基于遗传算法的非对称多波束反射阵天线设计  

Design of Asymmetrical Multi-beam Reflectarray Antenna Using GA

作　　者：吴君默 雷雪[1] 张广求 

机构地区：[1]信息工程大学信息系统工程学院,郑州450002

出　　处：《微波学报》2015年第1期40-43,共4页Journal of Microwaves

摘　　要：针对传统方法设计的多波束反射阵天线增益低、波束偏移大、要求波束对称等问题,通过引入全局优化算法中的遗传算法对反射阵相位分布进行优化,以完成非对称多波束反射阵天线设计。为验证其有效性,设计并制作了一副Ku频段,波束指向分别为θ1=25°,1=0°和θ2=15°,2=180°的非对称双波束反射阵天线。测试和仿真结果较吻合,天线在中心频点的增益为26.03dBi,效率达到28.04%,1dB增益带宽和3dB轴比带宽均能覆盖11.3~12.3GHz(8.3%),实测波束指向为θ1=24.3°,1=0°和θ2=15°,2=180°,波束偏移0.7°。结果表明遗传算法能有效完成非对称多波束反射阵天线设计。For multi-beam reflectarray antennas using conventional designing methods,they have problems like low antenna gain,big beam squint,requirement of symmetrical pattern beams and so on.In this paper,we introduce genetic algorithm(GA) method to optimize the phase distribution of the reflectarray to accomplish the design of multi-beam reflectarray.In order to verify the effectiveness of the design method,we design and manufacture a Ku-band,beams pointing at θ1=25°,1= 0° and θ2= 15°,2= 180° asymmetrical dual-beam reflectarray antenna.Simulating results and testing results match well,the antenna gain at center frequence is 26.03dB,the efficiency reaches 28.04%,both the 1dB gain bandwidth and 3dB axis-ratio bandwidth can cover the range of 11.3 ~ 12.3GHz(8.3%),test beams point at the directions of θ1= 24.3°,1= 0°and θ2= 15°,2= 180°,beam squint is 0.7°.The result show that GA method can achieve asymmetric multibeam reflectarray design effectively.

关 键 词：非对称多波束 反射阵 遗传算法 

分 类 号：TN820.15[电子电信—信息与通信工程]