Multiplexer and communication device

A multiplexer configured to simultaneously transfer a radio frequency signal in a first communication band and a radio frequency signal in a second communication band different from the first communication band, the multiplexer comprising:

• a common terminal;
• a first filter connected to the common terminal, the first filter having a passband including a reception band of the first communication band;
• a second filter connected to the common terminal, the second filter having a passband including a transmission band of the first communication band;
• a third filter connected to the common terminal, the third filter having a passband including a transmission band of the second communication band;
• and
• a fourth filter connected to the common terminal, the fourth filter having a passband including a reception band of the second communication band, wherein:
• the transmission band of the first communication band and the transmission band of the second communication band are located between the reception band of the first communication band and the reception band of the second communication band,
• at least one of the first communication band or the second communication band is a 5G-NR communication band,
• the first filter includes a first input or output terminal connected to the common terminal,
• the second filter includes a second input or output terminal connected to the common terminal,
• the third filter includes a third input or output terminal connected to the common terminal,
• the fourth filter includes a fourth input or output terminal connected to the common terminal,
• the first communication band is a 5G-NR communication band,
• the second communication band is a 4G-LTE communication band, and
• a length of a signal line connecting the second input or output terminal and the common terminal is less than or equal to a length of a signal line connecting the first input or output terminal and the common terminal, and is less than or equal to a length of a signal line connecting the third input or output terminal and the common terminal, and is less than or equal to a length of a signal line connecting the fourth input or output terminal and the common terminal.

A multiplexer configured to simultaneously transfer a radio frequent signal in a first communication band and a radio frequency signal in a second communication band different from the first communication band, the multiplexer comprising:

• a common terminal;
• a first filter connected to the common terminal, the first filter having a passband including a reception band of the first communication band;
• a second filter connected to the common terminal, the second filter having a passband including a transmission band of the first communication band;
• a third filter connected to the common terminal, the third filter having a passband including a transmission band of the second communication band;
• and
• a fourth filter connected to the common terminal, the fourth filter having a passband including a reception band of the second communication band,
• wherein
• the transmission band of the first communication band and the transmission band of the second communication band are located between the reception band of the first communication band and the reception band of the second communication band, and
• at least one of the first communication band or the second communication band is a 5G-NR communication band,
• the first filter includes a first input or output terminal connected to the common terminal,
• the second filter includes a second input or output terminal connected to the common terminal,
• the third filter includes a third input or output terminal connected to the common terminal,
• the fourth filter includes a fourth input or output terminal connected to the common terminal,
• the first communication band is a 5G-NR communication band,
• the second communication band is a 4G-LTE communication band,
• a length of a signal line connecting the second input or output terminal and the common terminal is less than or equal to a length of a signal line connecting the first input or output terminal and the common terminal and is less than or equal to a length of a signal line connecting the fourth input or output terminal and the common terminal, and
• a length of a signal line connecting the third input or output terminal and the common terminal is less than or equal to the length of the signal line connecting the first input or output terminal and the common terminal and is less than or equal to the length of the signal line connecting the fourth input or output terminal and the common terminal.