Characteristic mode inspired compact broadband circularly polarized non-uniform metasurface antenna for sub-7 GHz applications

IF 3.2 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-15 DOI:10.1016/j.aeue.2025.155939

Biku Raut , Bikash K. Santi , Rajanikanta Swain , Dhruba C. Panda , Deepak K. Naik

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引用次数: 0

Abstract

This paper presents a compact, low-cost, single-fed broadband circularly polarized (CP) metasurface (MTS) antenna based on axial ratio improvement using rectangular, non-uniformly arranged meta elements. The antenna comprises a new notched driving patch and a top 4 × 4 array-sized rectangular non-uniform metasurface. The driving patch creates a wide horizontal mode, and the MTS creates two well-separated vertical modes. The appropriate separation among these three orthogonal modes creates 90° phase differences, resulting in two CP poles. Consequently, overlapping these two CP poles creates a broad axial ratio bandwidth (ARBW). The design and analysis of the proposed antenna are carried out using characteristic mode analysis to understand the modal behavior and optimize performance. The antenna uses a low-cost FR-4 substrate with a compact size of 0.7

λ

× 0.7

λ

× 0.07

λ

. The antenna exhibits an impressive impedance bandwidth of 54.28% (5.1–8.9 GHz) and axial ratio bandwidth of 38% (5.6–8.26 GHz). The design also has a consistent gain over the entire operating band with a peak gain of 6.8 dBic.

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特征模式启发的紧凑型宽带圆极化非均匀超表面天线，用于7 GHz以下的应用

本文提出了一种紧凑、低成本、单馈宽带圆极化超表面（MTS）天线，该天线采用矩形、非均匀排列的元元件改进轴比。该天线包括一个新的缺口驱动贴片和一个顶部4 × 4阵列大小的矩形非均匀超表面。驱动贴片创建了一个宽的水平模式，而MTS创建了两个良好分离的垂直模式。这三个正交模式之间的适当分离产生90°相位差，从而产生两个CP极。因此，重叠这两个CP极产生宽轴比带宽（ARBW）。利用特征模态分析对天线进行设计和分析，了解天线的模态行为，优化天线的性能。天线采用低成本的FR-4基板，尺寸为0.7λ × 0.7λ × 0.07λ。该天线具有54.28% （5.1-8.9 GHz）的阻抗带宽和38% （5.6-8.26 GHz）的轴比带宽。该设计在整个工作频带内具有一致的增益，峰值增益为6.8 dBic。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.