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Some experimental results obtained with a model of nanosecond radar as applied to radio-wave imaging


V.A. Vdovin – Ph.D. (Phys.-Math.), Leading Research Scientist, Kotel'nikov Institute of Radioengineering and Electronics of RAS. E-mail:
V.V. Kulagin – Ph.D. (Phys.-Math.), Senior Research Scientist, Kotel'nikov Institute of Radioengineering and Electronics of RAS; Sternberg Astronomical Institute of Moscow State University; Sternberg Astronomical Institute, Moscow. E-mail:
E.V. Mitrofanov – Post-graduate Student, Kotel'nikov Institute of Radioengineering and Electronics of RAS. E-mail:
V.A. Cherepenin – Dr.Sc. (Phys.-Math.), Professor, Corresponding Member RAS, Kotel'nikov Institute of Radioengineering and Electronics of RAS. E-mail:

The active radio-wave imaging systems built on the base of radio locator with the length of radio pulse about several nano seconds can be used in airports, to control the runways of the airdromes, to increase the safety of flights on small heights, to control the areas of water ports, also during the military operations and to control the combat situation. The interest of building the active radio-wave imaging systems is based on the advantage of short pulses usage, which allows increasing the range resolution up to ten-fifteen centimeters. In locators with ultra-short radio pulses, the reflection of an electromagnetic signal from different spots of located object leads to collapse of a spatial coherence; as a result reflected radiation doesn’t interfere, and with the appropriate computer data processing, the shape and outline of the object can be seen. Experimental results for defining radio-wave imaging system characteristics during scanning elements of real urban objects with nanosecond radar system are presented. Real objects (walls of a building, a metal door, a Dewar bottle, etc.) were irradiated; as a result, the high range resolution and high precision of measuring the distance to the aim were demonstrated. The ability of short pulse locator to work from the zero range was confirmed. Also, azimuth scanning a building wall with the windows was conducted showing that real image can be reconstructed from dependence of the square of the reflected amplitude on the angle. On the basis of conducted experiments, a conclusion was made that short pulse locator with the range resolution of 30-40 cm can be created, which will be the base for building perspective active radio-wave imaging systems.

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