Fundamental Study on Tunable RF Magnetic Devices Using DC Bias Magnetic Field Generated by Permanent Magnet Film
Journal of The Magnetics Society of Japan(2012)
Abstract
A tunable coplanar resonator using a combination of high-permeability soft magnetic thin film/permanent magnet film was fabricated and evaluated. The magnetic pole based on the remanent magnetization of permanent magnet film, which is controlled by a pulse-current magnetization scheme, generates a dc bias magnetic field in the soft magnetic film. Consequently, the permeability of the soft magnetic film can be controlled by changing the pulse-current magnetization for the permanent magnet film. A scheme to control the permeability of the soft magnetic film is described here, and fabrication and evaluation of the tunable coplanar-resonator are also explained.
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Key words
Planar Circuits
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