Features of the construction of the noise compensation circuit of a small-sized active phased antenna array

Abstract

In an article the influence of active and passive interferences on the operation of X-band radar are considered. A new way to compensate for this interference is proposed. To implement this method, a new interference compensation unit based on horn antennas is developed. The experimental investigation results of unit work, as a separate device, and as part of the radar station are presented.

Monitoring of soil pollution caused by industrial enterprises in one of the districts of St. Petersburg

“…Therefore, we took soil samples from a soil layer of various depths from 0 to 30 cm. The soil samples were analysed using optical methods [33,[35][36][37][38][39] and X-ray and magnetic resonance spectroscopy [40][41][42]. This made it possible to determine the gross concentrations of several chemical elements that are hazardous to human health.…”

Monitoring the water quality in our rivers in urban areas

“…At these points or in the immediate vicinity of them, sampling was carried out and their composition was studied. For the study of water samples, various instruments were used in a stationary laboratory [30,31,33,36,43,[45][46][47][48].…”

Study of the impact of recultivated granite stone quarry dumps on the environment and agricultural land in the Leningrad region

“…Various reasons contribute to this [10][11][12][13][14][15][16][17][18][19]. One of them is the sharp increase in industry and population [7,12,13,16,[20][21][22][23][24][25][26]. This has led to an increase in the generation of electrical energy and pollution of areas [26][27][28][29][30][31][32].…”