Product Insights: Top Tips for Selecting Absorbing Materials

Your choice of absorber material may require special formulations and physical geometries to meet your unique requirements. Here are some of the top tips from the experts at ETS Lindgren to aid in your selection process:

1. Start with performance. All other considerations pale in comparison to the importance of performance. For hybrid absorbers, it is important that the dielectric absorbers (pyramids and wedges) are impedance matched to the ferrite tiles.
2. Make sure your absorber selection is appropriate for your application, checking for wideband performances.
3. The control and predictability of measurements should be a key concern when evaluating the overall performance of the absorber under consideration. For example, for polystyrene-based absorbers, the beads are individually coated before molding. The loaded beads are randomly distributed. This results in a uniform distribution of loadings throughout the absorbers. It helps guaranteeing the chamber performance is predictable, which can meet stringent RF requirements.
4. Take advantage of the superior physical/mechanical/humidity resistance properties of polystyrene-based materials, which also offer the high RF performance of traditional polyurethane absorbers. <
5. Consider your total cost of ownership (TCO). Don’t let the lowest initial price drive your decision. Are they durable, and will hold up to the rigors of testing over the years? 
6. Installation can add significant costs to your project, so look for absorber that is rigid and stable in dimension, typically made through a molding process, which are easier to install, and uniform looking. 
7. Are the materials water resistant, to continue working in humid environments? A closed cell structure composition provides a water resistant environment.
8. Are the materials fire retardant? Protect your testing environment with materials that meet stringent fire retardant requirements.
9. Be confident that you adhere with growing environmental concerns and prioritize your selection for materials that are environmentally safe
10.   And finally, insist that your absorber has a quality assurance manufacturing process that checks and audits each and every piece of absorber (as opposed to “batch” monitoring) before it is installed into your test environment.
This month’s Selection Tips are provided by
This is a sponsored post published in the October 2021 issue of The Product Insights newsletter. If you would like to receive tips like this and more, directly to your inbox each month, please subscribe.

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