Ladder saw filter contained in a single acoustic track
AssigneeAdvanced SAW Products SA
InventorsViktor P. Plesski, Thor Thorvaldsson, Serguei N. Kondratiev
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Abstract
A first interdigitated transducer and a second interdigitated transducer are disposed such that an acoustic port of the first interdigitated transducer confronts an acoustic port of the second interdigitated transducer. A first electric terminal of respective interdigitated transducers are electrically coupled together. The first and second interdigitated transducers have different resonance frequencies and may be acoustically coupled.
Claims20
A ladder surface acoustic wave filter, comprising a piezoelectric substrate, a first interdigitated transducer disposed on said substrate having a first resonance frequency and a second interdigitated transducer disposed on said substrate having a second resonance frequency, an acoustic port of the first interdigitated transducer disposed in an acoustic channel confronting an acoustic port of the second interdigitated transducer in the same acoustic channel as said first interdigitated with acoustic interaction between said confronting acoustic ports and wherein a first electric terminal of the first interdigitated transducer is electrically coupled to a first electric terminal of the second interdigitated transducer.
Dependencies are inferred from the claim text.