NON-RECIPROCAL CIRCUIT ELEMENT

Provided is a non-reciprocal circuit element having a simple structure and superiority in assembly, with which it is possible to prevent ferrite plate fracturing and implement a lower profile and miniaturization with ease. In the present invention: a central conductor (1), wherein oscillators (3) which each extend outward are formed between I/O terminals (2a-2c) which extend outward in a Y-shape from the center of the main body; upper and lower ferrite plates (5, 6) which sandwich the central conductor (1) therebetween, including the oscillators (3); and upper and lower part magnetic metal plates (7, 8) which sandwich the upper and lower ferrite plates therebetween; are stacked. A magnet (10) is positioned upon the upper magnetic metal (7). By forming curved parts (4) in the leading end parts (3a) of the oscillators (3) of the central conductor (1), which are bent in a direction out of the plane and form an interstice (G) between the central conductor (1) and the upper ferrite plate (5), the upper ferrite plate (5) is disposed to be freely detachable from the central conductor (1) by the elasticity of the curved parts (4). Additionally, the present invention provides a non-reciprocal circuit element with which it is possible, without excessively increasing the magnetic field strength of a magnet, to obtain a desired circulator characteristic, and which is further usable in a wideband including especially high-frequency bands. To this end, provided is a non-reciprocal circuit element whereon the I/O terminals (2a-2c) are integrally formed, and the upper and lower magnetic metal plates (7, 8) form a closed magnetic circuit via lateral plates (9). The upper magnetic metal plate (7) is formed by a substance having a lower magnetic permeability than pure iron, and/or is formed in a thickness (t) which is thinner than the thickness (T) of the lower magnetic metal plate (8). La présente invention concerne un élément de circuit non réciproque présentant une structure simple et une supériorité d'assemblage, grâce auquel il est possible d'empêcher la fracture de plaques de ferrite et d'obtenir facilement un profil plus compact et une miniaturisation. Selon la présente invention comporte: un conducteur central (1), dans lequel des oscillateurs (3) qui se prolongent chacun vers l'extérieur sont formés entre des bornes d'entrée/sortie (2a-2c) qui s'étendent vers l'extérieur en une configuration en Y depuis le centre du corps principal ; des plaques de ferrite (5, 6) qu