Non-reciprocal circuit element having a magnetic member integral with

Abstract

A non-reciprocal circuit element of reduced weight and manufactured at a lower cost without deteriorating the parallelism and the magnetic field distribution of a unidirectional magnetic field. The non-reciprocal circuit element may be a circulator having a ferrite member having a center electrode section in which a plurality of electrode lines which function as inductance components are disposed so as to intersect each other, forming a predetermined angle therebetween while being electrically insulated from each other. In this circulator, a magnetic member made of a magnetic material having a permeability higher than that of the ferrite member is formed integrally with a lower surface of the ferrite member. The ferrite member also has matching capacitance electrodes connected to input/output ports of the electrode lines to function as capacitance components. The center electrode section and the matching capacitance electrodes are incorporated in the ferrite member. A permanent magnet is also provided to apply a unidirectional magnetic field to an intersection portion of the center electrode section of the ferrite member.