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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A low-profile circularly polarized antenna based on a circularly symmetric high impedance surface
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A low-profile circularly polarized antenna based on a circularly symmetric high impedance surface

机译：基于圆对称的高阻抗表面的低型圆偏振天线

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摘要

A circularly symmetric high impedance surface (HIS)-based low-profile circularly polarized antenna with stable phase center is investigated. The antenna consists of a series-fed eight-arm spiral slot antenna and a circularly symmetric HIS (CSHIS) used as the ground plane. As the use of CSHIS, the profile of antenna is decease to as low as 0.09λ (λ is the free space wavelength), while the phase center of the antenna maintains stable. Also, the gain of the presented antenna is enhanced compared with that utilizing HIS with rectangular unit cell. For verifying, a prototype of the antenna was fabricated and measured. The measured results show that the overlap bandwidth of 3-dB axial ratio and impedance matching covers 1.14-1.45 GHz (23.9%), and the gain can reach as high as 7.79 dBic. Over the operation band, stable phase center also can be observed.
机译：研究了具有稳定相位稳定的相位中心的基于循环对称的高阻抗表面（其）的基于低型圆极化天线。 天线由串联八臂螺旋槽天线组成，以及用作地面平面的圆对称他的（CSHIS）。 作为CSHIS的使用，天线的轮廓是低至0.09λ（λ是自由空间波长）的降低，而天线的相位中心保持稳定。 而且，与利用矩形单元电池的利用相比，提高了所提出的天线的增益。 为了验证，制造和测量天线的原型。 测量结果表明，3-DB轴向比和阻抗匹配的重叠带宽涵盖1.14-1.45GHz（23.9％），增益可以高达7.79 dBic。 在操作带上，也可以观察到稳定的相位中心。

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