The time necessary to sweep the stored charge from the diode junction is its reverse Restoration time, and it is pretty long in the PIN diode. For the presented semiconductor materials, on-point out impedance, and least usable RF frequency, the reverse recovery time is fixed. This residence can be exploited; https://coaxialswitch48024.blogofchange.com/37189407/considerations-to-know-about-pin-diode-switch