Microwave anechoic chamber is mainly used to simulate free space environment for EMI testing.
Technical parameters & requirements:
Function: provide guarantee conditions for EMI pre-test.
Quit zone of EMI pre-test: Diameter,0.5m; Height, 0.5m (0.8~ 1.3m’s distance far from the floor)
Working frequency range: Radiated emission pre-test 500MHz~18GHz
Normalized Site Attenuation NSA: In the range of 500MHz~1GHz,it can meet the requirements of EN50147-2-1996 and ANSIC63.4 1992,and NSA≤±4dB. While, in the range of 1~18GHz,it can meet the requirements of CISPR16-1-4,SVSWR is better than 6dB.
Field Uniformity(FU): 500MHz~18GHz, it can meet the requirements of IEC61000-4-3-1995 and EN61000-4-3-1996, i.e., on the 0.5mX0.5m supposed vertical plane surface 0.8m above ground in the EUT zone, with 3 meters test distance, it requires that 75% of the uniformly divided 16 points’ field intensity tolerance should be within 0~+6dB.
In the semi/full microwave anechoic chamber, without EUT, and while turning on positioner, antenna tower, CCTV sensor and lamps, the test level of the space background noise should be at least 10dB lower than the limit level Class B stipulated in standard EN55022, GB9254-1998 under frequency of 500MHz~1GHz.
Shielding Effectiveness of Shielding Body:
Magnetic field 14KHz≥70dB
100KHz≥100dB
1MHz≥100dB
Plane wave 10MHz≥100dB
10MHz-1GHz≥100dB
Microwave 1-10GHz≥100dB
Configuration of 3m EMI chamber:
1,Shielding body’s size: 5m×4m×2.5m
2,Electric locked shielding door (Opening size): 1. 5m×2.1m One set
3,Power filter: FNF102C50(Single cable) Four pcs
A group of three-phase AC power (380V, 50A, 50Hz), used for the tested devices
4,Logical filter(FNF102C50) One pcs
5,Entry panel Two sets, Configured with SMA type 2pcs, optical waveguides 2pcs and optical waveguide connectors
2pcs
6,Ventilation Honeycombs 300mm×300mm Four sets
7,Video and monitoring system One set
Optical video(with RS-232 data transfer function) One couple
Optical waveguides One pcs
8,Optical switch One couple
9,EMC test bench(Optional) One pcs
10,Indoor electrical Cubicle switchboard (contains all air switches) One set
Cold light spotlight Two pcs
Mobile lighting One pcs
Wall switch One pcs
Power socket Two groups
Electrical lines One group
11,Absorbing materials
Stick up absorbing materials on four walls and ceiling, set up mobile absorbing materials between the antenna and tested objects.
Diameter 0.6m positioner(Optional) One set
Positioner’s double-controller(Optional) One set
1~1.5m lifting antenna tower(Optional) One set
Controller of antenna tower(Optional) One set
Absorbing materials(300 mm high-angle cone) 80m2
