Patent ID: 6208218
Filing Date: 2001-03-27
Classification: H01P

Abstract:
A nonreciprocal circuit device comprising:a dielectric wave guide comprising three dielectric strips disposed between and in contact with two substantially parallel conductive planes;ferromagnetic plates provided substantially parallel to said conductive planes and in the vicinity of end faces of said dielectric strips;two DC magnetic field sources disposed in respective positions on opposite sides of said ferromagnetic plates; andmagnetic material members forming a magnetic path between said two magnetic field sources;wherein said dielectric strips are arranged radially with respect to a center, at respective angles of approximately 120.degree. with said ferromagnetic plates in the center, and said magnetic material members are provided at positions circumferentially between respective adjacent pairs of said dielectric strips and at respective angles of approximately 120.degree.; andwherein said magnetic material members are provided at a distance from said dielectric strips which is equal to or greater than 1/4 of the wavelength of said dielectric wave guide.