| 摘要 |
A band pass filter for tracking a wideband frequency is provided to improve a characteristic of a stop band and a frequency selectivity of a filter by generating a serial resonance and a parallel resonance. A band pass filter for tracking a wideband frequency includes an inductor unit(100), and a plurality of electrostatic capacitance variable units(110,120,130). The inductor unit(100) has a plurality of inductors which are connected in series. The plurality of electrostatic capacitance variable units(110,120,130) are serially connected to at least one inductor(100) in the inductor unit(100), and generate an electrostatic capacitance. The number of inductors connected to the plurality of electrostatic capacitance variable units(110,120,130) is different from that of the plurality of electrostatic capacitance variable units(110,120,130). One ends of the plurality of electrostatic capacitance variable units(110,120,130) are connected to each other. Each of the plurality of electrostatic capacitance variable units(110,120,130) generates a different electrostatic capacitance value. |
