RF TAG

摘要

This RF tag comprises an inlay 10 comprising an IC chip 11 and an antenna 12, a planar auxiliary antenna 20 laminated on the inlay 10 in an insulating state to the inlay, a dielectric constant regulation plate 30 which becomes a base on which the inlay 10 including the auxiliary antenna 20 laminated thereon is mounted, and functions as a dielectric constant regulation layer for the mounted inlay 10, and a case 50 (51, 52) which receives therein the dielectric constant regulation plate 30 in a state where the inlay 10 including the auxiliary antenna 20 laminated thereon is mounted. And the dielectric constant regulation plate 30 is formed into a shape which allows the dielectric constant regulation plate 30 to be attachably/detachably and non-movably engaged in the case 50 and which allows the dielectric constant regulation plate to have a predetermined dielectric constant which regulates communication characteristics of the inlay 10 including the auxiliary antenna 20 laminated thereon.