摘要
飞行器载雷达天线实现超宽带圆极化是非常困难的,能在反射面系统或馈源口面加载一种平面圆极化装置,是一种极合理的设计.本文利用折线栅的等效电纳对多层折线圆极化器进行等效,根据其等效网络,采用罚函数法和变尺度法对四层板折线圆极化器进行优化设计,得出了不同频率范围内极化器的结构尺寸,并计算了相应的轴比.计算机模拟设计结果表明,在2～18GHZ频率范围内,所设计的圆极化器轴比低于1dB,具有良好的实用价值.
It is difficult to make the radar antenna carried by aircrafts circular polarized. The reasonable method is to add a plane circular polarizer in the plate of the reflecting system or of the feeding source. In this paper, the equivalence of a meanderl-ine circular polarizer with multiple sheets is performed by using the equivalent susecptamce of the meander-line lattice. Based on the equivaient network, the optimum design of the four-sheet meander-line circular polarizer is implemented by means of SUMT method and BFGS method. We have obtained the structure dimensions of the circular polarizer and calculated its axial ratio within the various frequency ranges. The results of computer simulation show that within the frequency range of 2~ ISGHz, the axil ratio of a circular polarizer designed is less than 1 dB. It has better practical value.
出处
《系统工程与电子技术》
EI
CSCD
1997年第1期17-24,共8页
Systems Engineering and Electronics
关键词
极化器
计算机辅助设计
雷达天线
天线
Super wideband, Micander-line lattice, Circular polarizer, Computer aided design.
