Dirt on your test chamber doors can cause serious performance issues, leading to unnecessary costs, downtime, or even non-compliance. For tempest-shielded facilities, it could even lead to a security breach. Our colleague Joëlle Driessen-Verkuijlen, who oversees our maintenance contracts, explains these risks and has a simple solution.
Why is Comtest Engineering founder Hein de Groot holding a table tennis bat in this 1988 photo? This year, we are celebrating our 40th anniversary, and every five weeks, we share a bit of Comtest’s history.
COMTESTÂ
Hoge Rijndijk 205 | 2382 AL Zoeterwoude | The Netherlands | +31 71 541 7531 | Send us an email
Privacy Policy © Comtest 2025
COMTEST ENGINEERING BVÂ
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.Â
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.Â
This is Rik de Groot, holding a rare 110 CM absorber. In this post, he explains the correlation between testing frequencies and absorber height. And how tall are the longest absorbers on the market?
Rik de Groot, Managing Director of our sister company, Dutch Microwave Absorber Solutions (DMAS): “The taller the absorber, the lower the frequency you can test with it. We speak of an absorber when the reflectivity is at least -30dB, the so-called start frequency. The tallest absorber we sell is 65CM/ 26”, used for tests starting around 300 MHz, but the one in the photo is 110CM.
We do not sell these anymore since the geometry of the absorber tip has changed (javelin), but for the right application, we’re open to developing a 110cm javelin tip absorber. For example, the tallest absorbers in the market are mainly used to measure AM or FM frequencies to test onboard radio antennas on vehicles.
The downside of large absorbers is that the chamber needs to be bigger, and many clients have limited heights in their buildings. Instead, we focused on developing new, smaller size absorbers such as 65, 45, 30 and 13CM absorbers for testing between frequencies of 450MHz up to 110GHz.”