TITLE:
Brief Introduction of a New Kind of Glide Path Antenna
AUTHORS:
Chunqing Qu
KEYWORDS:
Glide Path Antenna, Near Field Monitor Antenna, Signal Analysis, DDM
JOURNAL NAME:
Open Journal of Antennas and Propagation,
Vol.6 No.3,
September
29,
2018
ABSTRACT:
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.