EMC & Microwave Absorbers
What is an electromagnetic absorber?
Absorbers are necessary in order to reduce or eliminate the reflection of electromagnetic waves. They can be placed within an enclosure that is impermeable to waves or used as standalone solutions.
When integrated in shielded rooms, they form an anechoic chamber which makes it possible to provide:
- Precise, repeatable test conditions for EMC (Electromagnetic Compatibility) and antenna measurements (RF/hyperfrequency).
- An environment similar to that of free-space.
The dimensioning of the shielded structure and the arrangement of the selected absorbers guarantee the performance in the defined test area within a frequency range going from a few MHz to several tens of GHz.
The height of the absorbers (which is a function of the wavelength) depends on the required low frequency together with the desired level of reflectivity. The waves are gradually absorbed or reflected as they penetrate.