Dual-mode surface-active wave filter with improved symmetry...

Details Dual-mode surface-active wave filter with improved symmetry... Dual-mode surface-active wave filter with improved symmetry...

H - Electricity

03

H

H03H 9/64 (2006.01)

Patent

CA 2381262

Dual mode SAW filter with improved symmetry and/or blocking attenuation by selecting the structure in one-track, two-track embodiment and with potentially split track (10', 10"), whereby first transducers (11, 111, ...) and second transducers (21, 22 ...), these as input transducers and/or output transducers and/or coupling transducers (given multi-track embodiment), always have an even- numbered plurality of fingers and are point-symmetrical.

La présente invention concerne un filtre à ondes de surface (SAW) bimode à symétrie améliorée et/ou affaiblissement hors bande amélioré par choix d'une structure de réalisation à une ou deux pistes, la/les piste(s) (10', 10") étant éventuellement subdivisées. Un premier convertisseur (11, 111...) et un second convertisseur (21, 22...), jouant le rôle de convertisseur d'entrée et/ou de sortie et/ou de couplage (pour des réalisations à pistes multiples), ont toujours un nombre pair de peignes et présentent une symétrie ponctuelle.

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