Patent ID: 9373072
Filing Date: 2016-06-21
CPC Classification: G06K,H01L,H01Q,Y10T

Claim Text:
1. An antenna comprising: a lead wire including a first power feed portion at one end thereof and a second power feed portion at another end thereof opposite to the one end; wherein the lead wire includes first and second radiation portions in which the lead wire is folded back at a first folded-back portion and a second folded-back portion, respectively, to define a loop shape; a lead wire portion extending toward each of the first and second folded-back portions and another lead wire portion extending away from each of the first and second folded-back portions are arranged adjacent to each other to define a first proximity portion and a second proximity portion, respectively, near the first and second power feed portions, the lead wire portions and the another lead wire portions being electromagnetically coupled at the first and second proximity portions; a loop is defined by the first power feed portion, the first proximity portion, the second proximity portion, and the second power feed portion of the lead wire and functions as an impedance matching portion; a portion of the lead wire including the first proximity portion and the first folded-back portion and another portion of the lead wire including the second proximity portion and the second folded-back portion function as a dipole antenna; the first and second power feed portions, the first and second radiation portions, and the first and second proximity portions are defined by only one single lead wire; the first and second proximity portions are the only electromagnetically coupled portions of the lead wire; and the one end and the another end of the lead wire are connected to an wireless IC chip such that the lead wire and the wireless IC chip define a loop-shaped pattern.