How tall should absorbers be for low frequencies?
This is Rik de Groot, holding a rare 110 CM absorber. In this post…
29/01/2025
Rik explains that traditional absorbers are made of polyurethane with an open-cell structure. “This has a downside as it wears down over time and can leak particles after a few years. On the other hand, closed-cell absorbers cannot be cut into a perfect tip from raw material. This presents a dilemma.”
Over the six years, Rik and his team made significant progress: In 2011, they launched their first wedge-shaped absorbers, which they still sell for the EMC-testing market. In 2017, they started manufacturing these wedge-shaped absorbers from EPS, open-cell Expandable Polystyrene, using a mold instead of cutting the shape. Around 2019, they received an increasing demand from clients in the antenna-testing markets who wanted sturdy EPS-absorbers with a perfect tip for measurements above 40 GHz. These are the ones featured in the photo; it’s a family of four different heights designed especially for the antenna-testing market.
At Comtest Engineering, we are delighted to offer our customers this brand-new series of EPS absorbers. Please feel free to contact our specialists Marc Le Roy, Uliana Trucchi, Hanneke Mertens – van Veen or Mark Miles for more information.
This is Rik de Groot, holding a rare 110 CM absorber. In this post…
Upgrading a chamber with a minimum of downtime. How do we do that? In the middle of the photo is Edwin van der Ploeg, our international Service Engineer and supervisor of the chamber upgrade he is standing in.
COMTEST
Hoge Rijndijk 205 | 2382 AL Zoeterwoude | The Netherlands | +31 71 541 7531 | Send us an email
Privacy Policy © Comtest 2025
COMTEST ENGINEERING BV
Hoge Rijndijk 205 | 2382 AL Zoeterwoude | The Netherlands | +31 71 541 7531 | Send us an email
Privacy Policy © Comtest Engineering 2025
Our services include maintenance and validated testing. We recommend that both are executed by authorized personnel only. Our expert teams can perform preventive maintenance on RF-shielded doors, mode-stirrer systems, and positioning equipment such as turntables. We also offer validation services to see if your EMC test chamber or RF-shielded room still functions within its intended limits and avoiding unexpected down-time or product recalls at the same time.
Our services include maintenance and validated testing. We recommend that both are executed by authorized personnel only. Our expert teams can perform preventive maintenance on RF-shielded doors, mode-stirrer systems, and positioning equipment such as turntables. We also offer validation services to see if your EMC test chamber or RF-shielded room still functions within its intended limits and avoiding unexpected down-time or product recalls at the same time.
A shielded room can perform conducted emission and immunity EMC measurements, eliminating harmful external influences, leading to more accurate and consistent test results. Being a Faraday cage, a shielded room will not only improve test results but will also form an excellent aid in protecting information and essential hardware. Comtest can assist governments, the military, financial institutions, and large corporations in protecting what matters most in critical situations. We offer the highest quality, sensitivity, and security before, during and after working with you.
A shielded room can perform conducted emission and immunity EMC measurements, eliminating harmful external influences, leading to more accurate and consistent test results. Being a Faraday cage, a shielded room will not only improve test results but will also form an excellent aid in protecting information and essential hardware. Comtest can assist governments, the military, financial institutions, and large corporations in protecting what matters most in critical situations. We offer the highest quality, sensitivity, and security before, during and after working with you.
Comtest has been building high-quality antenna test ranges for more than 20 years. We are dedicated to putting our experience to work for you, turning any problem you might have into a customized test solution. As for researching and developing your products, we know speed and return on investment are very important. That’s why we ensure your project is delivered on schedule, on budget and exactly as ordered.
Comtest has been building high-quality antenna test ranges for more than 20 years. We are dedicated to putting our experience to work for you, turning any problem you might have into a customized test solution. As for researching and developing your products, we know speed and return on investment are very important. That’s why we ensure your project is delivered on schedule, on budget and exactly as ordered.
Comtest offers semi and full anechoic chambers that shield almost 100% of ambient emissions and reflect minimal internal radiation. We deliver or build your custom test chamber at your location, depending on what size chamber you need. If you tell us your challenges, we’ll offer a tailored turnkey solution from design to installation, including upgrades and yearly certifications.
We are committed to helping you achieve the best EMC testing possible.
Comtest offers semi and full anechoic chambers that shield almost 100% of ambient emissions and reflect minimal internal radiation. We deliver or build your custom test chamber at your location, depending on what size chamber you need. If you tell us your challenges, we’ll offer a tailored turnkey solution from design to installation, including upgrades and yearly certifications.
We are committed to helping you achieve the best EMC testing possible.