Patent ID: 10200012

Abstract:
A high-frequency filter (10) includes resonators (21, 31, and 32), an inductor (41), and a switch (51). The resonator (21) is connected between a first input/output terminal (P1) and a second input/output terminal (P2). One end of the inductor (41) is connected between the resonator (21) and the first input/output terminal (P1). One end of the resonator (31) is connected to the other end of the inductor (41). The switch (51) selects either a connection portion that connects the inductor (41) and the resonator (31) or the resonator (32) and connects either the connection portion or the resonator (32), which has been selected, to a terminal of the resonator (21) on the side of the second input/output terminal (P2). The switching between the connection modes of the switch (51) changes the circuit configuration of the high-frequency filter (10).