Patents by Inventor Mei Foo

Mei Foo 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).

  • Surface acoustic wave duplexer having enhanced isolation performance
    Publication number: 20050206477
    Abstract: A miniaturized SAW duplexer includes SAW filters carried on a monolithic piezoelectric chip that is mounted inside a multi-layered ceramic package. A phase matching stripline is embedded diagonally and between two ground layers of the multi-layered ceramic package and is positioned between a wall of vias for significantly minimizing coupling between transmitted and received filters by providing an improved ground shielding of the phase matching stripline. Coupling within the same filter and coupling between the SAW filters are suppressed and thus provide enhanced isolation performance. for the SAW duplexer.
    Type: Application
    Filed: January 28, 2005
    Publication date: September 22, 2005
    Applicant: Sawtek, Inc.
    Inventors: Kamran Cheema, Mei Foo, Aytac Aydin