Hermatically-sealed electrically-absorptive low-pass radio frequency filters and electro-magnetically lossy ceramic materials for said filters
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United States of America Patent
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Apr 29, 2003
Grant Date -
May 9, 2002
app pub date -
Nov 24, 1997
filing date -
Feb 7, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electromagnetically lossy liquid- or gas-tight fusion seal for use as a low pass radio frequency signal filter constructed as a matrix of glass binder and ferrimagnetic and/or ferroelectric filler. Metal cased electrical filters are made by reflowing the material to form fused glass-to-metal seals and incorporating electrical thru-conductors therein which may be formed as inductive windings.
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