An anechoic chamber is simulating an Open Area Test Site (OATS), without interference from environmental electromagnetic field pollution. Its origins can be traced to efforts to build aircrafts which absorbed or scattered radar signals during the Second World War. Recent innovations such as the use of ferrite tiles, have greatly enhanced the performance of these anechoic chambers.
The anechoic chamber is typically used to house the equipment for performing measurements of antenna radiation patterns, electromagnetic compatibility (EMC) and radar cross section (RCS) measurements. Testing can be conducted on full-scale objects including various electronic devices, vehicles, aircraft or spacecraft. The internal appearance of anechoic chambers is sometimes similar to that of an acoustic anechoic chamber, however, the interior surfaces of the RF anechoic chamber are covered with radiation absorbent material (RAM)* instead of acoustically absorbent material.
*The more common name for RAM is microwave absorbers.
To satisfy each unique customer requirement Comtest Engineering can provide turnkey solutions for the following anechoic test chambers:
• Compact full anechoic chamber
• Semi anechoic chamber, test distance 3m, 5m, 10m.
• Anechoic chamber for automotive testing (components / full vehicle)
• Anechoic chamber for Mil-STD / DO-160 testing
• Antenna pattern measurement room
• (compact) Antenna test range
Applicable standards / test methods for semi / full anechoic chambers:
CISPR 11 / EN55011
CISPR 12 / EN55012
CISPR 13 / EN55013
CISPR 14 / EN55014
CISPR 15 / EN55015
CISPR 22 / EN55022
FCC part 15
Mil-Std 461-F (re section)
Various ETSI standards
Mil-Std 461-F (RS section)