【摘要】 优化设计了一种性能良好的笼形中馈宽带天线.应用电磁场数值计算软件NEC2分析天线的增益和驻波,并将天线增益作为目标函数,通过构造合适的适应度函数利用遗传算法优化了天线的结构尺寸及阻抗匹配网络,使其在100~400 MHz频带内的电特性满足驻波比小于3.0,增益基本大于0 dB.制作了天线样机,理论计算结果与测量结果吻合良好.更多还原

【Abstract】 The center-fed cage antenna is optimized and designed.The electrical characteristics of the antenna,such as VSWR and Gain,are analyzed by Numerical electromagnetics code,version 2.Then the structure of the antenna and the matching network can be optimized by the Genetic Algorithm(GA),with the gain as the object function and a fitness function formed.The characteristics of VSWR are improved to be less than 3.0,and the gain are greater than 0.0 dB over the 100~400MHz frequency band.Finally a practical antenna is produced,with the calculated data in good agreement with the experimental data.更多还原