Patents Assigned to LK Products
  • Helical resonator filter with adjustable couplings
    Patent number: 5157363
    Abstract: A high-frequency filter employing helix resonators and a metallic or metallized cover. The cover contains at least two helix-shaped resonator coils separated from each other by a metallic or metallized partition provided with an aperture which there is a tuning strip, by reducing the size of which the size of the aperture can be enlarged and thereby the electrical coupling between the resonators adjusted.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: October 20, 1992
    Assignee: LK Products
    Inventors: Pertti Puurunen, Kai Lehmus