| 主权项 |
1. A device for transmitting information wirelessly, the system comprising:
a fixed antenna configured to transmit information wirelessly from the device with a first radiation pattern; a parasitic antenna element having two discrete components positioned near the fixed antenna, or an active antenna element; a switch configured to have a first state and a second state,
wherein in the first state, the switch connects the two discrete components such that the parasitic antenna is resonant with the fixed antenna, and in the second state, the switch leaves the two discrete components disconnected and non-resonant with the fixed antenna, orin the first state, the switch connects the active antenna element to a high impedance part of the fixed antenna, and in the second state, the switch leaves the active antenna element disconnected form the fixed antenna; a controller for setting the switch to the first state or the second state; and a proximity sensor configured to detect when the device is within a predefined distance of the user,
wherein when the proximity sensor detects that the device is within the predefined distance from the user, the controller sets the switch to the first state, and the parasitic element or the active antenna element changes a radiation pattern of the antenna to radiate away from the user, andwherein when the proximity sensor detects that the device is not within the predefined distance from the user, the controller sets the switch to the off state, and the two discrete components of the parasitic element or the active antenna element do not change the radiation pattern of the antenna. |
