Hello Everyone,
As some may have seen I have a broken Anritsu SDM module (Topic here:
https://www.eevblog.com/forum/repair/wiltron-anritsu-switched-frequency-doubler-module/ )
This module has a frequency doubler which mutiplies the fundamental 2-20GHz YIG oscillator in the Anritsu machine to give output up to 40GHz.
My question is this:
If I attempt a repair and switch out the diodes, can I in principle use any Schottky diodes with enough power tolerance to repair my unit, or is there something else to it?
I see that Macom has the step-recovery type listed for multipliers and comb generation (possible candidate would be
https://www.macom.com/products/product-detail/MMDB45-B11 ), but my knowledge is lacking in this field.
The original diodes in the SDM device seem to be four diodes in series, anchored in between the middle. The whole thing is a beamlead thing that I have not found anywhere, so its probably custom..
ASCII CAD: ( ->| = diode )
GND - 50R - ->| ->| - Sig ->| ->| - 50R - GND
I have measured the forward voltage drop between the "inside of the 50Ohm resistors to the "Sig" point, and it's 1.2V-isch, indicating two diodes.
Pictures of the SDM unit is in my other topic..
Best regards