Patents by Inventor Karthik Narayanan Moncombu Ramakrishnan

Karthik Narayanan Moncombu Ramakrishnan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Virtual short circuit for providing reference signal in RFID tag
    Patent number: 7505001
    Abstract: An RFID tag (10) including a virtual short circuit using a stepped impedance transformation from an open circuit or other known impedance point to provide a reference signal to an integrated circuit (22). The stepped impedance transformer (28) does not consist solely of a quarter wavelength transmission line. The stepped impedance transformer (28) may consist of first and second transmission lines (30,32) having different lengths and widths. The RFID tag (10) may also include an impedance matching circuit (20) which does not consist solely of a three-section transmission line. The matching circuit (20) may include a shorting stub transmission line.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: March 17, 2009
    Assignee: The University of Kansas
    Inventors: Daniel D. Deavours, Karthik Narayanan Moncombu Ramakrishnan