DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION DEVICE

摘要

Disclosed is a small duplexer which exerts excellent isolation. Disclosed is a duplexer provided with an unbalanced transmission filter (31), a balanced reception filter (32), a transmission port (33) connected to the transmission filter (31), and a main reception port (34a) and a sub-reception port (34b) connected to the reception filter (32), wherein the duplexer is also provided with an electrostatic coupling section (36) which is connected between the transmission port (33) and the main reception port (34a) and between the transmission port (33) and the sub-reception port (34b). The electrostatic coupling section (36) adjusts the phase of the power which flows from the transmission port (33) to the main reception port (34a) and of the power which flows from the transmission port (33) to the sub-reception port (34b).