Patent ID: 8742895
Filing Date: 2014-06-03
Classification: G06K,H01Q,H04K

Abstract:
1. A wireless communication improving sheet for improving wireless communication properties of a wireless IC tag by arranging the wireless IC tag, comprising: a non-conductive first spacer having an arrangement surface that receives the wireless IC tag without connecting the wireless IC tag with a wire; an auxiliary antenna provided on a surface of the first spacer opposite to the arrangement surface of the first spacer; and a non-conductive second spacer provided on the auxiliary antenna on an opposite side to the first spacer with the auxiliary antenna interposed therebetween, they being laminated one on top of another, the auxiliary antenna is formed with a hole or notch and is composed of one conductor part, wherein the hole or notch opens onto a surface of the second spacer and electromagnetically couples to the wireless IC tag by utilizing a region of the hole or notch where a magnetic field within the auxiliary antenna is strongest and an electric field within the auxiliary antenna is lowest, and wherein a depth of the hole or notch is the same as the total thickness of the first spacer and the auxiliary antenna.