摘要
在端射天线组阵中,由于天线单元间的复杂互耦,端射天线小间距组阵时副瓣电平抬高得不到预期增益的提高,通过拉大单元间距可以抑制互耦、获得高增益,但又导致出现栅瓣电平.基于此,提出一种基于平板端射天线内插虚拟阵元的新型组阵方法——数字虚拟端射组阵方法,并对侧向组阵时该方法的数字波束合成结果与实际端射天线阵的三维电磁仿真软件(CST)仿真结果进行对比分析,最后,通过实验测试验证了该方法对于抑制端射天线阵栅瓣的有效性.
Since the complex coupling between end-fire antenna elements, high side lobe level is produced without high directivity and gain when the space of the end-fire antenna array is less than 1.5λ. In order to improve the gain and restrain the coupling,the space of the array should be increased but the grating lobe is produced concurrently. Digital virtual end-fire antenna array a new method that virtual element interpolation based on the plate end-fire antenna array is proposed to restrain the grating lobe. Then, the far field patterns are compared and analyzed between calculation result of the virtual end- fire antenna array and CST simulation result of the original end-fire antenna array. Fi nally, from the simulations and practical measurement, the validity of the new method in grating lobe restraining is confirmed.
出处
《电波科学学报》
EI
CSCD
北大核心
2014年第4期663-667,共5页
Chinese Journal of Radio Science
关键词
端射天线
虚拟阵元
栅瓣抑制
end-fire antenna
virtual element
grating lobe restraining
