Pac-Man-Shaped Patch-Driven Broadband Circularly Polarized Metasurface Antenna With CMA-Based Quadruple-Mode Excitation

Pac-Man-Shaped Patch-Driven Broadband Circularly Polarized Metasurface Antenna With CMA-Based Quadruple-Mode Excitation

This paper introduces a novel quadruple-mode excited low-profile metasurface (MTS)-based broadband circularly polarized (CP) patch antenna. For a quadruple-mode excitation, the antenna uses a unique pac-man-shaped patch (PSP) as the primary CP radiator and above it a <inline-formula> <tex-m...

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Bibliographic Details
Main Authors: Deepak K. Naik, Dhruba Charan Panda, Rajanikanta Swain, Arjuna Muduli, Sambhudutta Nanda
Format: Article
Language:English
Published: IEEE 2025-01-01
Series:IEEE Access
Subjects:
Broadband
characteristic mode analysis (CMA)
circular polarization (CP)
metasurface (MTS)
pac-man-shaped patch
quadruple-mode excitation
Online Access:https://ieeexplore.ieee.org/document/10829935/
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Summary:This paper introduces a novel quadruple-mode excited low-profile metasurface (MTS)-based broadband circularly polarized (CP) patch antenna. For a quadruple-mode excitation, the antenna uses a unique pac-man-shaped patch (PSP) as the primary CP radiator and above it a <inline-formula> <tex-math notation="LaTeX">$4\times 4$ </tex-math></inline-formula> sized rectangular MTS, which acts as the secondary radiator. Characteristic mode analysis (CMA)-based mode manipulation approach facilitates effortless separation of two orthogonal modes (OMs) of PSP, creating a 90&#x00B0; phase difference for circular polarization. Further, to increase the design&#x2019;s axial ratio bandwidth (ARBW), two additional OMs of the MTS layer are cascaded with the PSP modes. Consequently, the four OMs exhibit quadruple-mode excitation, and the design achieves broadband CP radiation. A prototype of the proposed antenna is fabricated using an FR-4 substrate, and the overall dimension of the antenna is <inline-formula> <tex-math notation="LaTeX">$0.55\lambda \times 0.7\lambda \times 0.06\lambda $ </tex-math></inline-formula> at 6.46 GHz center operating frequency. The 10 dB impedance bandwidth of the antenna is 55.22% (4.68&#x2013;8.25 GHz), and the 3 dB ARBW is 35.48% (5.1&#x2013;7.3 GHz). It exhibits a peak gain of 6.2 dBi. The measurement results agree well with the simulation results.
ISSN:2169-3536

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