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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Wideband circularly polarised array antenna with flat-top beam pattern
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Wideband circularly polarised array antenna with flat-top beam pattern

机译：具有平顶波束方向图的宽带圆极化阵列天线

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摘要

A wideband circularly polarised array antenna consisting of 10-element bowtie dipole antenna and feed network is presented. A narrow patch connecting the pair of bowtie dipoles as an entity is employed to achieve high gain. To obtain wideband and flat-top beam of radiation patterns, amplitude and phase distribution along the feed are optimised by application of the Self-adaptive Differential Evolution algorithm. Particularly, the feed network with broadband phase shift performance is designed to satisfy bandwidth requirement ranging from 1.1 to 1.6 GHz. The proposed antenna can achieve an excellent impedance matching and Axial Ratio characteristics over the entire operating band. Moreover, the ripple of co-polarisation radiation pattern covering ±12° in the elevation plane is better than 0.92 dB; whereas the gain is also better than 11.8 dB and the side lobes are below -13 dB. Measured results validate the design concept and indicate that the proposed array exhibits good radiation characteristics.
机译：提出了一种由10元蝶形偶极子天线和馈电网络组成的宽带圆极化阵列天线。将一对领结偶极子作为一个实体连接的窄补丁可用于实现高增益。为了获得宽带和平顶辐射图光束，通过应用自适应差分进化算法来优化沿馈源的幅度和相位分布。特别地，具有宽带相移性能的馈电网络被设计为满足从1.1到1.6 GHz的带宽要求。所提出的天线可以在整个工作频带上实现出色的阻抗匹配和轴比特性。此外，在仰角平面上覆盖±12°的同极化辐射方向图的纹波优于0.92 dB；增益也优于11.8 dB，旁瓣低于-13 dB。测量结果验证了设计理念，并表明所提出的阵列具有良好的辐射特性。

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