foam layer characteristics reg

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Diana S

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can anyone please tell me the dielectric constant and loss tangent value of foam layer
 

Diana S said:
can anyone please tell me the dielectric constant and loss tangent value of foam layer
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Nobody can. There are many foam materials with many features
Foam is used for the advantage that bubbles are filling the volume, with a minimum amount of material that can have a high permittivity and high loss.
To answer your question you must measure a particular material.
 
untreated foams are mostly air, so the dielectric constant is near 1. However, if they are loaded with something, like carbon, etc, all bets are off.
 
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