The site acceptance of anechoic chamber was completed by SEARI on November 08, 2017, in strict accordance with the user's technical requirements and the latest domestic and international standards, and passed the performance acceptance test of anechoic chamber.

Highlights of the project:

The imported Netherlands COMTEST solid absorbers have been committed for more than 30 years. Compared with traditional absorbers, it has great advantages and improvements in waterproof, moisture-proof and no-carbon leakage.

Anechoic chamber meets environmental protection standards; from shielding, ferrites to absorbers all adopt mechanical assembly technology without any glue.

The absorbers adopt the contour high-fully filled design, which meets the military and commercial standard test requirements, and end caps are mounted on the absorbers, which not only enhance the aesthetics but also protect the tips of absorbers.

The imported Netherlands COMTEST 3m*3m automatic sliding gate equipped with a 5 ton vertical lifting automatic ramp, it can ensure that the vehicle can enter the anechoic directly.

The COMTEST shielded gate /door features a unique frictionless parallel closure system. This multiple (> 6) points locking system ensures a longer use and life of the double knife edge, matching quadruple beryllium copper finger contact strip. All fully automatic gates are equipped with a safety system to prevent blockage during opening and closing. The operation of the gate is implemented by a separate control cabinet. The button is used to operate the RF shield sliding gate, once the button is pressed, the gate will move in the certain direction, and when the button is released, the gate will stop immediately.

The anechoic reflecting ground plane is made of galvanized steel and has a bearing capacity of 3 tons per square meter.

The important performance indicator--NSA of the anechoic chamber is +/-3.5dB on the axis of the anechoic chamber.

Main indicators of the anechoic chamber:

Quiet zone dimension: Φ5m, 2.5m height at 10m test distance; Φ2m, height 2m at 3m test distance.

Normalized Site Attenuation (NSA) : according to the latest version of GB 9254, CISPR 16-1-4 (GB/T 6113.104) and ANSI C63.4, in the frequency range of 30MHz~1GHz, for 10m test distance, with quiet zone dimension of Φ5m and 2.5m height and for3m test distance, with quiet zone dimension of Φ2m and 2m height, NSA is ≤ +/- 3.5 dB in axis.

Site Voltage Standing Wave Ratio (SVSWR): according to the latest CISPR 16-1-4 (GB/T 6113.104) and CISPR 16-2-3 (GB/T 6113.203), in the frequency range of 1GHz~18GHz, for 3m/5m test distance, with quiet zone dimension of Φ2m and 2m height, SVSWR is ≤5.5dB.