Apparatus for suppression of spurious attenuation poles in...

Details Apparatus for suppression of spurious attenuation poles in... Apparatus for suppression of spurious attenuation poles in...

H - Electricity

03

H

333/61

H03H 9/56 (2006.01)

Patent

CA 1204178

Abstract Piezoelectric filter includes a piezoelectric substrate having an upper and lower opposed major surfaces. A plurality of N coupled resonators where N is an integer greater than two exposed on the sur- face of the substrate. A plurality of mounting pedestals are utilized to couple the resonators to ground in a manner such that no two non-adjacent resonators are coupled to any one pedestal. This mounting scheme suppresses undesired spurious atten- uation poles and improves the selectivity of the piezoelectric filter.

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