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5m semi anechoic chamber



The main purpose of a 5m semi anechoic chamber is to perform (pre) compliance measurements of radiated emission or immunity of electronic equipment at 5 and/or 3mtr measurement range length. The combination of the pan-type 2mm galvanized RF shielded panel system and the polystyrene hybrid absorbers on the walls and ceiling eliminates unwanted reflections and complies with international emission test standards.


Features of a 5m semi anechoic chamber:

  • Pre compliance emission (5 mtr) test site for frequency range of 30MHz to 18GHz as per CISPR 16-1-4
  • Full compliance immunity (3 mtr) test site for frequency range of 80MHz to 6GHz as per IEC/EN 61000-4-3
  • Full compliance emission (3 mtr) test site for frequency range of 30MHz to 18GHz as per CISPR 16-1-4
  • Shielding effectiveness according to EN 50147-1 (>80dB at 10kHz)


Applicable standards / test methods for a 5m semi anechoic chamber:

  • CISPR 16-1-4
  • IEC/EN 61000-4-3
  • ANSI C63.4
  • FCC 15 (3 mtr)


Typical performance of a 5m semi anechoic chamber:

  • NSA: +/- 4dB at 5 mtr, +/- 3,5dB at 3 mtr.
  • sVSWR: ≤ 6dB
  • FU: 75% of 16 points ≤ 6dB at 3m test distance & 1,5 x 1,5m test window (0,8m above floor level)


Typical specifications for a 5m semi anechoic chamber:

 
Dimensions
Construction
Absorbers
Ventilation
Entrance door
Wall entry panel
EUT power line
Lighting
Frequency range
Test distance
Test volume*
Floor
Turn table
Antenna mast            
11.40 x 6.60 x 5.775m (l*w*h)
2mm ZMA-140 galvanized shielding panels with a free standing structural steel support
Hybrid solution of ferrite tiles and polystyrene absorber (model HT45) on walls and ceiling
Honeycomb model 1791-3030 (300x300mm / 18GHz)
RF shielded sliding door model 1752-1523 (1500x2300mm) incl. slope / platform
Model 1795-1530 (150x300mm) including RF connectors
Filtered 230VAC / 32A / single phase model 4801-032
CDMT lights 150W model 1830-150
30MHz to 18Ghz for radiated emission and 80MHz-6GHz for radiated immunity
5m and 3m between centre of antenna and EUT
3m
Reflective ground plane with floor entry panels incl. RF connectors
Fiber optic controlled turn table 3m diameter
Fiber optic controlled antenna mast

* other test volume dimensions available upon request.

In addition to the typical specification of the 5mtr semi anechoic chamber Comtest can tailor the chamber specification to satisfy our customers’ individual requirements.


Options for a 5m semi anechoic chamber:

  • An additional RF shielded room can be installed to house high power RF amplifiers (amplifier room) or control and        test equipment (control room).
  • Video and audio monitoring system: color camera unit with remote controller and LCD monitor.
  • RF shielded sliding door model 1754-2424 Sa (2400x2400mm) incl. lift platform for large EUT entrance.