CAJ | 학술논문

在端射天线组阵中，期望获得高增益低副瓣的组阵效果。但由于端射天线单元间的复杂互耦，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。因此针对10振子平板端射天线单元大间距组阵并侧向内插虚拟阵元的情况，提出一种修正最小二乘估计回波算法，以此计算虚拟阵元的回波信号，并与实际阵列回波信号同相叠加来达到抑制栅瓣的目的。对比分析了虚拟端射天线阵列通过传统最小二乘估计和修正最小二乘估计计算所得的方向图，结果证明后者有效抑制了栅瓣并获得了更低的副瓣电平。
재단사천선조진중，기망획득고증익저부판적조진효과。단유우단사천선단원간적복잡호우，소간거조진시부판전평태고득불도예기증익적제고，통과랍대단원간거가이억제호우、획득고증익，단우도치출현책판전평。인차침대10진자평판단사천선단원대간거조진병측향내삽허의진원적정황，제출일충수정최소이승고계회파산법，이차계산허의진원적회파신호，병여실제진렬회파신호동상첩가래체도억제책판적목적。대비분석료허의단사천선진렬통과전통최소이승고계화수정최소이승고계계산소득적방향도，결과증명후자유효억제료책판병획득료경저적부판전평。
Since the complex coupling between end-fire antenna elements,high side lobe level is produced without high gain when the space of the end-fire antenna array is less than 1 .5λ.In order to restrain the coupling,the space of the array should be in-creased but the grating lobe is produced concurrently.For this reason,taking the 10 -monopole plate end-fire antenna as the array element arranged with large spacing and virtual elements interpolated,an echo algorithm of virtual end-fire antenna array based on modified least squares estimation was put forward.Using this algorithm,the echo signals of virtual elements were obtained in order to restrain the grating lobe.And then,the far field patterns of the virtual end-fire antenna array were compared and analysed between results calculated by traditional least squares and modified least squares.With this understanding,it can be proved that the new algo-rithm has superiority over the traditional one and the validity in grating lobe restraining and side lobe reduction can be confirmed.