High frequency characteristics of a planar inductor and a magnetic coupling control device.

Abstract

This paper reports on inductance calculation of a planar inductor and characteristics of a magnetic coupling control device. First, high frequency characteristics of a planar inductor, which consists of a meander coil and two magnetic films, was calculated using Neumann's formula and reluctance method. Taking into consideration the skin effect, proximity effect, eddy current and stray capacitance, the calculated value was in good agreement with the measured value. Second, a magnetic coupling control device was proposed as an application of a planar inductor. It consisted of two meander coils and a magnetic film, which is inserted between the two coils. Experimental results show that a magnetic coupling between the two coils is changed by a magnetic film and that it can be controlled by an external magnetic field.