Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2008-04-08
2008-04-08
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
C333S185000
Reexamination Certificate
active
11554737
ABSTRACT:
A filter element includes a coil part formed in an overall tubular shape by layering a pair of signal transmitting belt-shaped conductors and a grounding belt-shaped conductor with a belt-shaped insulator in between and winding so that the grounding belt-shaped conductor is outside a pair of signal transmitting belt-shaped conductors, a magnetic body attached to a center of the coil part; a pair of input terminals that are connected to respective outermost circumferential parts of the pair of signal transmitting belt-shaped conductors and are respectively led from outer circumferential positions of the coil part; a pair of output terminals that are connected to respective innermost circumferential parts of the pair of signal transmitting belt-shaped conductors and are respectively led from central positions of the coil part located on an opposite side to leading positions of the pair of input terminals with the magnetic body in between; and a grounding terminal that is connected to an outermost circumferential part of the grounding belt-shaped conductor and is led from an outer circumferential position of the coil part located on an opposite side to the leading positions of the pair of input terminals with leading positions of the pair of output terminals in between.
REFERENCES:
patent: 4945322 (1990-07-01), Okumura
patent: 4983934 (1991-01-01), Okumura
patent: 5030933 (1991-07-01), Ikeda
patent: 5040094 (1991-08-01), Okumura
patent: 5153812 (1992-10-01), Naito
patent: 63-174416 (1988-07-01), None
patent: 02-026114 (1990-01-01), None
patent: 02-026115 (1990-01-01), None
patent: 08065081 (1996-03-01), None
patent: 2 826320 (1998-09-01), None
English language Abstract of JP 63-174416.
English language Abstract of JP 02-026114.
English language Abstract of JP 02-026115.
Yanagisawa Koichi
Zhang Fuchun
Ham Seungsook
Hioki Denki Kabushiki Kaisha
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