Anechoic Chambers

Anechoic ChambersAnechoic means "neither having nor producing echoes." In applications discussed here, the echoes typically refer to RF and/or microwave reflections. An anechoic chamber is usually a modular shielded room (or occasionally a welded room) that is lined inside with RF and/or microwave absorbing ("anechoic") material. It is essentially a "stealth room" that is invisible to the products or tests being conducted inside. Depending on the purpose of the room, anechoic material may be placed on the walls and ceiling (usually referred to as "semi-anechoic") or it can be placed on all six sides of the room (aka "fully anechoic"). |

Construction

Supporting Structure

An anechoic chamber is normally a modular shielded room with additional structural steel to provide the necessary support for the additional weight of the anechoic material. See the web page on shielded rooms for more information about the construction of the shielded room and the options that are available.

RF/Microwave Absorber

The RF and microwave absorbing material is chosen based on the customer requirements. We offer a wide selection of polyurethane, polystyrene, polyethylene and ferrite absorbers as well as various combinations to suit each unique performance and environmental specification. Please see our web page on absorber for more information about our selections.

Electromagnetic Compatibility (EMC)

Anechoic Chambers

EMC chambers are designed to create a controlled environment in accordance with published specifications. An untreated modular shielded room is a resonant cavity with field variations up to 30dB. By incorporating anechoic material in specific designs and configurations, the same room can be controlled to within 3-8dB across a frequency range of 26MHz up to 1GHz, 18GHz or 40GHz (depending on the requirement) - a dramatic improvement on the reliability and consistency of test data acquired. Below is a list of common EMC Anechoic Chambers.

Compact Anechoic...