| 基于遗传算法的栅格天线阵旁瓣电平优化方法 |
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| 引用本文： | 郑文超,郎量,李青侠,桂良启.基于遗传算法的栅格天线阵旁瓣电平优化方法[J].微波学报,2011,27(5):6-9. |
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| 作者姓名： | 郑文超 郎量 李青侠 桂良启 |
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| 作者单位： | 华中科技大学电子与信息工程系,武汉,430074 |
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| 基金项目： | 国家863项目(2008AA12A213); 国家自然科学基金(410011954,0806069) |
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| 摘 要： | 在推导出栅格天线阵列方向图的基础上,提出一种基于遗传算法的栅格天线阵旁瓣电平优化的方法。此方法首先简化栅格天线阵物理模型,给出等效模型下的阵列方向图,然后以栅格天线阵的短边电流幅度为优化参量,以阵列天线方位面的副瓣电平为适应度函数,利用遗传算法的最优化搜索得到满足副瓣要求的电流幅度,再通过电流幅度计算辐射单元阻抗,最终设计出满足要求的低旁瓣栅格天线阵。为了验证该方法的有效性,对一种频扫微带栅格天线进行了优化,在电磁仿真软件中对优化后的天线进行了仿真,根据设计结果加工制作了原型天线并进行了测试,测试结果显示优化后天线阵的副瓣电平降低了5dB,优化效果明显。
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| 关 键 词： | 栅格阵列天线 遗传算法 低副瓣 电流幅度 |
An Optimization Method for Sidelobe Reduction of Wire Grid Array Antenna Using Genetic Algorithm |
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| ZHENG Wenchao,LANG Liang,LI Qingxi,GUI Liangqi.An Optimization Method for Sidelobe Reduction of Wire Grid Array Antenna Using Genetic Algorithm[J].Journal of Microwaves,2011,27(5):6-9. |
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| Authors: | ZHENG Wenchao LANG Liang LI Qingxi GUI Liangqi |
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| Affiliation: | ZHENG Wen-chao,LANG Liang,LI Qing-xia,GUI Liang-qi(Department of Electronics and Information Engineering,Huazhong University of Science and Technology,Wuhan 430074,China) |
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| Abstract: | An optimization method which is based on Genetic Algorithm(GA) for sidelobe reduction of wire grid array antenna is proposed.In this method,a model to analyze the far-field of the wire grid array antenna is reported.Current amplitudes which fit the designed sidelobe are obtained by GA.Current amplitudes of each short side are treated as variables and sidelobe level in azimuth plane is treated as fitness function of GA.Then the current amplitudes are used to calculate the impedances of each short side so as ... |
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| Keywords: | wire grid array antenna genetic algorithm low sidelobe level current amplitude |
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