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New advancements in absorber technology means good news for microwave frequency testing



Comtest Engineering have recently developed a polystyrene absorber which matches the performance of traditional polyurethane foam absorbers in microwave frequencies.

This latest advancement is good news for both those who are looking to purchase their own EMC chamber or upgrade their existing facility and those who are using an accredited lab for their EMC testing, as polystyrene has many advantages over the polyurethane foam traditionally used in absorbing cones.

Improved performance in microwave frequencies

So how has this improvement in the microwave frequency range come about? The answer lies in the javelin-tipped shape of the absorber which enables it to operate in frequencies from 500 MHz all the way up to 40Ghz.

Introducing the MT45-JT

Comtest’s new MT45-JT is ideal for use in full anechoic chambers and antenna test ranges. It matches the performance of traditional polyurethane foam absorbers, yet also retains all the characteristics which make polystyrene both eco-friendly and highly durable.

Features and benefits:

Enhanced product design

  • Enhancements in product design include:
  • Alternating tapers (vertical / horizontal)
  • Light weight (40% lighter than foam)
  • Removable tapers

Rigidity and superior tensile strength
The MT45-JT ‘s rigidity and superior tensile strength means no drooping tips.

Resilience to humidity (non-hygroscopic)
The MT45-JT is highly resilient to humidity and changes in ambient temperature.

Certified for use in clean rooms (class 10.000 / ISO14644-1 class 4)
Polystyrene absorbers are closed cell products which don’t leach particles and black dust. They are therefore an extremely durable (and virtually maintenance free) product

Compliant with fire retardant standards ISO 11925-2 class E
The MT45-JT is compliant with all necessary fire retardant standards without using hazardous materials.

Superior product life
The MT45-JT comes with a 25 year warranty and is expected to last well beyond that (upwards of 40 years)

Is your chamber in need of an upgrade?

Many chambers built in the 80s and 90s are equipped with polyurethane absorber materials. As these foam absorbers have a limited product life, your anechoic chamber might need an upgrade to become compliant (again).

If you think you might need to upgrade or if you’re interested in a full anechoic chamber or antenna test range featuring the latest polystyrene absorbers, then please get in touch. MCS Test are the approved UK distributor for Comtest Engineering and we will be happy to advise you on their range of high performance RF shielded rooms, reverberation chambers and semi or full anechoic chambers.