Read/Search this Article Requirements for the use of IC tags on
metallic objects have increased recently as systems that use IC
tags have become widely adopted. We have proposed and designed a
structure for an IC tag that operates on metallic objects. The
structure of the IC tag consists of a conductive metal sheet at
the bottom and a thin magnetic core made of a high-permeability
composite sheet, which is inserted between the receiver coil and
the metal sheet. With this structure, magnetic coupling between
the antenna coil and the receiver coil is enhanced; furthermore,
the influence of the metallic body to which an IC tag is
attached is well suppressed. The method used to fabricate
magnetic powders for the composite sheet is investigated
together with the effect of the rolling process used to make a
sheet on the magnetic anisotropy induced in the sheet. The
permeability and quality factor are characterized for five
samples in the frequency range from 10MHz to 1000MHz. The best
fabrication method for magneti