Filter and duplexer

[0029] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of the present application, the terms "first", "second" and the like are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0030] Please see figure 1 , which is a schematic diagram of a duplexer 10 according to an embodiment of the present application. The duplexer 10 of this embodiment includes: a first filter 100 a , a second filter 100 b and an antenna 200 . The first filter 100a includes a first resonator group 110a and a first adjustable inductance group 120a. The second filter 100b includes a second resonator group 110b and a second adjustable inductance group 120b, and the first filter 100a and the second filter 100b are stacked ( figure 1 In is a schematic diagram of two filter stacks separated) and connected