Amitronic distributes high-quality Comtest EMC chambers. Comtest designs and manufactures EMC test chambers and RF-shielded enclosures for multiple different test standards. Their solutions cover fully compliant test chambers for certification purposes as well as pre-compliance environments suitable for product development.
Comtest facilities are designed to precisely meet the requirements of various industries.
Key Features of Comtest EMC Test Chambers
Comtest is particularly known for its high quality and innovative materials. The core features of their systems include:
- DMAS absorber materials: Comtest uses its own proprietary polystyrene-based DMAS absorbers. Unlike conventional polyurethane-based absorbers, DMAS materials are completely dust-free, adhesive-free, and do not degrade over time. They offer excellent performance at high frequencies.
- Modular RF shielding: The rooms are constructed from shielded panels that provide extremely high attenuation against external interference.
- Turnkey customized solutions: Comtest designs, installs, and certifies chambers tailored to the customer’s facilities. They supply everything required, including turntables, antenna masts, filters, and interference-free LED lighting.
Different Types of EMC Chambers
Various types of chambers are used in EMC testing depending on whether emissions or immunity are being tested. The most common types are:
- Semi-Anechoic Chamber (SAC)
- Structure: Walls and ceiling are covered with RF absorbers, while the floor is a bare, reflective metal surface.
- Applications: Standard testing in industrial, automotive, and defense sectors.
- Function: Simulates an open area test site without external radio-frequency interference. Typical sizes are defined by the measurement distance.
- Fully Anechoic Chamber (FAC / FAR)
- Structure: All surfaces, including the floor, are fully lined with absorbers.
- Applications: EMC testing of smaller devices, radio equipment directive (RED) compliance testing, 5G/mmWave, and antenna measurements.
- Function: Simulates free-space conditions without floor reflections. Measurements typically do not require a height-adjustable antenna mast, which speeds up testing and reduces chamber height requirements.
- Reverberation Chamber (RVC)
- Structure: Fully metallic, reflective walls without absorbers. The chamber contains mechanical stirrers that rotate to change the field distribution.
- Applications: Testing extremely high immunity levels, for example in aerospace and military applications.
- Function: Since energy reflects from the walls instead of being absorbed, a very strong and statistically uniform electromagnetic field can be generated with relatively low input power.
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