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Journal of Antennas 2020
Ka频段超宽带双圆极化低剖面相控阵天线
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Abstract:
随着近年低轨卫星星座的兴起，相控阵天线受到广泛关注。在此背景下本文设计了一种工作于Ka频段的相控阵天线，其阵元采用微带天线的形式。与传统超宽带阵元多采用振子天线的方法相比，本设计采用常见的微带天线，具有加工简单、低剖面易集成、双极化等显著优点。通过测试可知：该天线驻波小于2的带宽为43%，辐射效率大于85%的带宽为43%，具有较好的阻抗特性和辐射特性，本工作具有一定的创新性和工程实践意义。
With the rise of LEO Satellite Constellation in recent years, phased array antenna has attracted much attention. In this paper, a Ka-band phased array antenna is designed. The array element uses the form of micro-strip antenna. The antenna has the characteristics of ultra-wideband, dual circular polarization, low-profile and high radiation efficiency. Compared with the traditional ul-tra-wideband array element which mostly uses the dipole antenna, the micro-strip antenna is used in this design. It has the advantages of simple processing, easy integration of low profile. According to the test, the bandwidth with the VSWR less than 2 is 46% and the bandwidth with radiation efficiency greater than 85% is 43%. So, this work has innovation and meaning for engineering practice.
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