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US 6,043,585 AGranted
Acoustic wave filter
AssigneeNokia Mobile Phones Ltd.
InventorsVictor Plessky, Serguei Kondratiev
Life of this patent
Estimating the term…
Abstract
A surface acoustic wave filter provided on a substrate, in which input "hot" and ground busbars and output "hot" and ground busbars are disposed substantially symmetrically with respect to an axis lying between the input and the output of the filter.
Claims19
A filter comprising:
- a substrate;
- and
- a plurality of electrodes disposed over said substrate;
- wherein a first one of said electrodes surrounds a second one of said electrodes, and a third one of said electrodes surrounds a fourth one of said electrodes, and wherein said first and second electrodes are input terminals of said filter and said third and fourth electrodes are output terminals of said filter;
- and
- further wherein a first portion of said first electrode and a first portion of said second electrode are situated adjacent to one another on said substrate and form at least a portion of at least one first transducer, a second portion of said first electrode and a first portion of said third electrode are situated adjacent to one another on said substrate and form at least a portion of at least one second transducer, and a second portion of said third electrode and a portion of said fourth electrode are situated adjacent to one another and form at least a portion of at least one third transducer.
3 more elements
A filter, said filter comprising:
- a substrate;
- a plurality of electrode regions disposed on said substrate, a first portion of a first one of said electrode regions being situated on said substrate between a first portion of each of a second and a third one of said electrode regions, said first portion of said first electrode region and said first portion of said second electrode region forming at least a portion of a first transducer, said first portion of said first electrode region and said first portion of said third electrode region forming at least a portion of a second transducer, and wherein a second portion of said second electrode region and a second portion of said third electrode region are situated adjacent to one another on said substrate and form at least a portion of a third transducer;
- at least one first capacitive element disposed between a second portion of said first electrode region and a third portion of said second electrode region;
- and
- at least one second capacitive element disposed between a third portion of said first electrode region and a third portion of said third electrode region.
2 more elements
A filter, said filter comprising:
- a substrate;
- a first plurality of electrode regions disposed on said substrate, each electrode region of said first plurality of electrode regions having at least a first portion, said first portion of a first one of said first plurality of electrode regions being situated on said substrate between the first portion of each of a second and a third one of said first plurality of electrode regions, said first portion of said first electrode region and said first portion of said second electrode region forming at least a portion of a first transducer, said first portion of said first electrode region and said first portion of said third electrode region forming at least a portion of a second transducer, and wherein a second portion of said second electrode region and a second portion of said third electrode region are situated adjacent to one another on said substrate and form at least a portion of a third transducer;
- and
- a second plurality of electrode regions disposed on said substrate, each of said second electrode regions having at least a first portion, said first portion of a first one of said second plurality of electrode regions being situated on said substrate between the first portion of each of a second and a third one of said second plurality of electrode regions, said first portion of said first one of said second plurality of electrode regions and said first portion of said second one of said second plurality of electrode regions forming at least a portion of a fourth transducer, said first portion of said first one of said second plurality of electrode regions and said first portion of said third one of said second plurality of electrode regions forming at least a portion of a fifth transducer, and wherein a second portion of said second electrode region of said second plurality of electrode regions and a second portion of said third electrode region of said second plurality of electrode regions are situated adjacent to one another on said substrate and form at least a portion of a sixth transducer.
1 more element
A filter, said filter comprising:
- a substrate;
- a first plurality of electrodes disposed on said substrate, a first portion of a first one of said first plurality of electrodes and a portion of a second one of said first plurality of electrodes being disposed adjacent to one another on said substrate and forming at least a portion of a first transducer, a second portion of said first one of said first plurality of electrodes and a portion of a third one of said first plurality of electrodes being disposed adjacent to one another on said substrate and forming at least a portion of a second transducer, a third portion of said first one of said first plurality of electrodes and a portion of a fourth one of said first plurality of electrodes also being disposed adjacent to one another on said substrate and forming at least a portion of a third transducer;
- and
- a second plurality of electrodes disposed on said substrate, a first portion of a first one of said second plurality of electrodes and a portion of a second one of said second plurality of electrodes being disposed adjacent to one another on said substrate and forming at least a portion of a fourth transducer, a second portion of said first one of said second plurality of electrodes and a portion of a third one of said second plurality of electrodes being disposed adjacent to one another on said substrate and forming at least a portion of a fifth transducer, a third portion of said first one of said second plurality of electrodes and a portion of a fourth one of said second plurality of electrodes also being disposed adjacent to one another on said substrate and forming at least a portion of a sixth transducer;
- wherein a fourth portion of said first one of said first plurality of electrodes and a fourth portion of said first one of said second plurality of electrodes are disposed adjacent to one another on said substrate and form at least a portion of a seventh transducer.
2 more elements
Dependencies are inferred from the claim text.