METHOD OF DETERMINING AN ADDITIONAL SIGNAL ATTENUATION COEFFICIENT IN A RADIO COMMUNICATION CHANNEL WITH AN AIRCRAFT Russian patent published in 2019 - IPC G01R29/00 

FIELD: measurement technology.

SUBSTANCE: invention relates to the field of radio engineering measurements. Method for determining the coefficient of additional signal attenuation in a channel of radio communication with an aircraft is that by means of a transmitting device located on an aircraft, signals are transmitted through a transmitting antenna at a given frequency, in the external receiving device using the receiving antenna the time of arrival of signals is recorded, based on which the time diagram of signals reception is built, further from the timing diagram of reception determining the moments corresponding to the beginning or end of receiving signals, for given time points, power of signals at the input of the receiving device is calculated without taking into account additional attenuation of signals, which includes reduction of signal power as a result of passage through the plasma shell formed at the aircraft antenna opening, and reduced power of signals due to reduced gain of antenna of aircraft, wherein actual power of signals at input of receiving device at time points corresponding to beginning or end of reception of signals is received equal to sensitivity of receiving device, further, coefficient of additional signal attenuation is determined, which is equal to ratio of calculated power to actual one.

EFFECT: possibility of determining the coefficient of additional attenuation of signals in a channel of radio communication with an aircraft in conditions of limited measurement time when moving the receiving and transmitting antennas relative to each other in the process of measurements, taking into account the effect of intense aerothermodynamic loads on one of the antennae.

1 cl, 2 dwg