Perturbation-Free Circularly Polarized Annular Sector Patch Antenna Under Resonance of Multiple Nondegenerate Modes

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-06-16 DOI:10.1109/LAWP.2025.3580059

Fei-Yan Ji;Wen-Jun Lu;Xiao-Hui Mao;Lei Zhu

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Abstract

Circularly polarized (CP) microstrip annular sector patch antennas (MASPAs) with adjustable 3 dB axial ratio beamwidth (ARBW) under resonance of nondegenerate modes are proposed. Within an annular sector patch radiator with both inner and outer circumferences to be short-circuited, the odd-symmetric, circumferentially resonant TM_π/_α_,1 mode and the even-symmetric, radially resonant TM₀₁ mode are simultaneously excited to yield dual-mode resonant MASPAs without additional perturbations in an asymmetrically fed manner. The equal amplitude and self-phase-shift conditions for circularly polarized operation are theoretically deduced and employed to design different dual-mode resonant MASPAs on air substrate for validations. The squint CP angle θ_t and adjustable ARBW are distinctive to conventional microstrip patch antennas under resonance of a pair of degenerate modes. In this sense, the fabricated MASPA successfully exhibits 3 dB AR bandwidths of 4.5% and maximum 3 dB ARBW of 110°, while keeping the simplest single-layer, single-fed configuration without incorporating additional perturbed stubs, slits or pins.

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非简并多模共振下的无微扰圆极化环形扇形贴片天线

提出了在非简并模式下具有3db轴比波束宽度可调的圆极化微带环形扇形贴片天线（MASPAs）。在内外周均短路的环形扇形贴片辐射体中，奇对称的周向谐振TMπ/α，1模式和均匀对称的径向谐振TM01模式以非对称馈电方式同时激发，产生无额外扰动的双模谐振maspa。从理论上推导了圆极化工作的等幅和自相移条件，并利用该条件在空气基板上设计了不同的双模谐振maaspas进行验证。在一对简并模式的共振下，斜视CP角θt和可调的ARBW是传统微带贴片天线的特点。从这个意义上说，制造的MASPA成功地展示了4.5%的3db AR带宽和110°的最大3db ARBW，同时保持了最简单的单层，单馈线配置，而没有添加额外的扰动存根，狭缝或引脚。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.