Frequency tunable rf phase shifter or circulator having a wide-band saw-multiferroic hybrid device

A nonreciprocal microwave phase shift device comprising:

• a substrate;
• a plurality of transducers on a surface of the substrate and configured to reciprocally convert between electrical signals and acoustic waves;
• a first piezoelectric material configured to generate and transport acoustic waves from a signal applied to a first transducer of the plurality of transducers;
• 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 a second transducer of the plurality of transducers has a first magnitude and transmission of acoustic waves through the thin film magnetic material in a direction away from the second transducer of the plurality of transducers has a second magnitude, the first and second magnitudes being significantly different.