Обеспечение электромагнитной совместимости в системах ретрансляции радиосигналов

Abstract

The features of functioning of telecommunications systems retransmission of informative signal by the intermediate conversion in other radio frequency range are observed. It is shown that at designing of these systems, taking into account the necessary electromagnetic compatibility is necessary to use a single nonlinear model, which allows to take into consideration the influence of stray fields on the characteristics of nonlinear elements. It is educed, that distortion of volt-ampere descriptions of semiconductor mixer under acting of the strange electromagnetic field will reduce the efficiency of frequency conversion. The analysis of converting of radio signal frequency in other frequency range is conducted. Intermodulation noise levels on combination frequencies which through parasite feed-backs are able to worsen spectral efficiency of informative channel are appraised.