Nonreciprocal circuit device including dielectric wave guide and a lower dielectric constant medium

Abstract

A nonreciprocal circuit device comprises a dielectric wave guide comprising a dielectric body with a center and with strips extending radially from the center in at least two directions and arranged between two conductor plates defining parallel conductor planes; a ferrite body arranged in the center of the dielectric strip; and a medium having a lower dielectric constant than the dielectric body arranged between at least a side face of the ferrite body and the conductor plates adjacent to the side face of the ferrite body. Grooves into which a dielectric strip is fitted are formed in the opposing surfaces of two conductor plates. The width of the dielectric strip is increased in the center of the dielectric strip and in the direction along the conductor planes of the conductor plates. At the widened location, a space is formed between the side walls of the grooves and the side faces of the ferrite sheets.