一种新型低剖面双极化相控阵天线单元的设计  

Design of a New Low-profile Dual-polarization Phased Array Antenna Element

作　　者：杨丽娜[1] 姬江伟 YANG Lina;JI Jiangwei(China Airborne Missile Academy,Luoyang 471009,Henan,China;Henan Provincial Transportation Development Group Co.,Ltd.,Luoyang Branch,Luoyang 471009,Henan,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471009 [2]河南省交通运输发展集团有限公司洛阳分公司,河南洛阳471009

出　　处：《弹箭与制导学报》2022年第6期125-131,共7页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：针对目前双极化天线普遍存在低剖面结构、高极化隔离度实现的难题,提出一种新型的低剖面平面微带振子结构,两个正交的微带振子均采用同轴探针引至下方不同的带状线层进行馈电,并采用巴伦实现平衡至不平衡的转换。两个极化馈电层分层设计,实现了小于-35 dB的高极化隔离度。通过天线单元的设计及仿真,研究了关键参数对单元天线性能的影响,并加工1×8线阵试验件,由实物测试及数据对比分析,验证了此种天线的性能。结果表明:此天线结构剖面低,极化隔离度小于-20 dB,接近设计水平,结构改进可优化极化隔离度。The present study of dual polarized antenna is widespread low-profile structure, high polarization isolation implementation problem. In this paper, a novel low-profile planar microstrip dipole structure is proposed. Two orthogonal microstrip dipole arrays are fed by coaxial probes to different belt-line layers below, and barron is used to realize the transition from equilibrium to imbalance. Two polarization feeder layers are designed to achieve a high polarization isolation of less than-35 dB. The antenna unit is designed and simulated, and the influence of key parameters on the performance of the unit antenna is studied. The 1×8 linear array test piece is processed, and the performance of the antenna is verified by physical test and data comparison analysis. The results show that the structure profile of the antenna is low, and the polarization isolation degree is less than-20 dB, but the proposed structural improvement measures can optimize the polarization isolation degree, close to the design level.

关 键 词：低剖面 双极化 相控阵 交叉极化 微带振子 

分 类 号：TJ765[兵器科学与技术—武器系统与运用工程] TN821[电子电信—信息与通信工程]