Patents Assigned to TEMEX
  • Patent number: 7250832
    Abstract: The invention relates to a method for realizing surface acoustic wave filter arrangements of the kind comprising a piezo-electric substrate and on said substrate metallic strip elements constituting impedance filter elements arranged in a network scheme. In such an arrangement by electrostatic interaction between the network elements is produced a parasitic resonance at a frequency different from the operational resonance frequency. The method is characterized in that means are provided in the filter arrangement which produce a shifting of the parasitic resonance frequency to a frequency substantially equal to said operational resonance frequency. The invention can be used for filter arrangements.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: July 31, 2007
    Assignee: TEMEX
    Inventor: Serguei Kondratiev