A single-layer multimode high gain circularly polarized metasurface antenna using CMA for C-band applications

IF 1.4 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC International Journal of Microwave and Wireless Technologies Pub Date : 2024-04-05 DOI:10.1017/s1759078724000424

Deepak Gangwar, Ankit Sharma

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Abstract

This article presents an innovative design for a low-profile, high-gain circularly polarized (CP) antenna using a single-layer metasurface (MTS). The proposed design incorporates an MTS layer, comprising a 4 × 4 array of hexagonal-shaped patches, printed on the top layer of the substrate. The bottom layer features a coplanar waveguide-fed slotted ground. Circular polarization and broadside radiation are achieved through the application of characteristic mode analysis (CMA). CMA is employed to simultaneously excite desired modes, aiming for wideband circular polarization and gain enhancement. Experimental results validate the effectiveness of the design, with compact dimensions of 0.67λ0 × 0.67λ0 × 0.04λ0. The measurements demonstrate an impressive impedance bandwidth of 84.3% within the 3.7–9.1 GHz. Additionally, a 3-dB axial ratio bandwidth of 18.6% is observed between 4.96 and 5.98 GHz and 3.74% between 8.38 and 8.7 GHz. The antenna exhibits excellent radiation pattern characteristics, featuring a maximum gain of 10.08 dBi at 7.1 GHz. The radiation pattern is symmetrical with broadside directionality, making the antenna well-suited for sensing applications.

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用于 C 波段应用的使用 CMA 的单层多模高增益圆极化元面天线

本文介绍了一种使用单层元表面（MTS）的低剖面、高增益圆极化（CP）天线的创新设计。拟议的设计包含一个 MTS 层，由 4 × 4 的六边形贴片阵列组成，印制在基板的顶层。底层是共面波导馈电槽地。圆极化和宽边辐射是通过应用特征模式分析（CMA）实现的。CMA 可同时激发所需的模式，从而实现宽带圆极化和增益增强。实验结果验证了设计的有效性，其尺寸仅为 0.67λ0 × 0.67λ0 × 0.04λ0。测量结果表明，在 3.7-9.1 GHz 频率范围内，阻抗带宽达到 84.3%，令人印象深刻。此外，4.96 和 5.98 GHz 之间的 3-dB 轴向比带宽为 18.6%，8.38 和 8.7 GHz 之间为 3.74%。该天线具有出色的辐射模式特性，在 7.1 GHz 时的最大增益为 10.08 dBi。辐射模式是对称的，具有宽方向性，使天线非常适合传感应用。

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来源期刊

International Journal of Microwave and Wireless Technologies ENGINEERING, ELECTRICAL & ELECTRONIC-TELECOMMUNICATIONS

CiteScore

3.50

自引率

7.10%

发文量

130

审稿时长

6-12 weeks

期刊介绍： The prime objective of the International Journal of Microwave and Wireless Technologies is to enhance the communication between microwave engineers throughout the world. It is therefore interdisciplinary and application oriented, providing a platform for the microwave industry. Coverage includes: applied electromagnetic field theory (antennas, transmission lines and waveguides), components (passive structures and semiconductor device technologies), analogue and mixed-signal circuits, systems, optical-microwave interactions, electromagnetic compatibility, industrial applications, biological effects and medical applications.