After six years the closed-cell absorber with the perfect tip

Rik de Groot, the Managing Director of Dutch Microwave Absorber Solutions, and his team spent six years developing a closed-cell absorber with the perfect tip. But why is it so difficult to achieve this?

Rik explains that traditional absorbers are made of polyurethane with an open-cell structure. “This has a downside as it wears down over time and can leak particles after a few years. On the other hand, closed-cell absorbers cannot be cut into a perfect tip from raw material. This presents a dilemma.”

Over the six years, Rik and his team made significant progress: In 2011, they launched their first wedge-shaped absorbers, which they still sell for the EMC-testing market. In 2017, they started manufacturing these wedge-shaped absorbers from EPS, open-cell Expandable Polystyrene, using a mold instead of cutting the shape. Around 2019, they received an increasing demand from clients in the antenna-testing markets who wanted sturdy EPS-absorbers with a perfect tip for measurements above 40 GHz. These are the ones featured in the photo; it’s a family of four different heights designed especially for the antenna-testing market.

At Comtest Engineering, we are delighted to offer our customers this brand-new series of EPS absorbers. Please feel free to contact our specialists Marc Le RoyUliana TrucchiHanneke Mertens – van Veen or Mark Miles for more information.

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