【摘要】 为一相控阵天线设计了频率选择表面(FSS)天线罩。通过对比分析原相控阵天线与引入不同结构FSS天线罩后天线/FSS系统的增益方向图,设计了FSS的单元结构类型和FSS天线罩的尺寸;同时,以天线/FSS系统副瓣电平最低为目标,优化了在相控阵天线扫描角为0°时,天线平面与FSS天线罩的距离参数,完成了相控阵天线/FSS天线罩系统的设计。以此为基础,对比分析了相控阵天线扫描工作时,加入FSS天线罩前后,相控阵天线的增益方向图,研究了有限尺寸FSS天线罩对相控阵天线的增益、主瓣电轴方向、副瓣电平以及瞄准误差等性能的影响。更多还原

【Abstract】 A frequency selective surface(FSS) radome is designed for a phased array antenna.By comparing the gain patterns of the original phased antenna and the Antenna/FSS system with different FSS radomes,the structure of the FSS element and the size of the FSS radome are determined;meanwhile,the distance between the phased antenna array and the FSS radome is optimized aiming at the lowest side-lobe level when the antenna scan angle equals to zero.After the Antenna/FSS system has been designed,the gain patterns of the phased array antenna with and without the FSS radome are compared,which indicates the influence of the finite FSS radome on the gain,main-lobe pointing,side-lobe level and aiming error of the phased array antenna.更多还原