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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Wideband circularly polarized concentric cylindrical dielectric resonator antenna excited by helix
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Wideband circularly polarized concentric cylindrical dielectric resonator antenna excited by helix

机译：宽带圆偏振的同心圆柱电介质谐振器天线通过螺旋兴奋

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摘要

In this paper, a wideband circularly polarized two-layer concentric cylindricaldielectric resonator antenna (CDRA) is proposed for C-band applications. Togenerate the circular polarization in the CDRA, the proposed antenna isexcited with four turn helical wire. The helix excites the two orthogonal modes(HE11δ) in quadrature phase, which result in the circular polarization. The fourdifferent design cases are investigated and the best one is fabricated and measured.The impedance bandwidth is improved when two-layer concentricCDRA is used. The simulated and measured bandwidth of the proposedantenna varies from 3.60 to 6.03 GHz with impedance bandwidth of 50.46%and 3.65 to 6 GHz (48.70% impedance bandwidth) respectively, while axialratio impedance bandwidth are 43.13% (4.20–6.51 GHz) and 38.82% (4.40–6.52 GHz) respectively. The proposed antenna attains 10.9 dBi measured peakgain at 4.5 GHz. The fabricated prototype is experimentally measured and itsresults are found to be in good agreement with the simulation results.
机译：本文，宽带圆偏振两层同心圆柱形提出了用于C波段应用的介质谐振器天线（CDRA）。到在CDRA中产生圆极化，所提出的天线是兴奋四个转向螺旋线。螺旋激发了两个正交模式（HE11δ）在正交阶段，导致圆极化。四研究了不同的设计案例，并制造和测量最好的设计案例。当两层同心时，阻抗带宽得到改善使用CDRA。建议的模拟和测量带宽天线从3.60到6.03 GHz变化，阻抗带宽为50.46％和3.65至6 GHz（48.70％阻抗带宽），同时轴向比率阻抗带宽为43.13％（4.20-6.51 GHz）和38.82％（4.40-6.52 GHz）分别。所提出的天线达到10.9 dBi测量的峰值收益4.5 GHz。通过实验测量制造的原型及其发现结果与模拟结果吻合良好。

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