Four-port diplexer device

A four-port diplexer device comprising:

• a first port configured to pass signals within a first frequency band and to block signals within a second frequency band;
• a second port configured to pass signals within the second frequency band and to block signals within the first frequency band;
• a third port configured to transmit a first signal portion of a combination of the signals received from the first port and the signals received from the second port;
• and
• a fourth port configured to transmit a second signal portion of the combination of the signals received from the first port and the signals received from the second port,
• wherein the four-port diplexer device is shaped as a cross having four arms, wherein the first port, the second port, the third port and the fourth port are formed at respective end sections of the four arms,
• wherein the first port and the second port are arranged at two opposite end sections of the cross;
• and
• wherein the third port and the fourth port are arranged at the other two opposite end sections of the cross.