Patent ID: 8410938

Claim:
An RFID tag transmitting information recorded on an IC chip by radio, comprising: a first antenna including the IC chip mounted thereon in a central part in a longitudinal direction; a second antenna connected to one end of the first antenna; and a base film having a predetermined dielectric constant and connected to the first antenna and the second antenna; wherein the second antenna includes a first portion having a first end connected to the first antenna at an angle of 90 degrees, and a second portion connected to a second end of the first portion at an angle of 90 degrees, wherein the first antenna and the second portion extend in the same direction with respect to the first portion and oppose each other, wherein a total length of the first portion and the second portion is an integral multiple of λ/2, where λ corresponds to a reduced wavelength due to an effect caused by the predetermined dielectric constant, and wherein the first antenna is shorter than the total length of the first portion and the second portion and the first antenna is longer than the second portion.