Filter element
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United States of America Patent
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Dec 12, 2006
Grant Date -
Feb 24, 2005
app pub date -
Aug 20, 2004
filing date -
Aug 21, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filter element includes a coil part formed in an overall tube-like shape by layering a signal transmitting belt-like conductor and a grounding belt-like conductor with a belt-like insulator in between and winding so that the grounding belt-like conductor is outside the signal transmitting belt-like conductor, a magnetic body being attached to a center of the coil part; an input terminal that is connected to an outermost circumferential part of the signal transmitting belt-like conductor and is led from an outer circumferential position of the coil part; an output terminal that is connected to an innermost circumferential part of the signal transmitting belt-like conductor and is led from a central position of the coil part located on an opposite side to a leading position of the input terminal with the magnetic body in between; and a grounding terminal that is connected to an outermost circumferential part of the grounding belt-like conductor and is led from an outer circumferential position of the coil part located on an opposite side to a leading position of the input terminal with a leading position of the output terminal in between. In this way, a filter element with superior attenuation characteristics is realized.
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