Fun with gunnplexer's

[TheSteve]

Picked up a pair of Macom Gunnplexer transceivers the other day.
Today was the first power on to verify they are working.
Next is to FM modulate the supply to transmit tones/audio.
After that is is receiver time.
Eventually the plan is to have a pair of limited range, very directional 24 GHz walkie talkies - just cause I can!

I will update this thread with progress as I go.

[babysitter]

Used simiilar ones together with people from my makerspace to do a model speed enforcement car. Complete with flashing LED in case you're over the threshold and external display. (Converted a pink VW Bus from Dickie to a black and white one, hehe...)

[TheSteve]

Finally had a chance to build a quick and dirty 5 volt regulator with a LM317. Audio is fed in to its adjust pin via a 0.1 uF capacitor. The output of the regulator is fed directly into the gunnplexer. With 4 mV of audio I am getting roughly 100 kHz of FM deviation @ 24.13 GHz. The audio demodulates quite nicely but there is a lot of frequency drift. When a receiver is built it will need to have a wide front end.