Absorber material even specified up to 240GHz

The Terahertz Sensing group of TU Delft conducts research into applied electromagnetics, antennas, optics and sensors for space travel. To prevent unwanted reflections of these high-frequency signals, absorption materials are applied.

Where other absorber material is specified up to 60 GHz, ABS material has been verified and measured up to 220 GHz. This concerns two series of broadband absorbers:

• ABS-SLF is a multi-layer flat, lightweight carbon loaded foam board. Each layer has a specifically tuned dielectric gradient, for optimum impedance matching with air.
  
  
• ABS-LCF is a range of lightweight, open-cell foam absorbers. The material consists of a single layer of polyurethane foam coated with a dielectric carbon solution with fire-retardant properties.

Thanks to its open-cell structure and a specific production process, the material can be applied to curved or round surfaces. 

During the meeting it was noticed that the material performs within tolerances over the entire frequency range, but shows linear and therefore predictable attenuation. 

The material in question is extremely suitable for use in the micro and millimeter range for attenuation and absorption of unwanted signals in applications such as radar systems, measuring setups and specific research applications 

The material is easy to process and can be provided with an adhesive layer or an aluminium mounting layer.