A Compact Frequency Reconfigurable MIMO Antenna with Agile Feedline for Cognitive Radio Applications

2018 10th International Conference on Communications, Circuits and Systems (ICCCAS) Pub Date : 2018-12-01 DOI:10.1109/ICCCAS.2018.8769232

S. Riaz, Xiongwen Zhao, S. Geng

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引用次数: 4

Abstract

A novel frequency agile MIMO patch antenna based on a reconfigurable feedline is presented. The proposed antenna structure has two hexagonal-shaped patch antenna elements. A defected ground structure (DGS) having hexagonal shape is included in the ground plane to make the design compact and improve isolation between antenna elements. Further compactness is achieved using reactive loading. Frequency reconfigurability is realized by employing varactor diodes in microstrip feedline. The proposed antenna achieves a frequency reconfigurable band with wide tuning range from 1.41 to 2.26 GHz with good gain and efficiency. Furthermore, an envelope correlation coefficient (ECC) did not exceed 0.2 and isolation was more than 12 dB, demonstrating good MIMO performance. The presented antenna has a planar, low profile structure with compact size of 100 × 50 mm2. The proposed design is validated by simulations, displaying good results. The reconfigurability, wide range tuning, low ECC and compact size makes the presented antenna a good candidate for wireless handheld devices in cognitive radio applications.

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基于敏捷馈线的小型频率可重构MIMO天线

提出了一种基于可重构馈线的频率敏捷MIMO贴片天线。所提出的天线结构具有两个六边形贴片天线单元。为使设计紧凑并提高天线元件之间的隔离性，在接平面中包含具有六角形的缺陷接地结构(DGS)。进一步的紧凑性是通过使用反应负荷实现的。在微带馈线中采用变容二极管实现了频率可重构性。该天线实现了1.41 ~ 2.26 GHz宽调谐范围的频率可重构频带，具有良好的增益和效率。此外，包络相关系数(ECC)不超过0.2，隔离度大于12 dB，具有良好的MIMO性能。该天线具有平面、低轮廓结构，尺寸紧凑，为100 × 50 mm2。通过仿真验证了该设计的正确性，取得了良好的效果。该天线具有可重构性、宽范围调谐、低ECC和紧凑的尺寸，是认知无线电应用中无线手持设备的理想选择。

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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2018 10th International Conference on Communications, Circuits and Systems (ICCCAS)

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