单层微带贴片天线中宽带圆极化场的产生

A. Torres-García, F. Marante, A. Tazón, J. Vassal'lo, J. Teniente, M. Beruete
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引用次数: 11

摘要

本文提出了一种通过单层电磁耦合产生宽带圆极化辐射的微带贴片激励技术。圆极化操作是通过简单地调整馈电系统的尺寸,而不改变微带散热器。该进给技术还具有适用于任何正多边形的优点;在这种情况下,对正方形和椭圆进行了实验验证。仿真结果表明,相对于2.44 GHz的中心频率,该天线的轴比带宽分别为100 MHz(4%)和110MHz(4.48%),为RFID阅读器或ISM频段通信等应用提供了一个有趣的解决方案。
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Broadband circular polarized field generation in single layer microstrip patch antennas
In this paper we present a microstrip patch excitation technique through electromagnetical coupling in a single layer able to generate broadband circularly polarized (CP) radiation. The circular polarization operation is obtained by simply adjusting the feed system dimensions without modifying the microstrip radiator. The proposed feed technique also has the advantage of being applicable to any regular polygon; in this case, its operation is validated experimentally for a square and an ellipse. From the simulation results a 3-dB axial-ratio bandwidth of 100 MHz (4%) and 110MHz (4.48%) are obtained, respectively, relative to the center frequency of 2.44 GHz, making the designed antennas an interesting solution for applications such as RFID readers, or communications in ISM band.
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