Fiber-optical system for transmitting heterodyne signals in active phased antenna arrays of radar stations

Abstract

For transmitting reference and heterodyne signals of active phased array antenna is developed a new design of a fiber-optic communication system. In article are considered of transmission features of reference and heterodyne signals in is developed by us of new design of a fiber-optic communication system. The data of experimental investigation are presented.

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

“…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]. Because of the need to increase mining for industrial needs, one of the factors of this impact is the excavation of rocks from quarries and the storage of them and waste in dumps.…”

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

“…Soils in the city are affected by the same factors that affect the natural undisturbed soils. However, in cities, anthropogenic factors of soil formation prevail over natural ones [30]. Features of soil formation processes in urban areas are soil disturbance due to the movement of horizons from natural phenomena, deformation of soil structure and the ordering of soil horizons.…”

Assessment of the level of soil pollution of agricultural lands Kotlin Island

“…Currently, there is a sharp increase in the technogenic load on the Earth's ecosystem [1][2][3][4][5][6][7][8]. There are many reasons for the increase in this load [7][8][9][10][11][12][13][14][15]. In most cases, they should be considered together, since there is a connection between them [9][10][11][12][16][17][18][19][20][21].…”