GIANT NONRECIPROCITY OF SURFACE ACOUSTIC WAVES ENABLED BY THE MAGNETOELASTIC INTERACTION
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United States of America Patent
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Issued Date -
Nov 17, 2022
app pub date -
Apr 11, 2022
filing date -
Apr 28, 2021
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Abstract
A nonreciprocal microwave transmission device includes 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. Transmission of acoustic waves through the thin film magnetic material is 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.
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