A communication device comprising: an antenna (150, 750); a front-end switching circuit (780a, 780b, 880) electrically connected with the antenna (150, 750); a transceiver (110, 710, 810); a transmitting amplifier (120, 721a, 721b, 722a, 722b, 821, 822) configured to amplify an output signal outputted from the transceiver (110, 710, 810); a plurality of duplexers (170, 770a, 770b, 970) including a first duplexer and a second duplexer, the first duplexer forming a first portion of a first signal path between the front-end switching circuit (780a, 780b, 880) and the transceiver (110, 710, 810), and the second duplexer forming a first portion of a second signal path between the front-end switching circuit (780a, 780b, 880) and the transceiver (110, 710, 810); a plurality of back-end switching circuits including a first back-end switching circuit (791a, 791b, 891) and a second back-end switching circuit (792a, 792b, 892), the first back-end switching circuit (791a, 791b, 891) forming a second portion of the first signal path, and the second back-end switching circuit (792a, 792b, 892) forming a second portion of the second signal path; and a plurality of receiving amplifiers including a first receiving amplifier (731a, 731b, 831) and a second receiving amplifier (732a, 732b, 832), the first receiving amplifier (731a, 731b, 831) electrically connected between the first back-end switching circuit (791a, 791b, 891) and the transceiver (110, 710, 810) and forming a third portion of the first signal path, and the second receiving amplifier (732a, 732b, 832) electrically connected between the second back-end switching circuit (792a, 792b, 892) and the transceiver (110, 710, 810) and forming a third portion of the second signal path; wherein the second portion of the first signal path is electrically connected between the first portion of the first signal path and the third portion of the first signal path, wherein the second portion of the second signal path is electrically connected between the first portion of the second signal path and the third portion of the second signal path, and wherein, with respect to an input signal received via the antenna (150, 750), a first connection and a second connection between the antenna (150, 750) and the transceiver (110, 710, 810) are simultaneously provided, the first connection to be established using the front-end switching circuit (780a, 780b, 880) and the first signal path, and the second connection to be established using the front-end switching circuit (780a, 780b, 880) and the second signal path. an antenna (150, 750); a front-end switching circuit (780a, 780b, 880) electrically connected with the antenna (150, 750); a transceiver (110, 710, 810); a transmitting amplifier (120, 721a, 721b, 722a, 722b, 821, 822) configured to amplify an output signal outputted from the transceiver (110, 710, 810); a plurality of duplexers (170, 770a, 770b, 970) including a first duplexer and a second duplexer, the first duplexer forming a first portion of a first signal path between the front-end switching circuit (780a, 780b, 880) and the transceiver (110, 710, 810), and the second duplexer forming a first portion of a second signal path between the front-end switching circuit (780a, 780b, 880) and the transceiver (110, 710, 810); a plurality of back-end switching circuits including a first back-end switching circuit (791a, 791b, 891) and a second back-end switching circuit (792a, 792b, 892), the first back-end switching circuit (791a, 791b, 891) forming a second portion of the first signal path, and the second back-end switching circuit (792a, 792b, 892) forming a second portion of the second signal path; and a plurality of receiving amplifiers including a first receiving amplifier (731a, 731b, 831) and a second receiving amplifier (732a, 732b, 832), the first receiving amplifier (731a, 731b, 831) electrically connected between the first back-end switching circuit (791a, 791b, 891) and the transceiver (110, 710, 810) and forming a third portion of the first signal path, and the second receiving amplifier (732a, 732b, 832) electrically connected between the second back-end switching circuit (792a, 792b, 892) and the transceiver (110, 710, 810) and forming a third portion of the second signal path; wherein the second portion of the first signal path is electrically connected between the first portion of the first signal path and the third portion of the first signal path, wherein the second portion of the second signal path is electrically connected between the first portion of the second signal path and the third portion of the second signal path, and wherein, with respect to an input signal received via the antenna (150, 750), a first connection and a second connection between the antenna (150, 750) and the transceiver (110, 710, 810) are simultaneously provided, the first connection to be established using the front-end switching circuit (780a, 780b, 880) and the first signal path, and the second connection to be established using the front-end switching circuit (780a, 780b, 880) and the second signal path.