L-C type filter module and helical filter made up of at least two such modules
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United States of America Patent
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Nov 29, 2005
Grant Date -
Jul 24, 2003
app pub date -
Jan 23, 2003
filing date -
Jan 23, 2002
priority date (Note) -
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Abstract
An L-C type filter module comprising at least two capacitors and at least one inductor. Each of the capacitors consists of a first elongated element made of conductive material partially fitted in a hole made in a second element made of conductive material, connected electrically to the second elements of the other capacitor(s) or possibly common to the various capacitors, at least the internal lateral surfaces defining the holes being covered with dielectric material, as are the edges of the openings of the holes or perforations and at least parts, or preferably all, of the external surfaces of the second element(s) adjoining the edges, and the coil of each inductor is carried by a support body made of dielectric material, possibly contiguous with the second element(s) or the dielectric coating at least partially covering the external face of each second element.
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