Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2009-01-12
2010-06-29
Pascal, Robert (Department: 2817)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
C333S134000, C333S175000
Reexamination Certificate
active
07746197
ABSTRACT:
A noise filter array includes filter elements, each of which includes an LC parallel resonant circuit having a coil and a capacitor and an LC series resonant circuit having a coil and a capacitor, are arranged substantially parallel to one another in an array and integrally provided. Grounding capacitors that define the filter elements are arranged so that a common ground-side electrode faces signal-side electrodes and is connected to an inductance adjusting conductor that defines the LC series resonant circuits along with the capacitors through a via hole. The lengths of the inductance adjusting conductor from a connection location within the via hole to ground terminals are substantially equal in each of the filter elements.
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Official Communication issued in International Patent Application No. PCT/JP2007/063994, mailed on Oct. 30, 2007.
Sasaki et al.: “Noise Filter Array,” U.S. Appl. No. 12/358,318, filed Jan. 23, 2009.
Official Communication issued in corresponding European Patent Application No. 07790774.9, mailed on Sep. 24, 2009.
Hadano Kenjiro
Sasaki Tomohiro
Ueno Haruhiko
Glenn Kimberly E
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Pascal Robert
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