Wideband Circularly Polarised Metasurface Microstrip Patch Antenna Using Characteristic Mode Analysis

IF 1.3 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Iet Microwaves Antennas & Propagation Pub Date : 2025-08-17 DOI:10.1049/mia2.70043

Jiangwei Li, Ye Zhao, Haiqing Guo, Rui Gao, Zhihui He, Zhimin Yang

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Abstract

A double-layer wideband circularly polarised (CP) metasurface (MTS) antenna is proposed. The MTS consists of a 4 × 4 L-shaped patch array. The modal behaviours of the proposed MTS are investigated using the characteristic mode theory. Two characteristic modes with orthogonal current distributions are selected as the operational modes. Furthermore, an aperture-coupled feeding structure is employed to excite the two orthogonal modes with a 90° phase difference, enabling CP radiation. It can also excite the MTS to generate multiple resonances and axial ratio (AR) minimum points, which collectively yield an acceptable bandwidth for both impedance and AR. Finally, an antenna prototype is designed to validate the simulated results. The measured results show that the MTS antenna offers a −10 dB impedance bandwidth (IBW) of 34.9% (4.25–6.05 GHz), a 3 dB AR bandwidth (ARBW) of 13.2% (5.3–6.05 GHz) and a maximum gain of 7.3 dBic.

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基于特征模式分析的宽带圆极化超表面微带贴片天线

提出了一种双层宽带圆极化超表面（MTS）天线。MTS由一个4 × 4 l型贴片阵列组成。利用特征模态理论研究了MTS的模态行为。选择两种电流分布正交的特征模式作为工作模式。此外，采用孔径耦合馈电结构激发两个相位差为90°的正交模，实现CP辐射。它还可以激发MTS产生多个共振和轴向比（AR）最小点，这些点共同产生阻抗和AR可接受的带宽。最后，设计了天线原型来验证仿真结果。测量结果表明，MTS天线的- 10 dB阻抗带宽（IBW）为34.9% (4.25 ~ 6.05 GHz)， 3 dB AR带宽（ARBW）为13.2% (5.3 ~ 6.05 GHz)，最大增益为7.3 dBic。

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来源期刊

Iet Microwaves Antennas & Propagation 工程技术-电信学

CiteScore

4.30

自引率

5.90%

发文量

109

审稿时长

7 months

期刊介绍： Topics include, but are not limited to: Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques. Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas. Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms. Radiowave propagation at all frequencies and environments. Current Special Issue. Call for papers: Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf