Patent ID: 6998929

Claim:
A relatively low threshold magneto static surface wave frequency selective limiter, comprising: a substrate; a pair of mutually parallel input and output microstrip transducers and associated impedance matching networks connected to respective input and output signal terminals located on the substrate; an epitaxial YIG film ranging in thickness between about 0.1 μm and 5.0 μm and having a width equal to or less than about 2.0 mm located over the pair of input and output transducers; the transducers having a length at least equal to the width of the YIG film and a mutual separation ranging between 0.25 mm and about 3.0 mm so as to provide an input to output isolation of at least 50 dB; and, means providing a magnetic bias field applied in a plane of the YIG film parallel to the transducers so that magnetostatic surface waves propagate from one of the transducers to the other transducer upon the application of an RF signal to the input signal terminal.