3M EMC chamber is on the basis of electromagnetic shielding room, with the walls and ceilings mounted on the electromagnetic wave absorption material and the ground is the ideal reflection surface so as to simulate the open site test conditions.
2.Shielded chamber shielding performance in accordance with EN50147-1 test, shielding effectiveness at least to meet the following requirements:
Frequency
Shielding effectiveness
10KHz——150KHz
70dB
150KHz ——1MHz
100dB
1MHz——1000MHz
100dB
1GHz——18GHz
100dB
3.Absorbing material reflection loss：30MHz～18GHz≥15dB
4.Normalized field attenuation ensures that the measured value from 30MHz to 1GHz in a static zone with a diameter of 2M does not exceed ± 3.5dB (standard requirement ± 4.0dB).
Chamber structure:
(A) Shielding room: shielding room composed by the shielding shell, shielding doors, ventilation waveguide windows and various types of power filters and other components. (B) Absorbing material: 1, single-layer ferrite tablets: operating frequency range of 30MHz ~ 1000MHz. 2, cone-shaped carbon sponge absorbing material. (C) other: the signal transmission board, turntable, antenna, monitoring system, composite absorbing materials, CCTV systems.
