Patent ID: 7817102

Claim:
An antenna connected to a circuit portion and configured to effect transmission and reception of information by radio communication, said antenna comprising: a driven meander line portion which has a feed section connected to the circuit portion and which is a line conductor formed in a meandering pattern; and a parasitic meander line portion which does not have a feed section connected to the circuit portion and which is a line conductor formed in a meandering pattern, the parasitic meander line portion being positioned relative to the driven meander line portion, so as to influence an input impedance of the driven meander line portion, wherein the driven and parasitic meander line portions have respective extensions of the line conductors formed at respective opposite longitudinal ends of the antenna, and wherein the extension of the driven meander line portion is disposed at a first end of the antenna and extends beyond a first endpoint of the parasitic meander line portion at the first end of the antenna, and the extension of the parasitic meander line portion is disposed at a second end of the antenna and extends beyond a second endpoint of the driven meander line portion at the second end of the antenna.