| 摘要: |
| 目前基于阵元间强耦合效应已设计出超宽带相控阵天线，但是其规模较大。针对规模小或者在扫描方向上规模小，如何增强阵元间耦合而实现超宽带相控阵天线的问题，采用平衡对踵Vivaldi天线(BAVA)作为天线单元，优化天线单元辐射金属的形状，并采用镜像法布阵天线单元设计出一个小规模4×16的斜极化超宽带相控阵天线。仿真和试验结果表明，采用的方法可以增强小规模超宽带相控阵天线的阵元间耦合效应，实现频率0.8f0~2.0f0驻波比小于2，法向增益达17.34~23.0 dBi，在±45°范围内实现无栅瓣扫描。该小规模超宽带相控阵天线已在实际工程中应用。 |
| 关键词: 超宽带相控阵天线 平衡对踵Vivaldi天线(BAVA) 阵元耦合 镜像技术 大角度扫描 |
| DOI： |
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| 基金项目: |
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| Design of a small scale UWB phased array |
| BAI Yanying |
| () |
| Abstract: |
| At present,a lot of ultra-wideband（UWB） phased arrays have been designed based on the strong mutual coupling between the array elements.But the UWB phased arrays are large.For a small scale or a small scale array in the scanning direction,the problem of how to achieve the ultra-wideband performances by enhancing the mutual coupling between the array elements is necessary to be developed.In this paper,Balanced Antipodal Vivaldi Antennas (BAVAs) are adopted.By optimizing the radiation metal shape and arranging the direction of the antenna elements with mirroring technique,a small 4×16 oblique polarization UWB phased array is designed.The simulation and experiment results show that this method can enhance the mutual coupling between the small UWB array elements.The array has a good voltage standing-wave ratio (VSWR) less than 2.0 in the frequency 0.8f0~2.0f0,norm gain 17.34~23.0 dBi,and large scanning angle beyond 45° without grating lobes.The designed small scale UWB phased array antenna has been applied in engineering. |
| Key words: ultra-wideband phased array balanced antipodal Vivaldi antennas (BAVA) mutual coupling mirroring technique wide angle scanning |
