Many technologies of electrically small antennas and wide band antennas are discussed in theory , simulation and experiment . and some novel electrically small or wide band antennas are proposed . the loaded monopole is analyzed in depth integrating the genetic algorithm ( ga ) with the method of moments ( mom ) in order to increase the gain and decrease the vswr of antennas used at hf / vhf band 在本论文的研究过程中,通过合理利用各种现有的天线宽带化和小型化的理论成果、有效的综合各种技术措施,运用矩量法和遗传优化算法等数值方法,深入研究了加载单极子天线问题,旨在全面提高高频/甚高频频段内的天线增益和降低电压驻波比,以获得较高增益的、基本满足驻波要求的小型超宽带天线。
