ISOLATOR FOR MICROWAVE ELECTROMAGNETIC RADIATION

摘要

Inserts for non-reciprocal waveguide devices comprises a layer (12) of ferrite and a layer (13) of energy absorbing material with a spacer layer (14) between them. The device works by reason of asymmetrical interaction of the microwave energy and the ferrite whereby energy is preferentially absorbed in the reverse direction. The spacer layer affects the distribution of electromagnetic fields so that there is a relatively low attenuation associated with one direction and a relatively high attenuation associated with the reverse direction.