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1. (WO2018037654) IRREVERSIBLE CIRCUIT ELEMENT, FRONT-END CIRCUIT, AND COMMUNICATION DEVICE

Pub. No.:    WO/2018/037654    International Application No.:    PCT/JP2017/020138
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Wed May 31 01:59:59 CEST 2017
IPC: H01P 1/383
H01P 1/387
Applicants: MURATA MANUFACTURING CO., LTD.
株式会社村田製作所
Inventors: HINO, Seigo
日野 聖吾
Title: IRREVERSIBLE CIRCUIT ELEMENT, FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
Abstract:
An irreversible circuit element (1) is provided with a permanent magnet (30) and ferrite (40), which are provided between a first yoke (10) and a second yoke (20). In a cross sectional view obtained by cutting the first yoke (10), second yoke (20), permanent magnet (30), and ferrite (40) in the direction in which the first yoke (10), second yoke (20), permanent magnet (30), and ferrite (40) are stacked, the ferrite (40) has a thickness that is smaller than that of the permanent magnet (30), and the permanent magnet (30) is disposed on the outer side of the side surfaces of the ferrite (40), and has a pair of side surfaces (31) facing each other. When the distance between the pair of side surfaces (31) in a region (A1) where the ferrite (40) is present between the side surfaces is represented by D1, and the distance between the pair of side surfaces (31) in a region (A2) where the ferrite (40) is not present therebetween is represented by D2, the permanent magnet (30) has a portion where formula of D2