RF absorber has 25% biomass

TDK has introduced a radio wave absorber material with more than 25% or biomass by weight.

Called the IS-BP series, the foams are intended to line the ceiling, walls and floor of microwave anechoic chambers used to evaluate antennas and wireless communication equipment, as well as millimeter-wave radar for automated driving.

They consist of polyethylene loaded with carbon, and there are two versions: with either 120 or 300mm pyramidal cones to suit different frequency ranges (see table).

“Absorption performance is equivalent to that of conventional products,” said the company. “Extensive testing has shown that the IS-BP series is as strong and durable as traditional products and is equally non-flammable.”

The biomass part is polyethylene derived from sugarcane, according to TDK, and the absorber “was developed in response to the growing demand of supply chain partners to show compliance with climate change initiatives. This product is certified by the JBPA [Japan BioPlastics Association] and has been shown to reduce CO₂ emissions by 13% compared to conventional products.”