Method using signal component of multiplied frequency and electronic device therefor

An electronic device comprising:

• an antenna;
• a transmission path electrically connected to the antenna and including at least one amplifier;
• a transceiver connected to the transmission path and configured to convert a signal;
• a feedback path connected between the transmission path and the transceiver;
• at least one processor connected to the transceiver and configured to communicate with at least one external electronic device by using the transceiver;
• and
• a memory connected to the at least one processor, wherein the memory stores one or more instructions that, when executed, cause the at least one processor to:
• transmit a first signal of a first frequency through the transmission path, using the transceiver,
• obtain a transmission signal and a reflection signal of the transmission signal, which are associated with transmission of the first signal, through the feedback path using the transceiver,
• obtain first information about a first phase and a first magnitude, which are associated with the first frequency, and second information about a second phase and a second magnitude, which are associated with a multiplied frequency of the first frequency, from the transmission signal and the reflection signal using the transceiver, and
• determine a state of the electronic device based on the first information and the second information.