Patents by Inventor Ilkka Kelander

Ilkka Kelander 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).

  • Multilayered filter
    Publication number: 20040012467
    Abstract: The present invention concerns a multilayered filter having a body consisting of multiple lateral layers, and comprising filter elements of transmission line configuration arranged according to a predetermined topology. According to the invention the filter elements further comprise multiple resonators arranged in two or more lateral layers, at least two resonators per lateral layer. Further according to the invention the filter comprises one or more intermediate partial ground planes, each arranged laterally between two layers.
    Type: Application
    Filed: July 1, 2003
    Publication date: January 22, 2004
    Applicant: Nokia Corporation
    Inventors: Olli Salmela, Ilkka Kelander