随着空间技术的快速发展,对目标飞行器的跟踪与信息截获变得越来越重要。为了实现对目标飞行器的跟踪和信息截获,文中设计了一种超宽带、多极化、高增益的跟踪天线及馈源,采用基于印制板设计的对数周期天线作为单元,并使用八个单元组成圆环阵作为反射面天线的馈源,对结构和馈电幅相进行设计,从而实现线极化比幅跟踪、左旋圆极化接收、右旋圆极化接收三种工作方式。仿真结果表明:单元天线驻波小于2的相对带宽达到147%,次级方向图的圆极化轴比小于4 dB,交叉波束的交叉电平基本稳定在-3 dB~-8 dB。对该跟踪天线进行加工,并进行天线系统测试,实际测试结果与仿真吻合很好。

With the rapid development of space technology, tracking the target aircraft and intercepting the signal information content are increasingly important. In order to achieve the target spacecraft tracking and information interception, an ultra-wideband, multi-polarization, high gain tracking antenna and feed are presented, using the log-periodic antenna as a unit which is designed based on PCB. And eight log-periodic array antenna elements are used to constitute the reflector feed. The design of structure, amplitude and phase of feed are probed so as to realize three operation mode, those are linear polarization, left-handed circular polarization and right-handed circularly polarized. Simulated results show that the bandwidth which VSWR is less than 2 reaches 147%, and the axial ratio of secondary pattern is less than 4 dB, the cross level of cross beam stability between -3 dB to -8 dB. The proposed antenna is fabricated and measured. The measured results show a good agreement with the simulation.

TN82