Amplitude frequency characteristic compensation circuit, wireless device and amplitude frequency characteristic compensation method

摘要

PROBLEM TO BE SOLVED: To provide an amplitude frequency characteristic compensation circuit which has an amplitude characteristic in which an amplitude change at the time of a frequency change is steep and can be miniaturized. An amplitude frequency characteristic compensation circuit 10 has a stub 3 connected in parallel to a main line 2 for radio signal propagation. The stub 3 has a resistor 4 directly connected to the main line 2, a plurality of wires 6, and a plurality of wire bonding patterns 5 for bonding and connecting between the resistor 4 and any one of the wires 6 and between the plurality of wires 6. Consists of. A series resonance circuit is formed by setting the total line length from the resistor 4 to the pattern 5 located at the tip in the stub 3 to a length that resonates at a predetermined desired frequency, and the Q value of the series resonance circuit is formed. By arranging the wire 6 and the pattern 5 so that the value becomes large, the concave amplitude frequency characteristic in the amplitude frequency characteristic compensation circuit 10 is set to a steep characteristic. [Selection diagram] Fig. 6