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首页> 外文期刊>Applied Computational Electromagnetics Society journal >A Low Profile Circularly Polarized Antenna based on Stepped Open-ended Slot Radiator
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A Low Profile Circularly Polarized Antenna based on Stepped Open-ended Slot Radiator

机译：基于阶梯式开放式缝隙辐射器的薄型圆极化天线

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摘要

A compact wide band and low profile circularly polarized antenna is presented based on stepped open-ended slotline in this paper. The antenna is composed of four open-end-slotted patchs and a feed network. Four open-end-slotted patchs are sequentially rotated and vertically soldered on the ground plane of the feed network, and are excited by a wide band transition from strip-line to slot-line with short pin in antenna element. The CP radiation of the proposed antenna is realized by four output ports of the feed network which transmit four signals that have equal amplitude with quadrature phase difference (0 degrees, 90 degrees, 180 degrees, and 270 degrees). Simulation results are compared with the measurements, and a good agreement is obtained. The measured results show that the proposed antenna can provide broad impedance bandwidth of 73.4% (3.5 GHz-7.56 GHz) (reflection coefficient less than -10 dB), a maximum gain of 4.74 dBi, and a 3-dB axial ratio (AR) bandwidth of about 35.1% (3.65 GHz-5.2 GHz).
机译：本文提出了一种基于阶梯式开放式缝隙线的紧凑型宽带低剖面圆极化天线。天线由四个开槽的贴片和一个馈电网络组成。依次旋转四个开口狭缝的贴片并将其垂直焊接在馈电网络的接地面上，并通过从带状线到狭缝线的宽带过渡（天线元件中的短针脚）进行激励。所提出的天线的CP辐射是通过馈电网络的四个输出端口实现的，该端口输出四个信号，这些信号具有相等的振幅且具有正交相位差（0度，90度，180度和270度）。将仿真结果与测量结果进行比较，取得了很好的一致性。测量结果表明，所建议的天线可以提供73.4％（3.5 GHz-7.56 GHz）的宽阻抗带宽（反射系数小于-10 dB），最大增益4.74 dBi和3dB的轴向比率（AR）带宽约为35.1％（3.65 GHz-5.2 GHz）。

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