Method for regulating access height of M-type glide path antenna

Abstract

The invention provides a method for regulating the access height of an M-type glide path antenna. The method comprises the following steps of starting an emitting machine; measuring the access heightvalue of the glide path antenna; determining the rotating degree required by the antenna according to the access height value, the access height tolerance range and the calculation result of the change quantity of the rotating angle on the access height; turning off the emitting machine; only regulating an upper antenna to rotate or regulating the upper antenna and a lower antenna to simultaneously rotate in opposite directions in the horizontal direction according to the required rotating degree by using a mechanical inclination and / or electric regulation inclination mode; turning on the emitting machine; measuring the access height value of a glide path antenna assembly after the regulation; and repeating the steps until the access height value is in the tolerance range. By performing inclination operation on the antenna in the horizontal direction, the access height value can be effectively changed; meanwhile, after the regulation, basically no influence is caused on other parameters formed by space signals radiated by the antenna; a great amount of high-altitude operation and operations such as repeated lateral offset and hanging height regulation on the antenna are avoided.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to a Chinese patent application for invention with application number 201910501875.2 filed on June 11, 2019, the entire contents of which are hereby incorporated by reference. technical field [0003] The invention relates to radio navigation technology, in particular to a method for adjusting entrance height in antenna signal debugging. Background technique [0004] In the instrument landing system, the anti-terrain interference ability of the M-type glide antenna is better than that of the zero reference and sideband reference antennas, so it is currently the most widely used. [0005] Since the M-type glide antenna assembly has three pairs of upper, middle and lower antennas, the antenna can be offset laterally, vertically, and twisted to achieve different correction effects. The function of the offset is to adapt to the horizontal and vertical slopes to the center of the runway. l...

AI Technical Summary

Problems solved by technology

However, after the M-type glide antenna assembly is installed, once the signal emitted by the glide antenna is measured by its commissioning verification, the entrance height (15+3m) corresponding to the glide slope formed by its spatial structure exceeds the limit. If the glide antenna assembly is readjusted to The longitudinal distance of the runway threshold requires a lot of time and resources; if the antenna is adjusted by changing the height, it will affect the glide angle; and changing the offset will affect the near-field structure

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