Effect of Wall-Surrounded Slot on Stepped Narrow Wall for Bandwidth Enhancement of Partially Parallel-Feeding Waveguide Traveling-Wave Array
Effect of Wall-Surrounded Slot on Stepped Narrow Wall for Bandwidth Enhancement of Partially Parallel-Feeding Waveguide Traveling-Wave Array
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DOI：
10.1109/tap.2017.2710216
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发表时间：
2017-05
影响因子：
5.7
通讯作者：
Y. Hirayama;K. Sakakibara;Haruki Umemura;Katsuhiro Miyazaki;N. Kikuma
中科院分区：
文献类型：
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作者：
Y. Hirayama;K. Sakakibara;Haruki Umemura;Katsuhiro Miyazaki;N. Kikuma
行波波导槽阵部分并联馈电系统的优点是减少了槽阵激励相位对波导的频率依赖性，从而获得宽带增益和辐射方向图。然而，传统的阵列元件后加载窄带辐射槽限制了阵列的总带宽。本文提出了一种在波导阶梯窄壁上的宽带环壁槽。通过电磁仿真分别分析了阶跃对波导窄壁和围壁缝隙的影响。在波导中心组装的波导的天线配置允许用金属电镀的塑料成型制造。通过对天线性能的测试，验证了该天线在毫米波波段的可行性。
A partially parallel-feeding system of traveling-wave waveguide slot array has an advantage to reduce the frequency dependence of excitation phase of slots cut on the waveguide, which results in broadband feature of gain and radiation pattern. However, a conventional narrowband post-loaded radiating slot for array element limits the overall bandwidth of the array. A broadband wall-surrounded slot on a stepped narrow wall in the waveguide is proposed in this paper. The effects of the step on the waveguide narrow wall and the wall-surrounding slot are evaluated individually by electromagnetic simulation in this paper. The proposed antenna configuration of the waveguide assembled at the waveguide center allows fabrication by plastic molding with metal plating. The antenna performance is measured to confirm the feasibility of the proposed antenna in the millimeter-wave band.