US 12,347,914 B2
Giant nonreciprocity of surface acoustic waves enabled by the magnetoelastic interaction
Michael R Page, Powell, OH (US); Piyush J Shah, West Chester, OH (US); and Derek A Bas, Dayton, OH (US)
Assigned to United States of America as represented by the Secretary of the Air Force, Wright-Patterson AFB, OH (US)
Filed by Government of the United States as represented by the Secretary of the Air Force, Wright-Patterson AFB, OH (US)
Filed on Apr. 11, 2022, as Appl. No. 17/717,264.
Claims priority of provisional application 63/180,895, filed on Apr. 28, 2021.
Prior Publication US 2022/0367998 A1, Nov. 17, 2022
Int. Cl. H01P 1/32 (2006.01); H03H 9/02 (2006.01); H03H 9/145 (2006.01); H03H 9/25 (2006.01)
CPC H01P 1/32 (2013.01) [H03H 9/02559 (2013.01); H03H 9/145 (2013.01); H03H 9/25 (2013.01)] 41 Claims
OG exemplary drawing
 
1. A nonreciprocal microwave transmission device comprising:
a substrate;
a transducer on a surface of the substrate and configured to reciprocally convert between electrical signals to acoustic waves;
a first piezoelectric material configured to generates and transports acoustic waves from a signal applied to the transducer; and
a thin film magnetic material configured to couple to acoustic waves through magnetoelastic coupling so as to have non-reciprocal magnetoelastic coupled acoustic wave transport,
wherein transmission of acoustic waves through the thin film magnetic material in a direction toward the transducer has a first magnitude and transmission of acoustic waves through the thin film magnetic material in a direction away from the transducer has a second magnitude, the first and second magnitude being significantly different.