Applications Of PIN Diodes

The most important property of the PIN diode is the fact that it can, under certain circumstances, behave as an almost pure resistance at RF frequencies, with a resistance value that can be varied over a range of approximately 1 Ω to 10 KΩ through the use of a DC or low frequency control current. This article describes the important properties of the PIN diode and illustrates how it can be applied in a variety of RF control circuits.