Apparatus for controlling radiation power in dual mode mobile terminal and method thereof

An apparatus for controlling transmission power of a mobile terminal in a call waiting state, having two antennas for supporting two different communication networks, the apparatus comprising:

• a first Radio Frequency (RF) communication unit for receiving a call from a first communication network and transmitting a call to the first communication network;
• a second RF communication unit for receiving a call from a second communication network and transmitting a call to the second communication network;
• a transmission power regulator for adjusting call transmission powers of the first and second RF communication units;
• and
• a control unit for holding, when a call is received from the second communication network while communicating with the first communication network, the call of the first communication network in a waiting state, and for controlling the transmission power regulator to reduce the call transmission power to the first RF communication unit.