What Is The Dependence Of Device Capacitance (C) On Applied Reverse Bias (V) For An Abrupt Junction Varactor Diode?

For an abrupt junction varactor diode, the device capacitance (C) inversely depends on the applied reverse bias voltage (V). As the reverse bias increases, the depletion region widens, leading to a decrease in capacitance. The relationship can be approximated by the equation ( C \propto V^{-1/2} ), indicating that capacitance decreases as the square root of the increase in reverse bias voltage. Thus, higher reverse bias results in lower device capacitance.