| 摘要 |
PROBLEM TO BE SOLVED: To provide a coil capable of obtaining a sufficient impedance in a high frequency band of e.g. 150 kHz-30 MHz. SOLUTION: The coil 10 comprises a first ferrite core 11, a second ferrite core 12, and coil conductors 13A, 13B integrally wound about those ferrite cores 11, 12. The second ferrite core has a frequency characteristic that the attenuation region of the permeability thereof exists on the higher frequency side of that of the first ferrite core. According to this configuration, the sufficient impedance can be obtained in the high frequency band of e.g. 150 kHz-30 MHz. COPYRIGHT: (C)2006,JPO&NCIPI
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