Electromagnetic absorber material, method for the production thereof and method for the production of shielding devices thereof
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United States of America Patent
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Mar 23, 2004
Grant Date -
Jun 12, 2003
app pub date -
Aug 13, 2002
filing date -
Aug 10, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for effectively decreasing electromagnetic radiation by means of active absorbing material in a broad frequency band, preferably from 100 MHz-10 GHz, is provided wherein the material combines the desired shielding properties with the heat insulating properties of a porous material in addition to providing a favourable ratio between density and resistance. The method includes use of an absorber granulate which consists of a highly porous glass and/or ceramic granulate which is coated or filled with ferrite and/or an electrically conductive material.
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