Wide tunable polyphase filter with variable resistor and variable capacitor

Disclosed is a wideband polyphase filter using variable resistors and variable capacitors for correcting a phase and a frequency to be suitable for wideband communication. There is provided a wideband polyphase filter including: a variable resistor in which resistance varies; and a variable capacitor in which capacitance varies, wherein the variable resistor and the variable capacitor correct a wideband frequency and a phase, converts a predetermined differential input into a quadrature signal and outputs the converted quadrature signal. A wideband polyphase filter which varies resistance and capacitance to correct a phase and frequency, and also may obtain a wideband frequency range may be provided.