DUAL BAND ANTENNA UNIT OF MOBILE DEVICE

摘要

A dual band antenna unit of a mobile device is provided to transmit and receive signals of a plurality of frequency bands by shrinking or extending the antenna unit of the mobile device. A dual band antenna unit(200) of a mobile device includes a first feed point(211), a second feed point(212), a first antenna part(220), and a second antenna part(230). The second feed point is separated from the first feed point. The first antenna part is equipped with a first contact(222) and a second contact(223) separated from each other. The second antenna part is integrated in the first antenna part while sharing the first contact. The second antenna part is shrinkable and extensible. The first antenna part has a resonance frequency corresponding to a first frequency band. The second antenna part has a resonance corresponding to a second frequency band at the time of tensioning. When the second antenna part is tensioned, the first contact and second contact are connected to the first feed point and the second feed point, respectively.