Polarization-Agile Circular Polarized Antenna Based on Proximity Feeding Technique
Polarization-Agile Circular Polarized Antenna Based on Proximity Feeding Technique
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基于邻近馈电技术的极化-敏捷圆极化天线
DOI：
10.1109/lawp.2021.3092014
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发表时间：
2021
影响因子：
4.2
通讯作者：
S. Iwasaki
中科院分区：
文献类型：
--
作者：
Chai;T. Fujimoto;S. Iwasaki
本文介绍了极化捷变圆极化天线的设计和实验验证。该天线是由一个贴片天线与截断狭缝和两个接近馈线。当天线由邻近馈线馈电时，它产生垂直线性极化波。然后通过在两个邻近馈线之间施加电势差来产生水平线极化波。通过在贴片天线中加入截断狭缝，在两个正交极化波之间产生正交相位差。通过交换邻近馈线的极性，可以改变偏振感测。采用分布式电路模型描述了天线的工作机理。通过无源型和有源型切换电路验证了圆极化捷变贴片天线的有效性。测得的轴比带宽为4.085%（100 MHz），和分数阻抗带宽大于7%的左手和右手圆极化辐射。
In this letter, the design and experimental validation of polarization-agile circular polarized antenna are presented. The antenna is comprised of a patch antenna with truncated slits and two proximity feedlines. The antenna produces a vertical linear polarized wave when it is fed by a proximity feedline. Horizontal linear polarized wave is then generated by applying a potential difference between two proximity feedlines. The quadrature phase difference between two orthogonal polarized waves is created by adding truncated slits into the patch antenna. By swapping the polarity of the proximity feedlines, polarization sense can be changed. The distributed circuit model is presented to describe the working mechanism of the antenna. Patch antenna with circular polarization agility is then validated through passive-type and active-type switching circuits. The measured axial ratio bandwidth is 4.085% (100 MHz), and the fractional impedance bandwidth is greater than 7% for the left-handed and right-handed circular polarized radiations.