INSTALLATION FOR DETERMINATION OF RADIO PROTECTIVE PROPERTIES OF MATERIALS IN THE MICROWAVE RANGE Russian patent published in 2023 - IPC G01R27/26 

FIELD: measuring radioprotective properties.

SUBSTANCE: invention is related to building materials in the microwave range, and can be used in the production of building materials, as well as for demonstration and educational purposes. The essence of the proposed solution lies in the fact that the complex for determining the radioprotective properties of materials in the microwave range includes a housing 10, a vector network analyser 1 connected to a control computer 11 through a communication channel, emitting 4 and receiving 7 horn antennas and cell 6 for placing sample 5. In the proposed solution, the radio-absorbing housing 10 has double walls made of a radio-transparent material, the gap between which is filled with a water-saturated superabsorbent polymer, while the emitting and receiving horn antennas are connected by wire communication channels with a vector analyser and coaxially placed in the housing on both sides of the sample placement cell, and the receiving horn antenna has the ability to move linearly along an axis perpendicular to the sample placement plane, and the radiating horn antenna is placed at a distance of less than 5 mm from the sample under study. The design of the case with double radio-transparent (for example, from polymethyl methacrylate or polystyrene) walls makes it possible to fill the gap between them with water-saturated superabsorbent polymers (for example, sodium polyacrylate or potassium polyacrylate), which in turn significantly reduces the power of electromagnetic radiation outside the case and prevents the penetration of waves from the outside to the receiving horn antenna and, as a result, reduces the introduced noise during measurements. The ability to move the receiving horn antenna makes it possible to compensate for the phase error introduced when the sample is placed in the measuring cell. Placing a radiating horn antenna at a distance of less than 5 mm from the test sample minimizes the effect of diffraction on measurement accuracy.

EFFECT: expansion of technological capabilities by minimizing the influence of external factors, wave effects and reflections inside the installation case when determining the radioprotective characteristics of the main types of building materials in the microwave range.

1 cl, 2 dwg