| 摘要 |
<p>PURPOSE:To provide a plurality of transmission characteristics and enable transmission of a plurality of signals having different frequency bands by constituting a core of a plurality of materials different in magnetic permeability. CONSTITUTION:A groove is provided on a face of a rotating core 1 opposite to a fixed core 2, while a rotating coil 3 is wound by a predetermined number of turns. A groove is provided on a core 2 facing the face of the rotating core 1 at a part opposite to the groove on the rotating side, while a fixed coil 4 is wound by a predetermined number of turns. Materials of the cores 1,2 differ in every pair of the coils, while 1a and 2a are cores with magnetic permeability A, 1b and 2b are cores with magnetic permeability B and 1c and 2c are cores with magnetic permeability C. Since the cores are constituted of materials different in magnetic permeability for every pair of the coils and the magnetic permeability is appropriately specified, optimum conducting characteristics can be obtained for each of a plurality of signals having different frequency bands and it is possible to transmit a plurality of signals having different frequency bands.</p> |
