US 12,261,592 B2
Lamb wave delay line
Siarhei Dmitrievich Barsukou, Takarazuka (JP); Rei Goto, Osaka (JP); and Hiroyuki Nakamura, Osaka-Fu (JP)
Assigned to SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Feb. 3, 2022, as Appl. No. 17/591,809.
Claims priority of provisional application 63/146,244, filed on Feb. 5, 2021.
Prior Publication US 2022/0255534 A1, Aug. 11, 2022
Int. Cl. H03H 9/68 (2006.01); H03H 9/02 (2006.01); H03H 9/145 (2006.01); H03H 9/25 (2006.01)
CPC H03H 9/68 (2013.01) [H03H 9/02543 (2013.01); H03H 9/145 (2013.01); H03H 9/25 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A delay line for radio frequency circuits, the delay line comprising:
a piezoelectric substrate;
a transmission single phase unidirectional transducer (SPUDT) disposed on the piezoelectric substrate; and
a receive SPUDT disposed on the piezoelectric substrate and separated from the transmission SPUDT in a direction of transmission of a main acoustic wave mode utilized by the transmission SPUDT, directivity of the transmission SPUDT and the receive SPUDT being such that the transmission SPUDT and the receive SPUDT, when excited, produce main acoustic waves having greatest amplitudes travelling toward one another.