Patent ID: 9544405
Date: 2017-01-10
CPC Classifications: H01Q,H04B,H04M

Claim:
1. A terminal device comprising: an antenna element mounted on a casing of the terminal device to transmit/receive electromagnetic waves; an interface component configured to couple an external device with the terminal device for a wired transmission, the interface component comprising a metal shell configured to have a fixed potential state to shield the wired transmission from noise when the interface component is active for the wired transmission, and to have a floating state to avoid affecting the antenna element for transmitting/receiving electromagnetic waves when the interface component is idle; a switch configured to connect the metal shell to a wound portion of the terminal device when the interface component is active, and disconnect the metal shell from the ground portion of the terminal device to float the metal shell when the interface component is idle; and a detecting and controlling circuit configured to detect a state of the interface component and control the switch based on the state of the interface component.