Gain and axial ratio bandwidth enhancement of circularly polarised antenna using PRMS

IF 3.2 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Aeu-International Journal of Electronics and Communications Pub Date : 2025-06-01 Epub Date: 2025-04-08 DOI:10.1016/j.aeue.2025.155797

Rohit Khandekar, Deepika Sipal

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Abstract

This article presents a 9 × 9 partially reflective metasurface (PRMS) array used to form a Fabry-Perot cavity (FPC) to enhance gain and enhance 3 dB axial ratio bandwidth (ARBW) of the wideband circularly polarised (CP) antenna. The bottom side of the PRMS unit cell produces high reflectivity, while the top side yields positive phase gradience. The CP feeder resonates from 10.26 GHz to 12.19 GHz, and AR < 3 dB is from 10.84 GHz to 11.63 GHz and elliptical polarisation (EP) is observed at 10 GHz and 12 GHz. Which is leveraged in the FPC configuration to convert EP into CP waves, thus enhancing ARBW. The proposed FPC antenna resonates from 9.9 GHz to 12.31 GHz and has enhanced ARBW below 3 dB from 9.9 GHz to 12.21 GHz. The enhanced ARBW of 2.31 GHz overlaps 2.41 GHz of impedance BW. The maximum enhanced gain at 10 GHz is 17.1 dBi from 7.3 dBi. The proposed antenna is right-hand circularly polarised (RHCP), and the total profile is 2.6 λ₀ × 2.6 λ₀ × 0.52 λ₀ only (where λ₀ is free space wavelength at 9.9 GHz), which can be installed on 1U-Cube Sat.

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利用PRMS增强圆极化天线的增益和轴比带宽

本文介绍了一种 9 × 9 部分反射元表面（PRMS）阵列，用于形成法布里-珀罗腔（FPC），以提高宽带圆极化（CP）天线的增益和 3 dB 轴向比带宽（ARBW）。PRMS 单元尺寸的底面产生高反射率，而顶面则产生正相位梯度。CP 馈线的谐振频率为 10.26 GHz 至 12.19 GHz，AR < 3 dB 的谐振频率为 10.84 GHz 至 11.63 GHz，在 10 GHz 和 12 GHz 可观察到椭圆极化（EP）。椭圆极化（EP）在 10 千兆赫和 12 千兆赫处被观测到，在 FPC 配置中，椭圆极化被利用来将 EP 波转换为 CP 波，从而增强了 ARBW。拟议的 FPC 天线共振频率为 9.9 GHz 至 12.31 GHz，从 9.9 GHz 至 12.21 GHz 的增强 ARBW 低于 3 dB。2.31 GHz 的增强 ARBW 与 2.41 GHz 的阻抗 BW 重叠。10 GHz 时的最大增强增益从 7.3 dBi 增至 17.1 dBi。拟议的天线为右旋圆极化（RHCP），总外形尺寸仅为 2.6 λ0 × 2.6 λ0 × 0.52 λ0（其中 λ0为 9.9 GHz 的自由空间波长），可安装在 1U 立方卫星上。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.