Patents by Inventor Yuanfei Cen

Yuanfei Cen 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).

  • Input power limiter for a microwave receiver
    Patent number: 6853264
    Abstract: A power limiter for limiting power of high frequency signals at an input to a receiver comprises a plurality of transmission line sections connected in succession. Each section has a series inductance coupling an input to an output of the section, and a shunt capacitance constituted by capacitance of at least one pair of oppositely-poled Schottky diodes coupled at the output of the section to limit voltage of the signal at the output. Individual diodes can be replaced by series-connected diodes, or by an array of parallel and series-connected diodes, in different sections for improved performance of the limiter. The limiter can be integrated with a GaAs low noise amplifier of the receiver.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: February 8, 2005
    Assignee: Nortel Networks Limited
    Inventors: Jeffrey H. Bennett, Yuanfei Cen
  • Input power limiter for a microwave receiver
    Publication number: 20040174226
    Abstract: A power limiter for limiting power of high frequency signals at an input to a receiver comprises a plurality of transmission line sections connected in succession Each section has a series inductance coupling an input to an output of the section, and a shunt capacitance constituted by capacitance of at least one pair of oppositely-poled Schottky diodes coupled at the output of the section to limit voltage of the signal at the output. Individual diodes can be replaced by series-connected diodes, or by an array of parallel and series-connected diodes, in different sections for improved performance of the limiter. The limiter can be integrated with a GaAs low noise amplifier of the receiver.
    Type: Application
    Filed: March 17, 2004
    Publication date: September 9, 2004
    Inventors: Jeffrey H. Bennett, Yuanfei Cen
  • Input power limiter for a microwave receiver
    Publication number: 20020180552
    Abstract: A power limiter for limiting power of high frequency signals at an input to a receiver comprises a plurality of transmission line sections connected in succession Each section has a series inductance coupling an input to an output of the section, and a shunt capacitance constituted by capacitance of at least one pair of oppositely-poled Schottky diodes coupled at the output of the section to limit voltage of the signal at the output. Individual diodes can be replaced by series-connected diodes, or by an array of parallel and series-connected diodes, in different sections for improved performance of the limiter. The limiter can be integrated with a GaAs low noise amplifier of the receiver.
    Type: Application
    Filed: May 29, 2001
    Publication date: December 5, 2002
    Inventors: Jeffrey H. Bennett, Yuanfei Cen