Composite magnetic body

特許 権利維持 PROBLEM TO BE SOLVED: To solve the problem where the deterioration of magnetic characteristics due to an eddy current cannot be avoided when using a composite magnetic body as a high-frequency circuit board, or the like. ; SOLUTION: Magnetic powder is dispersed in an insulating material without any aggregation, thus obtaining the composite magnetic body where relative permeability [mu]r is larger than 1 at 1 GHz and loss tangent tan[delta]is not more than 0.1.