用遗传算法综合波束赋形基站天线  

Synthesis of Shaped Beam Base Station Antenna Using Genetic Algorithm

作　　者：卜安涛[1] 史小卫[1] 刘英[2] 沈宗珍 肖良勇 

机构地区：[1]西安电子科技大学601试验室,陕西西安710071 [2]西安电子科技大学天线所,陕西西安710071 [3]陕西西安海天天线科技股份有限公司研究院,陕西西安710075

出　　处：《电子学报》2003年第9期1310-1312,共3页Acta Electronica Sinica

基　　金：国家自然科学基金 (No .69971 0 1 7);西安海天天线股份有限公司资助

摘　　要：本文利用遗传算法对不等间距阵列天线进行优化 ,实现了一种赋形波束基站天线。天线模型用矩量法分析 ,并采用遗传算法综合天线方向图 .在优化过程中通过合适的目标函数 ,保证了天线较好的频段特性 ,并压制干扰区副瓣、填充服务区零值、控制后瓣。优化后天线在整个工作频段上实际性能为 :上副瓣小于 - 18.32dB ,填充零点大于 - 14 .71dB ,前后比小于 - 2 6dB .与以前的方法相比 ,本文的结果更接近实际情况 ,并且该方法可应用于较复杂的天线 .A shaped beam base station antenna is realized with the unequal spacing array using an optimization technique based on genetic algorithms. Antenna model is evaluated by using the Method of Moment (MoM). During the antenna optimization process, an appropriate fitness function is used to suppress the sidelobe in interference zone, fill the null points in service zone and control the back lobe, to get satisfactory pattern shape in the whole frequency band. As a result of this optimization, a practical shaped beam antenna with suppressed sidelobe smaller than-18.32 dB and backlobe-26 dB, filled null point larger than-14.71 dB is achieved. The proposed method is closer to reality compared with previous methods and can be used to optimize complicated antennas. The result is very useful for engineering and theoretic analysis.

关 键 词：遗传算法 赋形波束 基站天线 矩量法 副瓣抑制 零值填充 

分 类 号：TN045.1[电子电信—物理电子学]