Agree with webdog. Simple design: Single conversion with high side LO and moderately high 200MHz IF and B=20MHz LC filter will preserve pulse timing and low risk of images at those frequencies. Use a log detector at IF (~200MHz) to get dynamic range. Use antenna matching to provide some preselection for image rejection.
At first was thinking about using I/Q demodulator, then rectangular to polar conversion to obtain amplitude of signal. (this eliminates non zero beat tone if only using direct conversion with sine OR cosine). All digital is probably overkill but as you say there may be chips out there that do it nowadays, I don't know. Hittite part is pretty expensive. Maybe there is an analog SSB demodulator that does the job for IFF pulse processing.
Yeah I know. I kind of did the same thing. except of I didn't think of images. I'm not a pro. could you explain about images in such simple system and how to reduce it. plus how it is related ro preserve pulse timing and other parameters? cause I think I'm not giving a great pulse after Log Detector (Fall Time is high).
plus I think the level of noise at the output pulse is a little high. and thats gonna decrease sensitivity of system to around -85dBm (detectable by Pulse Analyzer System as a pulse) .
I'm not sure but I think the problem is in the Log Detector stage. Is there a betther log detector than AD8310 Log Detector ?
(IF is 160MHz if it's related)
Finally what do you mean by "Maybe there is an analog SSB demodulator that does the job for IFF pulse processing" ?