Brief Introduction of a New Kind of Glide Path Antenna

A new kind of image type glide path beacon subsystem of Instrument Landing System (ILS) was reported. Capture effect is designed to overcome far-field (FF) reflectors and rising terrain. Low angle CSB signal was highly depressed, was ?41 dB at 1? comparative to the max value. Both Carrier and Side Bands (CSB) and Side and Bands Only (SBO) signals were radiated by three antennas. Difference in Depth of Modulation (DDM) provided good linear variation around glide path angle (θ). At near field area, the site of near-field (NF) monitor was just about 57 m in front of the system, needed less length of reflection plane than that of M-array system, result from the system had only 90% of the M-Array antenna height.

浅析有源相控阵天线的内监测技术

有源相控阵天线内监测系统具有受外界环境干扰小、可快速展开工作的优点,越来越适用于现代雷达的使用需求。内监测技术可以实现超低副瓣有源相控阵天线的校准。文中对有源相控阵内监测技术进行了研究,阐述了内监测系统的功能、设计原则、基本原理和硬件组成,介绍了耦合器的主要实现形式,提出了基于近场的耦合比测试方法和基于耦合比的监测校准方法,并分别给出了提高精度的措施。测试结果表明,应用内监测技术校准后的天线性能与近场实测结果非常吻合,对于相控阵天线研制有一定的工程指导意义。