A Self-Decoupled Ku-Band CP MIMO Antenna Using Asymmetrically Stepped Slotted Patches

IF 4.6 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2026-10-01 Epub Date: 2026-08-06 DOI:10.1109/LAWP.2026.3720270

Ijaz Khan;Jinyao Zhang;Mian Muhammad Kamal;Kuang Zhang;Habib Ullah;Yizhi Shao;Chaoyun Song

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Abstract

This letter proposes a small self-decoupled circularly polarized (CP) multiple-input–multiple-output (MIMO) antenna working in the Ku band for satellite communication. Each radiating element consists of an asymmetrically stepped slotted patch, in which slot-induced perturbations excite two orthogonal characteristic modes with a quadrature phase relationship, as verified by characteristic mode analysis. This radiator-level design inherently reduces mutual coupling between neighboring elements while achieving CP radiation, without requiring additional decoupling or polarization control mechanisms. The proposed antenna attains an impedance bandwidth of 12 GHz to 14.2 GHz (16.8%) and maintains a minimum interelement isolation of 25 dB across the operating band. CP is achieved with an axial ratio bandwidth of 12.73 GHz to 14.35 GHz. The antenna demonstrates a peak gain of 9.7 dBic and an average gain exceeding 7 dB. The proposed architecture provides a simple and effective solution for compact Ku-band MIMO systems, such as very small aperture terminals and satellite communication applications.

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一种非对称阶梯开槽贴片自解耦ku波段CP MIMO天线

本文提出了一种小型自解耦圆极化（CP）多输入多输出（MIMO）天线，工作在Ku波段，用于卫星通信。每个辐射单元由一个非对称阶跃的开槽贴片组成，通过特征模态分析证实，在其中，开槽引起的微扰激发出两个具有正交相位关系的正交特征模。这种散热器级设计在实现CP辐射的同时，固有地减少了相邻元件之间的相互耦合，而不需要额外的去耦或极化控制机制。该天线的阻抗带宽为12 GHz至14.2 GHz(16.8%)，并在整个工作频带内保持最小元件间隔离25 dB。CP的轴比带宽为12.73 GHz至14.35 GHz。该天线的峰值增益为9.7 dBic，平均增益超过7 dB。该架构为小型ku波段MIMO系统（如极小孔径终端和卫星通信应用）提供了一种简单有效的解决方案。

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

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.