RADIO-WAVE ABSORBING COAT, METHOD FOR ITS PRODUCTION AND CONTROLLING OF ITS PROPERTIES, AND DEVICE FOR REMOTE MEASUREMENT OF REFLECTING PROPERTIES OF COATS ON EQUIPMENT IN MICROWAVE RANGE Russian patent published in 2000 - IPC

FIELD: electromagnetic wave absorbers for radar engineering. SUBSTANCE: radio-wave absorbing coat is made built up of absorbing- material layers; first layer is applied to electromagnetic-wave absorbing surface and remaining ones sequentially cover the latter; number of layers depends on desired absorptivity of coat. Material of mentioned layers includes latex-base synthetic adhesive ELATON as binder and powdered ferrite or carbonyl iron as magnetic filler, their proportion being as follows, mas.%: synthetic adhesive ELATON, 80-20; powdered ferrite or carbonyl iron, 20-80. Method for producing radio-wave absorbing material and controlling its properties includes application of three or four first layers of mentioned material with definite proportion of ingredients on metal substrate, measurement of absorptivity of coat obtained, its comparison with design value for particular number of layers and proportion of material ingredients. If measured absorptivity is higher than design value, some portion of upper layer is removed until desired absorptivity is attained; if it is below design value, proportion of ingredients in radio-wave absorbing material is chosen to ensure desired absorptivity, and procedure is repeated with as many layers applied as desired to obtain desired absorptivity of coating as a whole. Remote reflective-properties measuring device has microwave oscillator, mixer, amplifier, parabolic transceiver mirror antenna with feed, laser target indicator, first and second video cameras, video monitoring device, frequency modulator, power splitter, circulator, analog-to-digital converter, synchronizer, resolver, and radio-absorbing members. The latter are, essentially, flexible and other mats, curtains, dome- and cone-shaped caps whose surfaces mount screen reflecting electromagnetic waves such as metal grid coated with radio-wave absorbing material. EFFECT: facilitated manufacture, reduced mass, improved radio-wave absorbing properties. 4 cl, 6 dwg