【作者】 饶升林； 徐乾坤； 薛靖铠； 陈嘉豪； 刘一川； 陈星；

【Author】 RAO Shenglin;XU Qiankun;XUE Jingkai;CHEN Jiahao;LIU Yichuan;CHEN Xing;Sichuan University;Institute of Electronic Engineering,China Academy of Engineering Physics;The 10th Research Institute of China Electronics Technology Group Corporation;

【机构】 四川大学； 中国工程物理研究院电子工程研究所； 中国电子科技集团公司第十研究所；

【摘要】 为了满足雷达系统对天线提出的超宽带低主副比需求,提出了一种全金属结构双极化超宽带稀疏阵列。天线主要由反射器、辐射振子和馈电条三部分构成。辐射振子为磁电偶极子,其弯折的磁偶极子上加载有宽边的矩形缝隙,同时其水平电偶极子上引入了多次边缘裁剪,以调节其阻抗匹配。反射器底板设计为下沉式,同时在其边缘引入L型金属围栏,使其与水平电偶极子末端形成较强的金属电容以抵消低频的感抗,实现低频带宽的扩展。天线通过馈电条将能量耦合给辐射振。然后将单元方向图提取并利用粒子群阵列稀疏算法多次迭代得到阵列布局。仿真结果表明,阵列实现了S波段主副比优于18dB,且阵列增益变化范围为11.7-17.8dBi。更多还原

【Abstract】 To meet the ultra-wideband and low sidelobe level requirements of radar systems for antennas,a fully metallic dual-polarized ultra-wideband sparse array is proposed.The antenna is primarily composed of three parts:a reflector,radiating elements,and feeding strips.The radiating element is a magneto-electric dipole.Its folded magnetic dipole is loaded with wide rectangular slots,while multiple edge-truncations are introduced on its horizontal electric dipole to adjust impedance matching.The reflector baseplate is designed to be recessed,and an L-shaped metallic fence is incorporated along its edges.This structure forms a strong metallic capacitance with the ends of the horizontal electric dipole to compensate for inductive reactance at low frequencies,thereby achieving extended low-frequency bandwidth.Energy is coupled to the radiating elements via the feeding strips.The array layout was determined through multiple iterations of a Particle Swarm Optimization(PSO) sparse array algorithm.Simulation results demonstrate that the array achieves a peak sidelobe level(PSLL) better than 18 dB in the S-band and better than 13 dB across the entire operating band,with a gain variation range of 11.7 to 17.8 dBi.更多还原