State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, China.
School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China.
Sensors (Basel). 2023 May 17;23(10):4827. doi: 10.3390/s23104827.
The electrical performance of the feed array is degraded because of the position deviation of the array elements caused by manufacturing and processing, which cannot meet the high performance feeding requirements of large feed arrays. In this paper, a radiation field model of the helical antenna array considering the position deviation of array elements is proposed to investigate the influence law of position deviation on the electrical performance of the feed array. With the established model, the rectangular planar array and the circular array of the helical antenna with a radiating cup are discussed and the relationship between electrical performance index and position deviation is established by numerical analysis and curve fitting method. The research results show that the position deviation of the antenna array elements will lead to the rise of the sidelobe level, the deviation of the beam pointing, and the increase of the return loss. The valuable simulation results provided by this work can be used in antenna engineering, guiding antenna designers to set optimal parameters when fabricating antennae.
馈源阵的电性能由于制造和加工引起的阵元位置偏差而降低，无法满足大馈源阵的高性能馈电要求。本文提出了一种考虑阵元位置偏差的螺旋天线阵的辐射场模型，以研究位置偏差对馈源阵电性能的影响规律。利用所建立的模型，对带有辐射杯的螺旋天线的矩形平面阵和圆形阵进行了讨论，并通过数值分析和曲线拟合方法建立了电性能指标与位置偏差的关系。研究结果表明，天线阵元的位置偏差会导致旁瓣电平上升、波束指向偏差以及回波损耗增加。这项工作提供的有价值的模拟结果可用于天线工程，指导天线设计人员在制造天线时设置最佳参数。
