Full‐angle beam scanning leaky‐wave antenna array based on spoof surface plasmon polaritons

作者：Jun Wang, Yuqi Yao, Xianglin Kong, Ruofeng Xu, Lei Zhao · 发表于：IET Microwaves Antennas & Propagation · 年份：2024 · DOI：10.1049/mia2.12512 · 被引用次数：5 · 研究领域：Plasmonic and Surface Plasmon Research、Optical Coatings and Gratings、Metamaterials and Metasurfaces Applications

Abstract A design scheme of high‐gain and full‐angle frequency beam scanning leaky wave antenna (LWA) and array is proposed based on spoof surface plasmon polaritons (SSPPs) slow‐wave transmission line (TL) for radar field applications. A row of complementary split ring resonators is periodically etched near the SSPPs TL, which can transform the fundamental mode of SSPPs TL to the fast‐wave region and radiate electromagnetic waves, realising the full‐angle frequency beam scanning performance. A 1‐to‐2 microwave power divider is designed to feed the LWA array and realised good impedance matching covers 5.8–9.4 GHz bandwidth. Simulation and experimental results indicate that the designed LWA array can realise full‐angle beam scanning range of 180° (−90° to 90°) with a scanning rate of 3.83°/% performance. The peak gain values of the designed LWA element and array are 11.4dBi and 14.6 dBi, respectively, and the radiation efficiency of LWA array is maintained more than 80% within the operation frequency band.