一种Ku频段变极化有源相控阵天线的设计与验证  

Design and Experimental Study of A Ku Band Polarization Agile Phased Array for Satellite Communication

作　　者：施伟[1,2] 钱祖平[1] 周骏[3,4] 赵守俊 项阳 曲新波 

机构地区：[1]解放军理工大学通信工程学院 [2]南京电信技术研究所 [3]东南大学毫米波国家重点实验室 [4]南京电子器件研究所 [5]不详

出　　处：《现代军事通信》2014年第4期24-31,共8页

摘　　要：提出一种Ku频段（12．25GHz～12．75GHz）低剖面变极化有源相控阵天线，不需要机械伺服部件，波束指向和线极化方向同时可调。天线单元采用双层矩形微带天线，由两个探针正交馈电，便于进行极化合成，仿真表明，天线单元的端口阻抗带宽达16％。在7×7的小阵环境中，对中心天线单元的结构参数进行仿真设计，以补偿阵元互耦在波束扫描和变极化过程中对馈电端口阻抗的影响。提供了基于低温共烧陶瓷（LTCC）技术的小型极化跟踪模块，并给出了测试结果。研制了7×7元小规模的变极化有源相控阵天线，给出了波束扫描和变极化方向图的测试结果。实验表明，天线波束的仰角扫描范围达50。，变极化波束的扫描增益大于16．0dBi，阵面的辐射效率大于50％。This paper presents a low profile polarization agile active phased array for Ku band （12.25 GHz 12.75 GHz） satellite communication. The phased array has the capability of beam tracking and polarization tracking. The radiation element is stacked rectangular patches of two layers, orthogonally fed by two probes, which can be used to produce linear polarization of arbitrary orientation. The impedance bandwidth of 16% can be obtained for the element. The parameters for central element of the small 7 × 7 array are optimized, so as to compensate for the effect of the mutual coupling on impedance of the element during beam scanning and polarization agility. A LTCC-based polarization tracking module and a planar power combining network are proposed. An active phased array prototype with agile polarization is developed. The measured polarization agile patterns of the prototype are given. The polarization agile beam can be steered in the elevation up to 50o. When the beam is steered, the gain is greater than 16.0 dBi, and the aperture efficiency is greater than 50%.

关 键 词：变极化 有源相控阵 互耦 低温共烧陶瓷(LTCC) 

分 类 号：TN821.8[电子电信—信息与通信工程]