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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Design of a simple circularly polarised dual-frequency reconfigurable microstrip patch antenna array for millimetre-wave applications
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Design of a simple circularly polarised dual-frequency reconfigurable microstrip patch antenna array for millimetre-wave applications

机译：毫米波应用的简单圆极化双频可重构微带贴片天线阵列设计

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摘要

Reconfigurable antenna array has received a lot of attention in present-day wireless communication systems. In this study, a simple design of a four-element circularly polarised dual-frequency reconfigurable microstrip patch antenna array for millimetre-wave applications is proposed. The sequentially rotated series-parallel stub approach is employed in the feeding network design to provide symmetrical array elements positioning, and bringing about a good axial ratio of polarisation. Additionally, a matching branch per element is employed to generate spatial flexibility for element positioning and good impedance matching. Furthermore, due to high-cost constraints of Ka-band RF switches (such as PE42524 SPDT), switches are considered as transmission lines, and are placed within the fractal slots of each elements to reconfigure the frequency. The proposed array operates in two switching states: ON and OFF. Hence, it allows dual-frequency reconfigurability of 27 and 35 GHz for the ON and OFF states, respectively. A full array prototype was then fabricated on a Rogers R5880 substrate and tested in an anechoic chamber. Simulation and measurement results corroborate quite well in general. Patch antenna array gives much better result characterised by reconfigurable behaviour with associated return loss, radiation pattern characteristics, and < 3 dB axial ratio polarisation bandwidth than the single element. The proposed antenna array finds good applications in radar systems, satellite communications, and aerospace.
机译：可重构天线阵列在当今的无线通信系统中已经引起了很多关注。在这项研究中，提出了一种用于毫米波应用的四元件圆极化双频可重构微带贴片天线阵列的简单设计。在馈送网络设计中采用顺序旋转的串-并联短截线方法以提供对称的阵列元件定位，并带来良好的极化轴向比率。另外，每个元件采用一个匹配分支来产生空间灵活性，以实现元件定位和良好的阻抗匹配。此外，由于Ka波段RF开关（例如PE42524 SPDT）的高成本限制，开关被视为传输线，并放置在每个元件的分形槽内以重新配置频率。提出的阵列在两种开关状态下工作：ON和OFF。因此，它允许分别在ON和OFF状态下实现27 ​​GHz和35 GHz的双频可重构性。然后，将完整阵列的原型制作在Rogers R5880基板上，并在消声室内进行测试。通常，仿真和测量结果都得到很好的证实。与单个元件相比，贴片天线阵列具有更好的结果，其可重构行为以及相关的回波损耗，辐射方向图特性和<3 dB的轴向比率极化带宽。拟议中的天线阵列在雷达系统，卫星通信和航空航天中找到了良好的应用。

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