On Sun, Sep 22, 2019 at 03:26 AM, <bryburns@...> wrote:
I would think that the current will be even less when we apply ~-10 dBm or 0.1
v pk signals to it. 0.1 v is approximately 35 dB smaller than 6 V.
As I know there is no diode in the world that can protect wide bandwidth RF input with no dynamic range degradation and no IMD distortions. Otherwise it will be used in a wide range of sensitive RF equipment.
Usually low flicker noise high speed Schottky diodes are used for such purpose, for example HSMS2812 or something like that. But they also reduce dynamic range of the signal.
As for voltage suppressors, once I tried 82V voltage suppressor for 10V transmission line, but it has so high IMD distortion, so digital signal completely unreadable.
PS: as for NanoVNA output level, it has peak output about 324 mVpp on 1 MOhm/18 pF load. Such level can open some diodes
