Design of Planar, Wideband, Multi-Polarization Reconfigurable Filtering Antenna

2019 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2019-05-01 DOI:10.1109/IEEE-IWS.2019.8803934

Dajiang Li, M. Tang, Xiaoming Chen, Yang Wang, Kun‐Zhi Hu, R. Ziolkowski

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Abstract

A planar, wideband, multi-polarization reconfigurable filtering antenna is proposed. By controlling the state of PIN diodes, the operation states of the filtering antenna can be switched among linear polarization (LP), left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP). The filtering antenna consists of a driven patch, a parasitic patch, and an established reconfigurable feed network. Two radiation nulls can be generated at the lower and upper band-edge in all operation states through interaction between the driven patch and feeding network. A pair of U-slots is etched on the driven patch to obtain the extra radiation null to further improve the sharp roll-off rate at the upper band-edge. The optimized prototype was fabricated and tested. The measured results, in good agreement with the simulated values, demonstrate that the filtenna has a wide -10dB fractional bandwidth: 15.6%, a realized gain value over operational bandwidth of 7.7 ± 0.5 dBi, and stable radiation performance. Furthermore, the filtenna presents a good out-of-band rejection level.

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平面宽带多极化可重构滤波天线的设计

提出了一种平面宽带多极化可重构滤波天线。通过控制PIN二极管的工作状态，滤波天线的工作状态可以在线性极化(LP)、左圆极化(LHCP)和右圆极化(RHCP)之间切换。滤波天线由驱动贴片、寄生贴片和已建立的可重构馈电网络组成。在所有工作状态下，通过驱动贴片与馈电网络的相互作用，可以在上下带边缘产生两个辐射零。在驱动贴片上蚀刻一对u型槽，以获得额外的辐射零，进一步提高上带边缘的急剧滚降率。制作并测试了优化后的原型。测量结果与仿真值吻合良好，表明该滤波器具有-10dB分数带宽:15.6%，在工作带宽上的实现增益值为7.7±0.5 dBi，辐射性能稳定。此外，该滤波器具有良好的带外抑制水平。

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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2019 IEEE MTT-S International Wireless Symposium (IWS)

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