A Low Back-lobe Miniaturized Circular Polarized Antenna with Spiral Elements

Hiroaki Sakamoto, Hidetoshi Makimura, K. Nishimoto, Y. Nishioka, Y. Inasawa
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Abstract

In this paper, we propose a method to decrease back-lobe radiation of the small Circular Polarized (CP) antenna. The proposed CP antenna is composed of four antenna elements arranged in a rotational symmetry at 90 degrees on the ground, which are excited with the same amplitude and 90 degrees phase difference. Each antenna element is formed by a spiral antenna branched from the near the middle of an inverted-L antenna. From the result of simulation, backward radiation of the proposed CP antenna can be decreased by 13 dB due to the addition of the spiral elements.
带螺旋元件的低后瓣小型化圆极化天线
本文提出了一种减小小型圆极化(CP)天线后瓣辐射的方法。所提出的CP天线由四个天线单元组成,四个天线单元在地面上以90度旋转对称排列,以相同的振幅和90度相位差激励。每个天线单元由从倒l型天线的近中部分支的螺旋天线组成。仿真结果表明,由于螺旋元件的加入,所提出的CP天线的反向辐射可降低13 dB。
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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