空间映射算法优化八木天线  

Yagi Antenna Optimized by Space Mapping Algorithm

作　　者：李沙[1] 谢拥军[2] 岳亮[2] 李亚峰[2] 

机构地区：[1]中国科学院国家天文台,北京100012 [2]西安电子科技大学天线与微波技术国家重点实验室,陕西西安710071

出　　处：《现代电子技术》2009年第17期37-39,42,共4页Modern Electronics Technique

摘　　要：天线的最大增益是通过天线合理布局降低它们之间的干扰来实现的。工程中大多采用简单的数学模型并结合测试方法来进行天线布局设计的,但是这种方法效率低且不够精确。运用空间映射算法优化天线阵的位置参量,可以大大提高运算速率,节省时间。根据空间映射算法理论,提出并建立两种模型:一种是运算速度快,但不够精确的粗糙模型,另一种是运算速度较慢,但比较精确的精细模型。通过在这两种模型中建立映射,并利用遗传算法优化粗模型,兼顾精度和速度,从而得到最优解,为实际工程提供理论上的依据。Optimizing position of the antenna and the interference between antenna which can be reduced by proper position design to obtain maximal gain. Simple mathematical models are always used in practical engineering together with experimentation, sometimes these lead to low efficiency and poor precision. To use space mapping algorithm optimizing the position of the antenna, it can highly enhance the operation efficiency. There are two models based on the space mapping algorithm, One is the coarse model for fast computations, and the corresponding fine for a few more accurate and well - targeted simulations. A space mapping is established between these two models. The method is fast and precise, then,GA is used to optimize coarse model to get the optimized solution. It＇s a theoretic support for engineering.

关 键 词：空间映射算法 遗传算法 天线阵 最大增益 

分 类 号：TN82[电子电信—信息与通信工程]