RADAR SYSTEM FOR MEASURING AMPLITUDE DIAGRAM OF SCATTERING CROSS-SECTION OF OBJECTS Russian patent published in 2014 - IPC G01S13/00 

FIELD: radio engineering, communication.

SUBSTANCE: system comprises series-connected receiver, computer, pulse transmitter, antenna switch and antenna, wherein the second output of the antenna switch is connected to the input of the receiver, as well as a rotating device with a support, the measured object and a control panel, which is connected by the first, second and third outputs to the second input of the transmitter, the input of the rotating device and the second input of the computer, respectively, the computer also being connected by the third input to the output of the rotating device, and also having, on the underlying surface at the centre of the first zone of a Fresnel antenna, a radar-absorbent device whose width is selected not less than the shorter axis of ellipse of the first zone of the Fresnel antenna, and the height is defined by the formula H_e=axH₀/(a+R-R_e), where a is the longer semi-axis of ellipse of the first zone of the Fresnel antenna, H₀ is the height of position of the measured object over the underlying surface, R is the distance between the antenna and the measured object, R_e is the distance between the antenna and the radar-absorbent device; the system also includes a radar-absorbent cloak on the top part of the radar-absorbent device.

EFFECT: high accuracy of measuring the amplitude diagram of the scattering cross-section of objects by eliminating the effect of the illuminating field specularly reflected from the underlying surface and back-scattered by the top part of the radar-absorbent device, as well as electromagnetic interaction between the measured object and the top part of the radar-absorbent device on measurement results.

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