H - Electricity – 03 – H
Patent
H - Electricity
03
H
H03H 9/64 (2006.01)
Patent
CA 2378303
The invention relates to a surface acoustic wave (SAW) filter of the reactance filter type comprising at least two SAW resonators (R2, R3) in two parallel branches and comprising a SAW resonator (R1) in a serial branch. According to the invention, an electric connection, said connection being produced on the substrate, of the ground sides (12-6, 12-7) of both SAW resonators (R2, R3) in the parallel branches is provided before the connection (12-5) to the housing in order to be able to shift the pole location associated with the parallel branch to a lower frequency.
L'invention concerne un filtre à ondes de surface de type filtre à réactance, comportant au moins deux résonateurs à ondes de surface (R2,R3) dans deux branches parallèles et un résonateur à ondes de surface (R1) dans une branche sérielle. Selon l'invention, il est prévu de réaliser une connexion électrique des faces de masse (12-6, 12-7) des deux résonateurs à ondes de surface (R2,R3) sur le substrat, en deux branches parallèles, avant le raccordement sur le boîtier, afin de permettre au point polaire associé à la branche parallèle de passer à une fréquence plus basse.
Epcos Ag
Fetherstonhaugh & Co.
LandOfFree
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