Back to results
US 10,340,884 B2Granted
Arrangement comprising a DMS filter and a steep right edge
AssigneeSnapTrack, Inc.
InventorAndreas Bergmann
Life of this patent
Estimating the term…
Abstract
In an arrangement having a DMS filter, it is provided to symmetrically divide at least one of the transducers (W) of the DMS filter (DMS) into two sub-transducers (T,T′) electrically connected in parallel and to shift them apart from each other by an amount of at least a half wavelength. This results in the signals of the two sub-transducers canceling each other out at a frequency in a stopband and thereby generating an attenuation pole in the upper blocking region.
Claims13
An arrangement comprising a DMS filter,
- wherein the DMS filter (DMS) has first and second converters (W1,W2) that are arranged alternately on a piezoelectric substrate between two reflectors (R1, R2) and are each connected to an input or output of the arrangement,
- wherein at least one of the transducers (W1, W2) is symmetrically divided into two sub-transducers electrically connected in parallel, and
- wherein the sub-transducers are shifted apart from each other by an amount of approximately one half wavelength with respect to their original position in such a way that their signals cancel each other out at a frequency in a stopband.
Dependencies are inferred from the claim text.