Patent ID: 11962283
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A method of filtering a radio frequency signal using a piston mode Lamb wave resonator, the method comprising:
providing the radio frequency signal to a filter that includes the piston mode Lamb wave resonator having an active region and a border region, the piston mode Lamb wave resonator including an aluminum nitride piezoelectric substrate, an interdigital transducer electrode in contact with a first side of the aluminum nitride piezoelectric substrate, and an electrode in contact with a second side of the aluminum nitride piezoelectric substrate, the second side opposing the first side; and
filtering the radio frequency signal with the filter, the filtering including generating a Lamb wave in the aluminum nitride piezoelectric substrate, the border region having a first velocity with a lower magnitude that a second velocity of the active region.