Jiaxin Wang, Xiao Liu, Pengfei Zhang, Zheng Xu, Anqi Li, Zhengtian Chen, Jin Fan
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引用次数: 0
摘要
本文提出了一种具有增强轴向比（AR）带宽的中心馈电圆极化叠层贴片天线（CF-CPSPA）。该天线由两个微带贴片组成，下部贴片由一个圆垫、一个椭圆环和连接它们的两条支线组成，用于实现中心馈电条件，上部贴片为椭圆贴片，以实现宽带性能。首先，设计了两个中心馈电线性极化的宽带叠层贴片天线，其中一个模式以 x 极化辐射，另一个产生 y 极化辐射。接着，通过特定设计将两个线性极化天线的正交模式组合在一起。最后，通过适当的参数分析，在工作频段内实现了引入模式的近似等幅和正交相位差。阻抗带宽和 3dB AR 带宽分别提高到 30.4% 和 16.5%。
Wideband Center-fed Stacked Patch Circularly Polarized Antenna used in Phased Array
A center-fed circularly polarized stacked patch antenna (CF-CPSPA) with enhanced axial-ratio (AR) bandwidth is proposed in this paper. The antenna is composed of two microstrip patches, the lower patch consists of a circular pad, an elliptical-ring, and two branch lines connecting them, which is used to realize the center-fed condition, and the upper patch is an elliptical patch to achieve the wide band performance. Firstly, two center-fed linearly polarized stacked patch antennas with wide band are designed, one mode radiated with x polarization, and the other generates y polarized radiation. Next, the orthogonal modes of two linearly polarized antennas are combined together by a specific design. Finally, the approximate equal amplitude and quadrature phase difference of the introduced modes are achieved in the operating frequency band with proper parameters analysis. And the impedance bandwidth and 3dB AR bandwidth is improved to 30.4% and 16.5%.
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