| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a contactless IC tag capable of simultaneously transmitting/receiving left hand circularly polarized wave signals and right hand circularly polarized wave signals and securing proper communication state at broadband, using an IC chip having diversity facility. <P>SOLUTION: A contactless IC tag 1 is formed by arranging a first loop antenna 4 and a second loop antenna 5 in a substantially vertical fashion on a base film 2, through an IC chip 3 having diversity facility. A flat antenna 11 is an antenna of a closed loop shape and composed of independent conductors, wherein the flat antenna 11 has: an antenna 6 formed of two substantial rectangles; and a pair of perturbation element portions 7 arranged diagonally at corners of the antenna 6. The flat antenna 11 is formed on a backside of goods 8. On front face of the goods 8, an inlet 10 is arranged so that the outer sides of the first loop antenna 4 and the second loop antenna 5 are located in parallel and close to the peripheral edges of the antenna 6. <P>COPYRIGHT: (C)2009,JPO&INPIT |
