Brief Introduction of a New Kind of Glide Path Antenna

• 作者: Chunqing Qu
• 来源期刊: 天线与传播(英文)
• 学科: 医学
• 关键词: GLIDE PATH ANTENNA Near Field MONITOR ANTENNA Signal Analysis DDM
• 年，卷（期）: 2018,（3）
• 页码范围: 60-72
• 页数: 13页
• 分类号: R73

摘要

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.