HUGH FREQUENCY FILTER

摘要

PROBLEM TO BE SOLVED: To implement sharing of a PA and simplification of the wiring and circuit, without using a switch, in a transmission reception system using a high frequency filter corresponding to multiband.SOLUTION: A high frequency filter 300 has a first output section 363 outputting a first signal, a first reception filter 211, a second reception filter 212, and a matching circuit 322 connected with the output section of the first reception filter and the output section of the second reception filter for matching the first and second reception filters. A first signal is given from one of the output sections of the first and second reception filters to the first output section via the matching circuit. The matching circuit 322 includes the first output section and a resonator 353 connected in series between at least one of the first and second reception filters and the output section.SELECTED DRAWING: Figure 3