Patents Represented by Attorney Keusey, Tutunijian & Bitetto, P.C.

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  • Impedance matching circuit with simultaneous shielding of parasitic effects for transceiver modules
    Patent number: 7412172
    Abstract: An RF device includes a signal layer disposed over a ground plane having radio frequency (RF) transmission lines configured and dimensioned to provide impedance matching along the RF lines. A shield is formed as a part of the RF lines and disposed below the RF choke of a DC current supply to form an intermediate capacitance between the choke and the shield to control parasitic effects.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: August 12, 2008
    Assignee: International Business Machines Corporation
    Inventors: Daniel M. Kuchta, Mark B. Ritter, Albert E. Ruehli, Christian Schuster