Convoluted Microwave Absorber

DMC Convoluted absorbers are made of flexible PU foam material block with the front surface cut to convoluted shape, dipped into absorbing slurry to provide desired electrical grading due to rounded convolutions and lacking sharp corners and points. Our CVT series absorbers are preferred for millimeter wave frequencies and for very wide incident angles.

Frequency range 8GHz to 80GHz
Typical reflectivity as high as -30dB
Fire Retardant per NRL-8093 1,2,3, with Zero Halogen
Continuous working temperature up-to 90°C
RoHS Compliant
Zero Carbon dust

Part number reference:
DMC-CVT-50, DMC-CVT-100

Datasheet

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TYPICAL REFLECTIVITY AT NORMAL INCIDENCE OVER FREQUENCY RANGE IN dB

Model Number	2 GHz	8 GHz	10 GHz	30 GHz	50 GHz	80 GHz
DMC-PU-CV-50		20	25	25	35	40
DMC-PU-CV-100	20	25	30	30	35	40

DMC-PU-CV-100

Frequently Asked Question

What is a Convoluted Microwave Absorber?

A convoluted microwave absorber is a flexible RF absorbing foam designed to reduce microwave reflections.

What material is used in the absorber?

The absorber is made from carbon-loaded polyurethane foam designed for RF absorption.

Where are convoluted microwave absorbers used?

They are commonly used in RF test chambers, antenna measurement labs, and EMC testing facilities.

What frequency range does the absorber support?

The DMCRF convoluted microwave absorber typically operates from 8 GHz to 80 GHz.

What reflectivity performance can be expected?

These absorbers can achieve reflectivity levels around –30 dB depending on frequency and thickness.

Are these absorbers fire-retardant?

Yes, the absorber materials are designed to meet fire-retardant safety standards.

Can convoluted absorbers be used in anechoic chambers?

Yes, they are often used in anechoic and semi-anechoic chambers.

Are these absorbers easy to install?

Yes, the lightweight foam panels allow simple installation on walls or test enclosures.

What industries use microwave absorbers?

Industries such as aerospace, defense, telecommunications, and electronics testing use them.

Why choose DMCRF convoluted microwave absorbers?

DMCRF absorbers provide reliable RF absorption, wide frequency coverage, and durable materials.

What Our Clients Say

Wide Frequency Range for Microwave Testing

September 17, 2026

We’re very impressed with the flexibility of this absorber. Its 8 GHz to 80 GHz frequency range makes it suitable for a wide range of microwave and millimeter-wave applications. The broad coverage is especially useful for professional testing environments where different frequency requirements need to be handled. Overall, a practical and versatile solution.

Sophia Bennett

Effective Solution for Reducing Microwave Reflections

September 17, 2026

We’re very pleased with this solution for controlling unwanted microwave reflections. It has helped create a more controlled testing environment and supports consistent performance during our measurements. The overall design feels practical and well suited to professional RF and microwave applications. A reliable addition to our testing setup.