ӨКПЕ-АУАТАМЫРЛАР АУРУЛАРЫН АНЫҚТАУҒА АРНАЛҒАН ҚҰРЫЛҒЫНЫҢ АНТЕННА ТОРЫНДАҒЫ ЭЛЕМЕНТТЕРДІҢ ӨЗАРА ӘСЕРІН ТӨМЕНДЕТУ

Abstract

This article discusses a device for diagnosing diseases of the bronchopulmonary system. The
structural elements of this device include "matrices" of transmitting and receiving antennas necessary for
transmitting signals through the patient's chest, the results of which are displayed in the form of breathing spectra.
A conclusion can be drawn about the incidence rate based on these results. However, during the experiments it has been found that the reception of signals from the antenna array shows a result differing from the theoretically
expected one as the adjacent inactive antenna dipoles with alternately emitting antennas affect the radiation pattern.
The purpose of this research is to simulate an antenna array in the MMANA-GAL software environment to find
a solution for reducing the influence of the neighboring inactive antenna dipoles. The simulation has been carried
out by introducing a load of 0 Ohm, 50 Ohm and 1000 Ohm into the phase center of the inactive antenna dipoles
with a subsequent analysis of their impact on the overall directional pattern. The results have shown that with the
load impedance of 1000 Ohm, the non-uniformity of the antenna gains at a zero-azimuth angle within 0.4 dB are
achieved, which brings the results closer to the reference value without the influence of the neighboring antennas.