Back to results
US 10,483,942 B2Granted
Acoustic wave device with acoustically separated multi-channel feedback
AssigneeSkyworks Solutions, Inc.
InventorsRei Goto, Toru Yamaji
Life of this patent
Estimating the term…
Abstract
Aspects of this disclosure relate to an acoustic wave device that includes an acoustic obstacle disposed between canceling circuits coupled to one or more acoustic wave filters. The canceling circuits can cancel frequency components within different frequency bands. The acoustic obstacle can reduce acoustic coupling between the canceling circuits by scattering and/or absorbing acoustic energy.
Claims20
An acoustic wave device comprising:
- a first canceling circuit arranged to cancel frequency components in a first frequency band;
- a second canceling circuit arranged to cancel frequency components in a second frequency band;
- an acoustic wave filter coupled to the first canceling circuit and the second canceling circuit;
- an acoustic obstacle disposed between the first canceling circuit and the second canceling circuit;
- and
- a cavity wall, the acoustic obstacle including the same material as the cavity wall.
3 more elements
A multiplexer comprising:
- a transmit filter including first acoustic wave resonators;
- a receive filter including second acoustic wave resonators, the receive filter and the transmit filter being coupled to each other at a common node;
- a first canceling circuit coupled to the transmit filter and to the receive filter, the first canceling circuit including an interdigital transducer electrode;
- a second canceling circuit coupled to the transmit filter and to the receive filter;
- and
- an acoustic obstacle disposed between the first canceling circuit and the second canceling circuit, the acoustic obstacle and the interdigital transducer electrode each including the same material, and the acoustic obstacle further including a polymer.
3 more elements
A surface acoustic wave device comprising:
- a surface acoustic wave filter;
- and
- a multi-channel feedback circuit coupled to the surface acoustic wave filter, the multi-channel feedback circuit including first interdigital transducer electrodes corresponding to a first channel, second interdigital transducer electrodes corresponding to a second channel, and an acoustic obstacle arranged to reduce acoustic coupling between the first interdigital transducer electrodes and the second interdigital transducer electrodes, the acoustic obstacle and the first interdigital transducer electrodes both including the same material, and the acoustic obstacle further including a polymer.
A surface acoustic wave device comprising:
- a surface acoustic wave filter;
- a multi-channel feedback circuit coupled to the surface acoustic wave filter, the multi-channel feedback circuit including first interdigital transducer electrodes corresponding to a first channel, second interdigital transducer electrodes corresponding to a second channel, and an acoustic obstacle arranged to reduce acoustic coupling between the first interdigital transducer electrodes and the second interdigital transducer electrodes;
- and
- a cavity wall, the acoustic obstacle including the same material as the cavity wall.
1 more element
Dependencies are inferred from the claim text.