Chambers Overview

Not all chambers offer the same performance or quality. All reverberation, fully and semi-anechoic chambers provided by AR RF/Microwave Instrumentation through Comtest Engineering BV offer customers the highest level of performance, quality and support. There are several outstanding advantages of Comtest chambers. One unique advantage is the Pan Shield design. The approach used by Comtest allows for premium performance and seamless construction over older designs techniques, such as wood core shielded chambers. The baseline performance of the pan-type shield is far more reliable, and exceeds 100 dB level of attenuation up to 40 GHz without any modifications or add-ons. This provides a great testing environment for your testing needs

Another important component of the performance of an anechoic chamber is the RF absorber. Comtest’s closed cell, non-hygroscopic, carbon-loaded polystyrene absorbers are specifically designed to inhibit the reflection of electromagnetic radiation, which makes them suitable for use in EMC test laboratories as well as antenna chamber applications. Naturally, the absorption characteristics can be altered by using different thicknesses and arrangements. Comtest’s absorber products are divided into two main categories: Hybrid & Microwave. Hybrid chamber solutions make use of ferrite tiles in combination with the HT series absorbers, and the microwave absorber line is typically used for research related to antenna pattern measurement.


Although AR offers predefined chamber designs, chambers are fully customizable and offer a complete selection of accessories. Turntables, masts, and a wide array of antennas are part of the basic offering, whilst other components such as fiberoptic converters, shielded RF penetrations, specialty bulkhead connectors, CCTV, and projection systems are also available.


With the addition of chambers, customers can rely on AR RF/Microwave Instrumentation to provide a total EMC solution; chambers, instrumentation (including systems), as well as the highest level of service and technical support.

AR Resource:
Ensuring Test Site Compliance for Radiated Emissions With Normalized Site Attenuation

HT – Hybrid absorber installation assembly rendering

Video 1: Comtest employs several layers to deliver high performance from their anechoic chambers.

  • Layer 1: Pan type shield panel – Constructed with 2mm pan-type galvanized panels and assembled with special fastener M10 and high-performance gasket to ensure a long-life RF shielding attenuation
  • Layer 2: Wood furring strips used to attach MDF board
  • Layer 3: MDF board – Provides a surface for the tile to be glued and fastened down as needed
  • Layer 4: Ferrite tile – A type of absorber material that is used at lower frequencies for the absorption of RF
  • Layer 5: Furring strips, similar to the second layer. These are used to allow fastening of the plastic profiles that hold the absorber base panel in place
  • Layer 6: Absorber base panel – A slotted base that accepts the tabs in the underside of the absorber cones and holds them in place
  • Layer 7: Plastic profiles that hold the absorber base panels in place
  • Layer 8: Absorber cones used for RF absorption

MT – Microwave absorber installation assembly rendering

Video 2: This video shows the layers that make up a non-hybrid absorber installation.

  • Layer 1: Pan type shield panel.
  • Layer 2: Furring strips
  • Layer 3: Absorber Base Panel
  • Layer 4: Plastic profiles that hold absorber base panel in place
  • Layer 5: Absorber cones

Demo Corner – Pan shield corner installation assembly rendering

Video 3: This video shows the assembly that makes up a corner on a Comtest pan type shield.

It depicts two adjacent wall panels and a floor panel being bolted together, compressing a gasket and providing shielding effectiveness. It also provides an example of how connector panels are integrated onto the shield.