Patent ID: 11949403
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An acoustic resonator device comprising:
a substrate;
a piezoelectric plate at least partially supported by the substrate; and
an interdigital transducer (IDT) including interleaved fingers on the piezoelectric plate, the IDT comprising multiple copies of a unit cell juxtaposed along a length of the IDT,
wherein each unit cell comprises:
a first pitch/mark zone having a pitch between adjacent interleaved fingers equal to a first pitch value P1 and a mark of the interleaved fingers equal to a first mark value M1, and
a second pitch/mark zone having a pitch between adjacent interleaved fingers equal to a second pitch value P2 not equal to P1 and a mark of the interleaved fingers equal to a second mark value M2 not equal to M1,
wherein a radio frequency signal applied to the IDT causes the first pitch/mark zone and the second pitch/mark zone to excite a same shear primary acoustic mode in the piezoelectric plate.