Miniaturized quad-element UWB MIMO antenna with reconfigurable X/Ku/K-band notched performance for cognitive radio application

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

Aeu-International Journal of Electronics and Communications Pub Date : 2025-09-25 DOI:10.1016/j.aeue.2025.156049

Biswa Ranjan Swain, Ashish Kumar Sharma

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引用次数: 0

Abstract

In this manuscript, a miniaturized Ultra-Wideband (UWB) reconfigurable MIMO antenna system with sequentially rotated quad elements is proposed to support cognitive radio applications. The developed antenna utilizes a second-order Koch fractal configuration in conjunction with a perturbed ground structure. The individual antenna elements operate at 3.7 − 24 GHz UWB band, where the frequency reconfigurability is realized using a pair of P-I-N diodes connected to the ground plane of each individual antenna. This antenna configuration uses a simplest biasing mechanism using a high impedance H-shaped transmission line. The switching modes of the pair of diodes in each antenna elements determine the band-reject characteristics in Ku and K band (10.6 − 24 GHz). The prototype MIMO antenna system is analyzed through simulations by using CST MWS and verified with fabrication followed by measurement. The MIMO configuration exhibits more than 20 dB inter-port isolation in all diode switching states. Furthermore, the MIMO performance metrices such as ECC (envelop correlation) and CCL (channel capacity loss) are estimated having values < 0.12 and < 0.4 bits/s/Hz respectively. The UWB MIMO configuration is suitable in cognitive radio applications.

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具有可重构X/Ku/ k波段陷波性能的小型化四元超宽带MIMO天线，用于认知无线电应用

在本文中，提出了一种具有顺序旋转四元的小型化超宽带（UWB）可重构MIMO天线系统，以支持认知无线电应用。所开发的天线利用二阶科赫分形结构与摄动地面结构相结合。单个天线元件工作在3.7 - 24 GHz UWB频段，其中频率可重构性是通过一对P-I-N二极管连接到每个单独天线的地平面来实现的。这种天线配置使用最简单的偏置机制，使用高阻抗h形传输线。每个天线单元中一对二极管的开关模式决定了Ku和K频段（10.6−24 GHz）的带阻特性。利用CST MWS对MIMO原型天线系统进行了仿真分析，并进行了制作和测量验证。MIMO配置在所有二极管开关状态下都具有超过20 dB的端口间隔离。此外，估计MIMO性能指标如ECC（包络相关）和CCL（信道容量损失）的值分别为<； 0.12和<； 0.4 bits/s/Hz。超宽带MIMO配置适用于认知无线电应用。

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.