NON-RECIPROCAL CIRCUIT ELEMENT AND COMMUNICATION DEVICE HAVING THE SAME

To reduce an insertion loss in a non-reciprocal circuit element having a structure in which a magnetic rotor is accommodated in a through hole provided in a dielectric substrate.SOLUTION: A non-reciprocal circuit element 1 includes a dielectric substrate 10 having a through hole 11a, a magnetic rotor M accommodated in the through hole 11a, and a permanent magnet 20 that applies a magnetic field to the magnetic rotor M. The magnetic rotor M is supported by the dielectric substrate 10 without being in contact with the inner wall of the through hole 11a. In this way, in the non-reciprocal circuit element 1, since the magnetic rotor M is not in contact with the inner wall of the through hole 11a, an insertion loss can be reduced.SELECTED DRAWING: Figure 8 【課題】誘電体基板に設けられた貫通孔に磁気回転子が収容された構造を有する非可逆回路素子において挿入損失を低減する。【解決手段】非可逆回路素子１は、貫通孔１１ａを有する誘電体基板１０と、貫通孔１１ａに収容された磁気回転子Ｍと、磁気回転子Ｍに磁界を印加する永久磁石２０とを備える。磁気回転子Ｍは、貫通孔１１ａの内壁と接することなく誘電体基板１０に支持されている。このように、非可逆回路素子１は、磁気回転子Ｍが貫通孔１１ａの内壁と接していないことから、挿入損失を低減することが可能となる。【選択図】図８