Nec Tokin Corporation

Yoshihiko Kato

Naoharu Yamamoto

Makoto Teshima

Mitsuharu Sato

A coil antenna having a magnetic core and a wire wound around the magnetic core. The magnetic core is flexible and bendable and is made of a mixture including soft magnetic powder and an organic binder agent. The soft magnetic powder comprises a plurality of particles, each of which is coated with an insulator layer which is made of an oxide layer.

Coil antenna

A coil antenna is disclosed comprising a magnetic core and a wire wound around the magnetic core. The magnetic core is made of a mixture comprising soft magnetic powder and an organic binder agent. The magnetic core has a specific complex permeability whose real part &#x3bc;' is 20 or more over a frequency range of 10 MHz or less and whose imaginary part &#x3bc;&#x2033; is 10 or more over a frequency range of 10 MHz or more so that the magnetic core is also servable as a noise suppressor against high-frequency noise.

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Sendai, Japan

Yoshihiko Kato