Electronic device and method for improving performance of antenna of electronic device

An electronic device comprising:

• a feeding unit configured to be provided with a feeding signal from a communication circuit of the electronic device;
• an antenna electrically connected to the feeding unit;
• a first electronic component disposed in the electronic device;
• a first mounting unit positioned in a first direction of the feeding unit and comprising a portion of the first electronic component, disposed near the antenna;
• a ground;
• a first ground terminal and a second ground terminal, positioned on the first electronic component and included in a circuit configured to electrically connect the ground to the first electronic component;
• a first bead positioned between the second ground terminal and the first mounting unit;
• a first switch positioned at a side of the ground to electrically connect the ground to the first ground terminal or electrically connect the ground to the second ground terminal;
• and
• at least one processor configured to control an operation of the first switch,
• wherein the at least one processor is configured to:
• electrically connect the first switch to the first ground terminal such that the first mounting unit is electrically connected to the ground without going through the first bead, or
• electrically connect the first switch to the second ground terminal such that the first mounting unit is electrically connected to the ground through the first bead, and
• wherein the feeding unit is configured to apply a radio-frequency (RF) signal by using the first mounting unit disposed in the antenna.