843
Section
Research Articles
Author Biographies

S. Benny, Indian Institute of Technology Palakkad

Ms. Steffy Benny is a PhD student with Electrical Engineering Department at Indian Institute of Technology Palakkad. She is her third year of PhD. She has completed her Master of Technology from College of Engineering Trivandrum.

S. Sahoo, Indian Institute of Technology Palakkad

Dr. Swaroop Sahoo is an Assistant Professor with Electrical Engineering at Indian Institute of Technology Palakkad, Palakkad, India. He has been working as Assistant Professor at the Institute since 2016. He got his PhD in Electrical Engineering from Colorado State University, USA in 2014.

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