Dispersive delay line with lamb wave propagation
AssigneeSkyworks Solutions, Inc.
InventorSiarhei Dmitrievich Barsukou
Life of this patent
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Abstract
Dispersive delay lines are disclosed. The dispersive delay line can include a piezoelectric substrate having a first interdigital transducer electrode on a first region of the piezoelectric substrate and a second interdigital transducer electrode on a second region of the piezoelectric substrate. The dispersive delay line is arranged such that an acoustic wave is configured to propagate from the first interdigital transducer electrode to the second interdigital transducer electrode though a third region of the piezoelectric substrate. An additional material positioned on the third region of the piezoelectric substrate can impact acoustic wave propagation velocity. Related radio frequency modules, wireless communications devices, and methods are disclosed.
Claims20
A dispersive delay line comprising:
- a piezoelectric substrate including a first region, a second region, and a third region;
- a first interdigital transducer electrode on the first region of the piezoelectric substrate;
- a second interdigital transducer electrode on the second region of the piezoelectric substrate;
- and
- an additional material on the third region of the piezoelectric substrate, the additional material configured to adjust acoustic wave propagation velocity in the third region of the piezoelectric substrate, the dispersive delay line arranged such that a Lamb wave of wavelength λ is configured to propagate from the first interdigital transducer electrode to the second interdigital transducer electrode though the third region of the piezoelectric substrate with a group delay that depends on frequency.
A radio frequency module comprising:
- a dispersive delay line including a piezoelectric substrate, a first interdigital transducer electrode on a first region of the piezoelectric substrate, a second interdigital transducer electrode on a second region of the piezoelectric substrate, and an additional material on a third region of the piezoelectric substrate, the additional material configured to adjust acoustic wave propagation velocity in the third region of the piezoelectric substrate, the dispersive delay line arranged such that a Lamb wave of wavelength λ is configured to propagate from the first interdigital transducer electrode to the second interdigital transducer electrode though the third region of the piezoelectric substrate with a group delay that depends on frequency;
- a radio frequency circuitry coupled to the dispersive delay line;
- and
- packaging structure enclosing the dispersive delay line and the radio frequency circuitry.
A wireless communication device comprising:
- a dispersive delay line including a piezoelectric substrate, a first interdigital transducer electrode on a first region of the piezoelectric substrate, a second interdigital transducer electrode on a second region of the piezoelectric substrate, and an additional material on a third region of the piezoelectric substrate, the additional material configured to adjust acoustic wave propagation velocity in the third region of the piezoelectric substrate, the dispersive delay line arranged such that a Lamb wave of wavelength λ is configured to propagate from the first interdigital transducer electrode to the second interdigital transducer electrode though the third region of the piezoelectric substrate with a group delay that depends on frequency;
- and
- an antenna in communication with the dispersive delay line.
Dependencies are inferred from the claim text.