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A novel dual-band absorber for millimeter-wave RADAR applications

Published online by Cambridge University Press:  11 December 2024

Geethanjali Govindarajan*
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai, 600025 India
Mohammed Gulam Nabi Alsath
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai, 600025 India
Kirubaveni Savarimuthu
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai, 600025 India
Malathi Kanagasabai
Affiliation:
Department of Electronics and Communication Engineering, College of Engineering Guindy, Anna University, Chennai, 600025 India
*
Corresponding author: Geethanjali Govindarajan; Email: [email protected]

Abstract

A linearly polarized dual-resonant millimeter-wave absorber for Radio Detection And Ranging (RADAR)applications is presented in this paper. The frequency-selective absorber (FSA) is composed of solitarily using the distributed elements. The proposed FSA achieves a dual-band resonance characteristic utilizing the mutual coupling between concentric square loops, the second harmonic mode of the Jerusalem cross, and the corrugated cross grids. The proposed dual-band FSA operates from 25.5 to 26.5 GHz (1 GHz) (fL) and 31.8 GHz–32.5 GHz (0.7 GHz) (fH) with minimum absorptivity of 96% and 92%, respectively. The desired frequency response of the proposed unit cell is demonstrated by an equivalent circuit model. The FSA prototype is fabricated and the simulated results are validated using experimental measurements. The proposed FSA is a suitable candidate for stealth application in defense and military systems.

Type
Research Paper
Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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