Echo-free shielded chambers such chambers are designed to measure antenna characteristics and research work related to the propagation of radio waves in space.
The Echo-free shielded chambers imitates open space area, where there is no radio waves reflection, whether from walls, ceiling or floor.
Operating frequency range of anechoic chambers: from 10 kHz to 18 GHz or 40 GHz.
Echo-free chambers are radio-frequency and acoustic. In radio-frequency cameras there is no reflection of radio waves from walls/ In acoustic cameras there is no sound reflection from walls.
All supplied cameras are certified with the issuance of appropriate documents.
2. muffled - AMEFSC
Frequency, Hz: From 40 to 250
Sound absorption coefficient: 0.721 to 0.999
AREFSC - provides sound insulation from extraneous noises and is intended for creation inside this chamber of diffusion acoustic fields (sound field, the intensity of which when sound waves fall on the flat surface is evenly distributed along all solid angles from the hemisphere resting on the surface).
AMEFSC - provides sound insulation from extraneous noises and is designed to create conditions for simulating the acoustic field in a free (actually unlimited) space, which is achieved by the vanishingly small influence of any reflections from the borders and other objects of the chamber internal volume in the range of operating frequencies.
Values of electromagnetic wave attenuation correspond to reference values of + - 4 dB.
Echo-free shielded camera are divided into several categories:
- shielded chamber - SC;
- semi-e cho-free shielded chamber - SEFSC
- an echo-free shielded chamber EFSC
- alternative measuring platforms - AMP.
Radio absorbing material in such chambers withstands the levels of electric field strength up to 200 V/m and higher. The walls and ceiling of the chambers are completely covered with adio absorbing material and ferrite plates, which significantly reduces the reflection from internal surfaces.
If necessary, it can accommodate an antenna mast up to 4 m high (depending on the size of the structure).