Patents by Inventor Mafeng Zhu

Mafeng Zhu 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).

  • TM mode RF filter having dielectric rod resonators with cylindrical parts of different diameter
    Patent number: 9007150
    Abstract: The invention relates to a dielectric resonator rod in a transverse magnetic mode radio frequency filter comprising a first cylindrical end part (10) of a first diameter (D1) and a second cylindrical end part (20) of a second diameter (D2). The first diameter is different than the second diameter and the first cylindrical end part (10) is connected via a third intermediate part (30) to the second cylindrical end part (20). The third intermediate part (30) comprises a tapered outer circumferential surface connecting the first cylindrical end part (10) to the second cylindrical end part (20).
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: April 14, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Mafeng Zhu, Yan Zhang
  • Dielectric Resonator Rod and Method in a Radio Frequency Filter
    Publication number: 20120092089
    Abstract: The invention relates to a dielectric resonator rod in a transverse magnetic mode radio frequency filter comprising a first cylindrical end part (10) of a first diameter (D1) and a second cylindrical end part (20) of a second diameter (D2). The first diameter is different than the second diameter and the first cylindrical end part (10) is connected via a third intermediate part (30) to the second cylindrical end part (20). The third intermediate part (30) comprises a tapered outer circumferential surface connecting the first cylindrical end part (10) to the second cylindrical end part (20).
    Type: Application
    Filed: June 17, 2009
    Publication date: April 19, 2012
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Mafeng Zhu, Yan Zhang