Reconfigurable duplexer supporting frequency division duplex, time division duplex and full duplex

The invention relates to the technical field of wireless communication systems, in particular to a reconfigurable duplexer supporting frequency division duplex, time division duplex and full duplex, which is provided with a microstrip line structure and a substrate, the microstrip line structure is integrated on the substrate and comprises a resonator I, a resonator II, a resonator III, a resonator IV, a resonator V, a resonator VI and a resonator VII, and the resonator I, the resonator II, the resonator III, the resonator IV, the resonator V, the resonator VI and the resonator VII are integrated on the substrate. Wherein the first resonator, the second resonator, the third resonator and the fourth resonator are mutually coupled to form a first signal channel, the first resonator, the fifth resonator, the sixth resonator and the seventh resonator are mutually coupled to form a second signal channel, and the first resonator is connected with an antenna port through an external coupling module. The fourth reson