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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A circularly polarized-reconfigurable planar end-fire antenna with bidirectional radiation of same sense and wide beamwidth
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A circularly polarized-reconfigurable planar end-fire antenna with bidirectional radiation of same sense and wide beamwidth

机译：具有相同意义和宽波束宽度的双向辐射的圆极化可重新配置的平面终端消防天线

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摘要

A reconfigurable, planar, and end-fire circularly polarized (CP) antenna with widebeamwidth is presented, which exhibits the bidirectional radiation with the samesense by combining two pairs of identical CP elements placed in a back-to-backconfiguration. The design of the element includes a meandering phase delay line,which connects a printed electric dipole and a quarter-wavelength shorted microstrippatch. Then, eight p-i-n diodes are employed in the two dipoles arms to realizeeither left-handed CP (LHCP) or right-handed CP (RHCP) by manipulatingthe DC bias voltage across p-i-n. The prototype is designed to operate at a centerfrequency of 5.8 GHz with a size of 0.61 × 0.50 × 0.029 (λ_0~3), where λ_0 is the wavelengthof the center frequency. Also, its end-fire beam is in parallel with its plane.Experimental results show that the overlapped bandwidth for 10-dB return lossand the 3-dB axial ratio (AR) of the bidirectional end-fire antenna is from 5.72 to5.89 GHz for the two CP states. The half-power beamwidth (HPBW) in the horizontaland vertical plane are 95°/115° at the 5.8 GHz.
机译：具有宽的可重构，平面和终端圆偏振（CP）天线呈现波束宽度，其具有相同的双向辐射通过将两对相同的CP元素组合在背对背中配置。元件的设计包括曲折相位延迟线，连接印刷电偶极和四分之一波长短款微带修补。然后，在两个偶极臂中使用八个P-I-N二极管来实现通过操纵左手CP（LHCP）或右手CP（RHCP）P-I-n跨越的直流偏置电压。原型设计用于中心频率为5.8 GHz，尺寸为0.61×0.50×0.029（λ_0〜3），其中λ_0是波长中心频率。此外，其端火束与其平面并联。实验结果表明，10 dB回波损耗的重叠带宽双向端火天线的3-DB轴向比（AR）为5.72至5.89 GHz为两个CP州。水平中的半功率波束（HPBW）5.8 GHz的垂直平面为95°/ 115°。

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