Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2006-02-07
2006-02-07
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
C333S185000
Reexamination Certificate
active
06995632
ABSTRACT:
Disclosed is a high-frequency band pass filter of simple structure for use in a frequency range from hundreds of MHz to over ten GHz. The band pass filter comprises a magnetic loss sheet1prepared by dispersing fine powder of averaged particle size up to 30 μm of a soft magnetic metal such as an Fe—Cr—Al alloy, an input signal line2and an output signal line3made of a conductive strip disposed in serial direction with a gap between them, a capacitance means connecting the opposite ends of the lines and a GND line4disposed on the reverse side of the sheet. The capacitance means may be either a chip condenser5, or that formed by disposing an internal line7of another conductive strip with intermediation of insulating film6to bridge on the input signal line2and the output signal line3to have overlapping parts.
REFERENCES:
patent: 4800343 (1989-01-01), Kinoshita
patent: 4881050 (1989-11-01), Swanson, Jr.
patent: 6211754 (2001-04-01), Nishida et al.
patent: 6650203 (2003-11-01), Gerstenberg et al.
Harada Hiroshi
Saito Akihiko
Daido Steel Co. Ltd.
Ham Seungsook
National Institute of Information Communications and Technology
Westerman Hattori Daniels & Adrian LLP
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