SUPERWIDE-RANGE ABSORBER OF ELECTROMAGNET WAVES FOR ANECHOIC ROOMS AND SCREENED PREMISES Russian patent published in 2012 - IPC H01Q17/00 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio physics, antenna equipment and may find application in development of absorbers of electromagnetic waves used for equipment of superwide-range multifunctional anechoic rooms (AER) and screened premises, providing for performance of radio engineering measurements and tests of technical facilities for compliance with norms and requirements of electromagnetic compatibility. The proposed absorber of electromagnetic waves represents a triple-layer structure made of a dielectric material, a magnetic material and a metal substrate. The dielectric material has a flat shape or in the form of wedge-like elements from radio-absorbing foam glass with specified attenuation of 0.2-0.4 dB/cm at the frequency of 4 GHz with volume density of nor more than 190 kg/m³ and thickness of 200-350 mm. The magnetic material represents plates with thickness of 8.5-12 mm from magnesium-zinc ferrite containing oxides of magnesium, zinc and iron as the basis, and the additional titanium dioxide and barium carbonate.

EFFECT: invention provides for exclusion of radiation of radio signals beyond the limits of a chamber (room) and also providing for exclusion of reflection of radio signals from chamber walls with frequencies from 30 MHz to 375,000 MHz at the reflection ratio by capacity within the range of - 12 to - 40dB.

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