Multi-application PIN diode

In this paper, a multi-application PIN diode is presented. The PIN diode structure is similar to conventional PIN diodes, but only difference is that a layer is used in the middle of layers. The diode has 4 pins. Proportional to the applied voltage to the two control pins, it can be achieved a value arbitrary of series capacitance and resistance. This feature of the PIN diode can be used a good way in the resonators, amplifiers and high frequency multiplier, modulator and demodulators circuits. And also by using these elements rather than complex circuits in telecommunication systems, the circuit size and number of elements are reduced.