METHOD OF MEASURING RADAR CROSS-SECTION OF LARGE OBJECTS IN ANECHOIC CHAMBER Russian patent published in 2013 - IPC G01S13/10 

FIELD: radio engineering, communication.

SUBSTANCE: method, which involves irradiating a large object mounted on a rotary support and determining power of the reflected signals (P_refl) when the large object rotates about a vertical axis, further includes calibration when the large object is stationary at a moment in time when the projection of the large object on the irradiation side is closed by a radar absorbent screen and residual reflection is compensated for; a reference reflector with a known radar cross-section (EPR - σ_ref) is mounted in front of the radar absorbent screen and power P_ref, of the signal reflected from the reference reflector with a known radar cross-section (EPR - σ_ref) is determined and the radar cross-section of the large object is calculated using the formula: $${\sigma }_{refl}={\sigma }_{ref}\frac{P_{refl}}{P_{ref}}.$$

EFFECT: high measurement accuracy owing to one-time installation of the object in an anechoic chamber and performing calibration without removing the measurement object from the anechoic chamber.

1 dwg