| 摘要 |
PROBLEM TO BE SOLVED: To provide a high frequency filter circuit and a high frequency mixer, capable of adjusting a phase of common mode unwanted wave included in a differential signal.SOLUTION: A high frequency filter circuit includes: a variable capacitance element 42 connected between the other end of a transmission line 39 and ground; a variable capacitance element 43 connected to the other end of a transmission line 40 and the ground; and a control circuit 50 configured to adjust the capacitance of the variable capacitance elements 42 and 43. Thus, a phase of a common mode unwanted wave, included in a differential signal can be adjusted. Therefore, even if a characteristic of a high frequency filter circuit 1 is drifted from a designed value, common mode unwanted wave can be sufficiently suppressed.SELECTED DRAWING: Figure 1 |
