Mobile communication device and radiated power adjusting method thereof

A mobile communication device, comprising:

• at least two antennas;
• a transceiver having a signal measurement module, coupled to one of the at least two antennas and measuring a signal parameter of a radio-frequency signal, wherein the one of the at least two antennas receives the radio-frequency signal, the radio-frequency signal is a wireless radio-frequency signal which is external to the mobile communication device, the signal parameter comprises a signal quality of the radio-frequency signal received by the one of at least two antennas;
• a capacitive proximity sensing module comprising a sensing conductor and configured to detect an object through the sensing conductor according to a sensing capacitance between the sensing conductor and a ground plane, wherein the sensing conductor is configured adjacent to an adjusted antenna which is another one of the at least two antennas, the capacitive proximity sensing module operates in an activation mode in response to determining the object exists, and the capacitive proximity sensing module operates in an original mode in response to determining the object does not exist;
• and
• a controlling module, coupled to the adjusted antenna among the at least two antennas, the signal measurement module and the capacitive proximity sensing module, and configured to determine whether a decrement within a time interval of the signal parameter of the radio-frequency signal received by the one of at least two antennas is larger than a threshold value, and adjust a radiated power of the adjusted antenna in response to whether the decrement within the time interval of the signal parameter is larger than the threshold value and whether the capacitive proximity sensing module is operating in the activation mode or the original mode,
• wherein the controlling module reduces the radiated power of the adjusted antenna in response to the decrement within the time interval of the signal parameter of the radio-frequency signal received by the one of the at least two antennas being larger than the threshold value and the capacitive proximity sensing module determining the object exists and operating in the activation mode,
• wherein the controlling module adjusts the radiated power of the adjusted antenna to an original radiated power value in response to the decrement within the time interval of the signal parameter of the radio-frequency signal received by the one of the at least two antennas being not larger than the threshold value and the capacitive proximity sensing module determining the object does not exist and operating in the original mode.