Patents by Inventor Fei-Ran Yang

Fei-Ran Yang 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).

  • Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators
    Publication number: 20070218851
    Abstract: Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.
    Type: Application
    Filed: May 16, 2007
    Publication date: September 20, 2007
    Inventors: Zaw Soe, Tony Yang, Jackie Cheng, Sining Zhou, Kuangyu Li, Fei-Ran Yang, Shoufang Chen, Tom Baker
  • Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators
    Patent number: 7266352
    Abstract: Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: September 4, 2007
    Assignee: Wionics Research
    Inventors: Zaw Min Soe, Tony Yang, Jackie Cheng, Sining Zhou, Kuangyu Li, Fei-Ran Yang, Shoufang Chen, Tom Baker
  • Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators
    Publication number: 20050266806
    Abstract: Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillator used by the local oscillator circuits, thus allowing the use of small divisor numbers in the local oscillator circuits and reducing phase noise. Independent high-side and low-side RF local oscillators may be provided and selectively used depending on the RF channel to be transmitted or received.
    Type: Application
    Filed: May 28, 2004
    Publication date: December 1, 2005
    Inventors: Zaw Min Soe, Tony Yang, Jackie Cheng, Sining Zhou, Kuangyu Li, Fei-Ran Yang, Shoufang Chen, Tom Baker
  • Low-profile cavity-backed slot antenna using a uniplanar compact photonic band-gap substrate
    Patent number: 6518930
    Abstract: A low-profile cavity-backed slot antenna is disclosed including a cavity substrate having a slot with a resonant frequency and a uniplanar compact photonic band-gap (UC-PBG) substrate, proximate to the cavity substrate and having a two-dimensional periodic metallic pattern on a dielectric slab and a ground plane, wherein the UC-PBG substrate behaves substantially as an open boundary at the resonant frequency of the slot. The slot antenna has reduced height while maintaining good performance.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: February 11, 2003
    Assignee: The Regents of the University of California
    Inventors: Tatsuo Itoh, Yongxi Qian, Fei-Ran Yang
  • Low-profile cavity-backed slot antenna using a uniplanar compact photonic band-gap substrate
    Publication number: 20010050641
    Abstract: A low-profile cavity-backed slot antenna is disclosed including a cavity substrate having a slot with a resonant frequency and a unilanar compact photonic band-gap (UC-PBG) substrate proximate to the cavity substrate and having a two-dimensional periodic metallic pattern on a dielectric slab and a ground plane, wherein the UC-PBG substrate behaves substantially as an open boundary at the resonant frequency of the slot. The slot antenna has reduced height while maintaining good performance.
    Type: Application
    Filed: June 1, 2001
    Publication date: December 13, 2001
    Applicant: The Regents of the University of California
    Inventors: Tatsuo Itoh, Yongxi Qian, Fei-Ran Yang