Communication circuitry for preventing loss of received signals, and electronic device comprising same

A communication circuit comprising:

• a transmission chain configured to output a transmission signal of a first frequency band via an antenna;
• a reception chain configured to receive a reception signal of a second frequency band via the antenna;
• a transceiver electrically connected to the transmission chain and/or the reception chain;
• a coupler configured to transmit a part of the transmission signal transmitted between the transmission chain and/or the reception chain and the antenna to the transceiver;
• and
• a switch electrically connected to the coupler, wherein the switch comprises:
• a first terminal connected to a transceiver side of the coupler;
• a second terminal connected to an antenna side of the coupler;
• a third terminal connected to the matching circuit;
• a fourth terminal connected to the mismatching circuit;
• and
• a fifth terminal connected to the transceiver, and
• wherein the switch is configured to:
• connect the first terminal to the third terminal for a specified time to output the transmission signal via the first transmission chain and thereby connect the coupler and the matching circuit for impedance matching of the coupler and the matching circuit during the specified time to output the transmission signal via the transmission chain, and
• connect the first terminal and the second terminal to the fourth terminal for a specified time to receive the reception signal via the first reception chain and thereby connect the coupler and the mismatching circuit for impedance mismatching of the coupler and the mismatching circuit during the specified time to receive the reception signal via the reception chain.

An electronic device comprising:

• memory storing instructions;
• at least one processor comprising processor circuitry;
• a communication circuit electrically connected to the at least one processor,
• a transmission chain configured to output a transmission signal through an antenna;
• a reception chain configured to receive a reception signal through the antenna;
• a transceiver electrically connected to the transmission chain and/or the reception chain;
• a coupler configured to transmit a part of the transmission signal transmitted between the transmission chain and/or the reception chain and the antenna to the transceiver;
• and
• a switch electrically connected to the coupler, wherein the switch comprises;
• a first terminal connected to a transceiver side of the coupler;
• a second terminal connected to an antenna side of the coupler;
• a third terminal connected to the matching circuit;
• a fourth terminal connected to the mismatching circuit;
• and
• a fifth terminal connected to the transceiver, and
• wherein the instructions, when executed by the at least one processor, individually and/or collectively, cause the electronic device to:
• control the switch to connect the first terminal to the third terminal for a specified time to output the transmission signal via the first transmission chain and thereby connect the coupler and the matching circuit for impedance matching of the coupler and the matching circuit during the specified time to output the transmission signal via the transmission chain, and
• control the switch to connect the first terminal and the second terminal to the fourth terminal for a specified time to receive the reception signal via the first reception chain and thereby connect the coupler and the mismatching circuit for impedance mismatching of the coupler and the mismatching circuit during the specified time to receive the reception signal via the reception chain.