Patents by Inventor Kok Meng Lim

Kok Meng Lim 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-mode filter for radio frequency integrated circuits
    Patent number: 9373876
    Abstract: A fully integrated silicon-based bandpass filter which lends itself to applications in the gigahertz region is disclosed. The bandpass filter is fabricated on an integrated circuit and operates as a microwave/millimeter-wave filtering circuit. In accordance with one aspect, the bandpass filter includes a first set and a second set of filter coupled elements, a three-port “T” transmission line junction and a perturbing element. The three-port “T” transmission line junction has a first port coupled to a first end of a first one of the first set of filter coupled elements and a second port coupled to a first end of a first one of the second set of filter coupled elements. The perturbing element is coupled to a third port of the three-port “T” transmission line junction. A second one of the first set of filter coupled elements includes an input transmission line and has a first end thereof coupled to an input port and an opposite end thereof having an open end.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: June 21, 2016
    Assignee: Nanyang Technological University
    Inventors: Kai Xue Ma, Kok Meng Lim, Kiat Seng Yeo, Jian-guo Ma
  • Multiple-Mode Filter for Radio Frequency Integrated Circuits
    Publication number: 20140035703
    Abstract: A fully integrated silicon-based bandpass filter which lends itself to applications in the gigahertz region is disclosed. The bandpass filter is fabricated on an integrated circuit and operates as a microwave/millimeter-wave filtering circuit. In accordance with one aspect, the bandpass filter includes a first set and a second set of filter coupled elements, a three-port “T” transmission line junction and a perturbing element. The three-port “T” transmission line junction has a first port coupled to a first end of a first one of the first set of filter coupled elements and a second port coupled to a first end of a first one of the second set of filter coupled elements. The perturbing element is coupled to a third port of the three-port “T” transmission line junction. A second one of the first set of filter coupled elements includes an input transmission line and has a first end thereof coupled to an input port and an opposite end thereof having an open end.
    Type: Application
    Filed: October 27, 2011
    Publication date: February 6, 2014
    Applicant: NANYANG TECHNOLOGICAL UNIVERSITY
    Inventors: Kai Xue Ma, Kok Meng Lim, Kiat Seng Yeo, Jian-guo Ma