Radio-absorbing materials
Purpose
The materials were designed for effective solution of practical problems related to electromagnetic compatibility and protection of aircraft elements and units from the effects of electromagnetic radiation in a wide frequency range. The materials can be used for coating of the internal niche of meteorological radars in civil aircrafts, as an absorber in the development of compact anechoic chambers, matched loads, etc.
Characteristics
The operation principle of the absorber is based on matching of the impedances of free space and the absorber, while effective absorption of microwave radiation is carried out due to high ohmic losses in the material.
Microwave absorbers are nonflammable and characterized by low density and high elasticity.
The peculiarity of this class of absorbers is thermal stability in oxidizing envi-ronments up to 400-450°C, as well as high chemical resistance to acids, alkalis, sol-vents.
| Material name | Minimum operating frequency, GHz |
Maximum amplitude of the reflected signal, dB |
Thickness, mm | Density, g/cm3 |
Notes |
| CCA-8 | 8 | -13 | 8 | 0.9-1.2 | |
| CCA-12 | 12 | -30 | 6 | 0.9-1.2 | is being developed |
| CCA-26 | 26 | -24 | 5 | 0.9-1.2 | |
| CCA-150 | 150 | -21 | 5 | 0.9-1.2 |
A new object of research is porous carbon micro- and nano-structures, foams, meso- and aerogels, hollow spheres. The variety of porous carbon structures (random, ordered, 3d-regular lattice, etc.) provides ample opportunities for the manufacturing of materials and metamaterials with unique electrical and electromagnetic properties.
Application
Radiolocation, radio-electronics, scientific developments
