- Joined Jan 26, 2018
hello, Actually I looking for Polyurethane made RF Absorber. Do you have any Idea how to impregnate carbon into Polyurethane foam.
thanks andrew let me try with carbon black and epoxy I will let you know the resultsthey are a lot more difficult than you might think.
first the easy part, getting the carbon into a matrix approximating a foam,
second comes the fun part,
if the matching between the ambient and the foam has a high VSWR, then you are just going to get a reflection.
The need is to provide a graduated match,
either by machining the shape or by selective material deposition,
As for how a DIY solution, seems to be a few on the web, but not done it personally,
Thoughts off top of head,
graphite / charcoal mixture in an epoxy, how about layers getting lighter as the layers get near the surface ?
I also wonder, what does carbon fibre sheet look like at RF ?
you can get that in different "densities"
Let us know how your experiments get on.
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