Wearable device including electrode for detecting biometric information

An electronic watch comprising:

• a housing comprising a first cover, a second cover, and a metal frame disposed between the first cover and the second cover, the metal frame is at least partly an antenna configured to any of receive and transmit a radio frequency (RF) signal, and the second cover comprises a first electrode and a second electrode that are configured to detect an electrical signal;
• at least one first circuit configured to selectively pass the electrical signal;
• at least one second circuit configured to selectively pass the RF signal;
• a sensor circuit coupled to the first electrode and the second electrode through the at least one first circuit and configured to process the electrical signal;
• a switch circuit coupled to the first electrode and the second electrode through the at least one second circuit, and connected to a ground of the antenna;
• and
• at least one processor operatively connected to the metal frame, the sensor circuit, and the switch circuit, and the at least one processor is configured to:
• any of transmit and receive the RF signal from the antenna,
• obtain biometric information, of a user, based on the electrical signal provided from the sensor circuit;
• and
• control the switch circuit to selectively connect at least one of the first electrode and the second electrode to the ground of the antenna.