Abstract: An electronic device includes an antenna including a ground part, a feeding part, and a radiator and a first switch interposed between the feeding part and the radiator. A signal supplied through the feeding part is transmitted through a first path, a second path, or a third path that connects the feeding part to the radiator. The first switch is configured to change a connection state of the second path and the third path, and the third path includes a variable capacitor.

Abstract: An electronic device includes an antenna including a ground part, a feeding part, and a radiator and a first switch interposed between the feeding part and the radiator. A signal supplied through the feeding part is transmitted through a first path, a second path, or a third path that connects the feeding part to the radiator. The first switch is configured to change a connection state of the second path and the third path, and the third path includes a variable capacitor.

Abstract: An electronic device includes a communication interface configured to establish a communication channel; and a controller configured to adjust an amplification current of a signal outputted through the communication channel corresponding to a measured Adjacent channel leakage ratio (ACLR) based on the communication channel, wherein the controller is configured to adjust a size of the amplification current corresponding to a difference between the measured ACLR and a specified condition.

Abstract: An electronic device includes a communication interface configured to establish a communication channel; and a controller configured to adjust an amplification current of a signal outputted through the communication channel corresponding to a measured Adjacent channel leakage ratio (ACLR) based on the communication channel, wherein the controller is configured to adjust a size of the amplification current corresponding to a difference between the measured ACLR and a specified condition.

Abstract: An apparatus and method for applying digital pre-distortion (DPD) technology in an electronic device which uses an envelope tracking (ET) method is provided. The electronic device includes an antenna, a modem, a transceiver configured to convert a signal generated in the modem into a radio frequency signal, an ET modulator configured to supply power to a power amplifier based on an amplitude component of the signal generated in the modem, and the power amplifier configured to amplify power of a signal received from the transceiver based on an output signal of the ET modulator. The modem generates a signal by using a DPD) variable corresponding to output impedance of the power amplifier caused by the antenna from among a plurality of DPD variables.

Abstract: An apparatus and method for applying digital pre-distortion (DPD) technology in an electronic device which uses an envelope tracking (ET) method is provided. The electronic device includes an antenna, a modem, a transceiver configured to convert a signal generated in the modem into a radio frequency signal, an ET modulator configured to supply power to a power amplifier based on an amplitude component of the signal generated in the modem, and the power amplifier configured to amplify power of a signal received from the transceiver based on an output signal of the ET modulator. The modem generates a signal by using a DPD) variable corresponding to output impedance of the power amplifier caused by the antenna from among a plurality of DPD variables.