Electronic device and method for controlling power of transmission signal in transformable electronic device

A method for controlling a power of a transmission signal in an electronic device comprising a first housing, a second housing pivotably coupled with the first housing, a memory, an application processor, a communication processor, at least one radio frequency integrated circuit (RFIC) connected with the communication processor, and a plurality of antennas each disposed inside or in a portion of the first housing or the second housing and connected with the at least one RFIC through at least one radio frequency front-end (RFFE) circuit to transmit or receive a signal corresponding to at least one communication network, the method comprising:

• identifying a change in an antenna-related setting for the plurality of antennas;
• in response to the change in the antenna-related setting, identifying frequency band information for a signal being communicated through at least one antenna among the plurality of antennas;
• identifying folding state information between the first housing and the second housing received from the application processor;
• identifying, from the memory, a transmission power-related setting value set corresponding to the identified frequency band information, the folding state information, and an event related to the communication processor;
• and
• based on the identified transmission power-related setting value, adjusting a power of the transmission signal to be transmitted through at least one antenna among the plurality of antennas.