Radar generating transistor circuit?

The idea was broadband impulse radar, using step-recovery diode pulsers and some sort of audio-IF-range receive mixer. The guy was McKeon or something like that. He has a bunch of patents, and started his own company, but it didn't seem to go.

McEwan?

Jeroen Belleman

g transistors which generated "radar wavelength" signals. Then, as events g o, a Georgia Tech Prof. raised a stink since he had previously developed th ose applications. Again, a vague memory. Does anyone recall this?

Do you want to know about the radar circuits or the tiff between a bunch of nobodies at overfunded cesspool bureaucracies???

Yes. Tom McEwan

On one of my downloading sprees, I got various radar circuit schematics with a smattering of transistor types and vintage stuff dating back to WW2.

A prominent book on the site I think they might have come from is: gunplexer cookbook, if you search that you might find a site with all kinds of UHF/EHF military stuff.

If you're doing really low power stuff, the ZTX415 avalanche transistor might do for producing narrow pulses - you go for a Vcc of 60V or more, your energy storage device is a tuned length of co-ax cable, you set the transistor up just short of breakdown and trigger it with a pulse to the base. Pulsewidths of a few nS are a typical application.

How do you focus the energy? A dish is broadband, but the feed horn generally is a band limited device.

Your receiver would be broadband too, so this seems like a great way to get jammed.

Tiff! Tiff!

hing transistors which generated "radar wavelength" signals. Then, as event s go, a Georgia Tech Prof. raised a stink since he had previously developed those applications. Again, a vague memory. Does anyone recall this?

of nobodies at overfunded cesspool bureaucracies???

This individual actually makes UWB products:

Depends on the application but increased signal processing power ( and other advances) has enabled real time synthetic wideband.

ng transistors which generated "radar wavelength" signals. Then, as events go, a Georgia Tech Prof. raised a stink since he had previously developed t hose applications. Again, a vague memory. Does anyone recall this?

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I am curious, what do the police traffic radars use ? They cannot be very heavy or require very heavy-duty power supplies.

ing transistors which generated "radar wavelength" signals. Then, as events go, a Georgia Tech Prof. raised a stink since he had previously developed those applications. Again, a vague memory. Does anyone recall this?

of nobodies at overfunded cesspool bureaucracies???

This is a classic description of a lot of the academic old geezer profs, and their isolated, cut-off-from- reality work environment.

Address Not Found

Works for me.

Gunn-diode CW doppler, or lately rangefinder lasers.

ing transistors which generated "radar wavelength" signals. Then, as events go, a Georgia Tech Prof. raised a stink since he had previously developed those applications. Again, a vague memory. Does anyone recall this?

of nobodies at overfunded cesspool bureaucracies???

the former, I think. :) jb

Didn't used to be so portable - years ago I zinged past a collection of coppers assembling various cables into a floor standing box about 1 1/2' cube.

It was the first morning at the end of daylight saving, there was freezing rain and I was doing about 70. Further up the road I found myself gaining on a sports car that seemed to be in difficulty, from a good distance back I eased off the throttle but didn't touch the brakes. Suddenly the car just spun - a cyclist coming the other way ended up in someone's front garden.

No idea - I only read little bits I can find about radar out of idle curiosity.

Its my understanding so far, that waveguides can be tuned pretty sharp.

You're probably thinking about cavity resonators. Waveguides are transmission lines, and they are not supposed to resonate.