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Circularly Polarized Broadband Printed Antenna for Wireless Applications

机译：用于无线应用的圆极化宽带印刷天线

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摘要

A simple, compact sickle-shaped printed antenna with a slotted ground plane is designed and developed for broadband circularly polarized (CP) radiation. The sickle-shaped radiator with a tapered feed line and circular slotted square ground plane are utilized to realize the wideband CP radiation feature. With optimized dimensions of 0.29λ × 0.29λ × 0.012λ at 2.22 GHz frequency for the realized antenna parameters, the measured results display that the antenna has a 10 dB impedance bandwidth of 7.70 GHz (126.85%; 2.22–9.92 GHz) and a 3 dB axial ratio (AR) bandwidth of 2.64 GHz (73.33%; 2.28–4.92 GHz). The measurement agrees well with simulation, which proves an excellent circularly polarized property. For verification, the mechanism of band improvement and circular polarization are presented, and the parametric study is carried out. Since, the proposed antenna is a simple design structure with broad impedance and AR bandwidth, which is a desirable feature as a candidate for various wireless communication systems. Because of the easy printed structure and scaling the dimension with broadband CP characteristics, the realized antenna does incorporate in a number of CP wireless communication applications.
机译：设计并开发了一种带有狭缝接地平面的简单，紧凑的镰刀形印刷天线，用于宽带圆极化（CP）辐射。利用带有锥形馈线和圆形开槽方形接地平面的镰刀形辐射器来实现宽带CP辐射功能。对于已实现的天线参数，在2.22 GHz频率下具有0.29λ×0.29λ×0.012λ的最佳尺寸，测量结果表明，该天线具有7.70 GHz（126.85％; 2.22–9.92 GHz）的10 dB阻抗带宽和3 dB轴比（AR）带宽为2.64 GHz（73.33％； 2.28-4.92 GHz）。测量结果与模拟吻合得很好，证明了极好的圆极化特性。为了验证这一点，提出了能带改善和圆极化的机理，并进行了参数研究。由于，所提出的天线是具有宽阻抗和AR带宽的简单设计结构，这是作为各种无线通信系统的候选的理想特征。由于易于打印的结构和具有宽带CP特性的尺寸比例，所实现的天线的确包含在许多CP无线通信应用中。

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