Patent ID: 8098133

Claim:
An RFID tag, comprising: an antenna; an IC chip; and a substrate, wherein information recorded in the IC chip is wirelessly transmitted; the antenna is a dipole antenna in a shape of one of part of a curve and part of a polygon, each having a uniform width, and a position of a combined center of gravity of the antenna and the IC chip, and a position of a center of gravity of the substrate coincide with each other, wherein the antenna includes a first antenna portion and a second antenna portion whose lengths are different from each other, and the IC chip is mounted on a boundary of the first antenna portion and the second antenna portion, wherein when a wavelength of an operating frequency is set to λ, an electric length of the first antenna portion is equal to or less than λ/4, and wherein when a wavelength of an operating frequency is set to λ, an electric length of the second antenna portion is equal to λ/2.