CPC H03H 9/205 (2013.01) [H03H 9/02015 (2013.01); H03H 9/02157 (2013.01); H03H 9/02228 (2013.01); H03H 9/568 (2013.01)] | 21 Claims |
1. An acoustic resonator comprising:
a substrate;
a piezoelectric layer;
an acoustic Bragg reflector between a surface of the substrate and a back surface of the piezoelectric layer; and
a conductor pattern on a front surface of the piezoelectric layer, the conductor pattern comprising:
an interdigital transducer (IDT) comprising a first busbar, a second busbar, and interleaved fingers, wherein the interleaved fingers extend alternately from the first and second busbars, and the interleaved fingers comprise a first finger and a last finger at opposing ends of the IDT;
a first reflector element proximate to the first finger; and
a second reflector element proximate to the last finger,
wherein a distance pr between the first reflector element and the first finger and between the second reflector element and the last finger is greater than a pitch p of the IDT, the pitch p being a center-to-center spacing between at least two fingers of the interleaved fingers of the IDT.
|