人工表面等离激元馈电的宽带低旁瓣全角度波束扫描天线

提出了一款人工表面等离激元馈电的宽带全角度低旁瓣波束扫描天线。采用人工表面等离激元馈电卵圆形辐射贴片阵列和对跖Vivaldi辐射器，在快波区激发高次谐波实现漏波辐射，在慢波区呈现低损耗能量传输效果激励对跖Vivaldi的端射模式，从而实现了在4~12 GHz（相对带宽100%）内全角度（180°）波束扫描。进一步，通过对卵圆形辐射贴片进行锥形排布降低了天线在漏波辐射时的旁瓣水平。仿真结果表明，所设计的全角度波束扫描天线能够在4~12 GHz内旁瓣水平均在-10 dB以下。该天线在雷达探测、目标跟踪等应用场景具有重要应用潜力。

A Wideband Full-Angle SSPP-Fed Beam-Scanning Antenna with Low SLL

A wideband and wide-angle beam-scanning antenna with low sidelobe levels (SLL) fed by spoof surface plasmon polaritons (SSPP) is designed. The SSPP feeding lines are adopted to excite the oval radiating patch array in the fast wave zone, whereas its low loss transmission in the slow wave zone is used to excite the spoof plasmonic antipodal Vivaldi antenna (AVA), realizing the beam scanning angle of 180° within 4~12 GHz (a relative bandwidth of 100%). And by arranging the oval radiating patches in a tapered way, the SLL during leaky-wave radiation is effectively reduced. The simulation results show that the SLL of the designed full-angle beam-scanning antenna is below -10 dB within the 4~12 GHz frequency band. Such antenna has considerable potential in application under condition of radar detection and target tracking.