Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2005-09-06
2005-09-06
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
C336S192000
Reexamination Certificate
active
06940366
ABSTRACT:
The present invention provides a coil filter suitable for surface mounting on an electronic circuit board by automatic mounting and capable of realizing wide band isolation excellent in high-frequency characteristics without requiring consideration for the mutual position of parts. The coil filter functions to block electromagnetic waves or high-frequency signals propagating while being superimposed on a DC power supply, signal, or the like of an electronic apparatus such as an electronic circuit board. Conducting wires are bonded electrically at coil end parts such that a conducting wire part wound by one turn or more constitutes a short ring conducting in a ring shape on both sides of an intermediate part in which electrically insulated conducting wires are wound. End parts of the conducting wire are positioned on the inner side of the outermost circumferential part of the coil-shaped end faces.
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Ham Seungsook
Lowe Hauptman & Berner LLP
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