Multiplexer and electronic device containing multiplexer

A communication circuit comprising a transmission circuit configured to amplify radio frequency signals to be transmitted through an antenna of an electronic device and a reception circuit configured to amplify radio frequency signals received from the antenna, the communication circuit comprising:

• a first amplifier configured to amplify radio frequency signals to be transmitted to the antenna;
• a multiplexer connected to the first amplifier to output radio frequency signals output from the first amplifier to the antenna, and connected to the antenna to output radio frequency signals received from the antenna to a second amplifier;
• and
• the second amplifier connected to the multiplexer to amplify radio frequency signals output from the multiplexer,
• wherein the multiplexer comprises:
• a first filter configured to allow first transmission signals corresponding to a first frequency band to pass therethrough for output to the antenna,
• a second filter configured to allow second transmission signals corresponding to a second frequency band different from the first frequency band to pass therethrough for output to the antenna, and
• a third filter configured to allow first reception signals corresponding to a third frequency band or second reception signals corresponding to a fourth frequency band, which are received from the antenna, to pass therethrough for output to the second amplifier,
• wherein, when the first transmission signals and the second transmission signals are simultaneously obtained from the first amplifier, the first filter is configured to allow the first transmission signals to pass therethrough for output to the antenna and the second filter is configured to allow the second transmission signals to pass therethrough for output to the antenna.

An electronic device comprising:

• an antenna;
• a communication circuit;
• and
• a processor, comprising processing circuitry, operatively connected to the antenna or the communication circuit,
• wherein the communication circuit comprises:
• a multiplexer comprising a first filter connected to a first amplifier and configured to allow first transmission signals output from the first amplifier and corresponding to a first frequency band to pass therethrough for output to the antenna, a second filter connected to the first amplifier and configured to allow a second transmission signals output from the first amplifier and corresponding to a second frequency band to pass therethrough for output to the antenna, and a third filter configured to allow reception signals received through the antenna to pass therethrough,
• wherein, when the first transmission signals and the second transmission signals are simultaneously obtained from the first amplifier, the first filter is configured to allow the first transmission signals to pass therethrough for output to the antenna and the second filter is configured to allow the second transmission signals to pass therethrough for output to the antenna.