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Homemade 6 GHz pulse compression radar

hforsten.com

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Re: Homemade 6 GHz pulse compression radar

#31

Post by Symmetry »

spitfire wrote: post #12
throwup238 wrote: post #2

This is great. It’s the last piece I needed for my suburban missile guidance system! This will be the last year the Joneses survive the annual block party. Can you do phased array radars next? I need the extra precision. There’s a few neighbors who don’t clean up after their dogs…

These should help. Tactical and Strategic Missile Guidance, Seventh Edition https://www.amazon.com/Tactical-Strategic-Missile-Guidance-S... Tactical missile warheads https://www.amazon.com/Tactical-Warheads-Progress-Astronauti...

I'm sure the OP has already read his Skolnik given his comment but for those following along that's usually the best place to start.

https://www.amazon.com/Radar-Handbook-Third-Merrill-Skolnik/...

Re: Homemade 6 GHz pulse compression radar

#32

Post by jcims »

throwup238 wrote: post #2

This is great. It’s the last piece I needed for my suburban missile guidance system! This will be the last year the Joneses survive the annual block party. Can you do phased array radars next? I need the extra precision. There’s a few neighbors who don’t clean up after their dogs…

If someone can figure out how to hack the starlink dish frontend we'll have a hell of a capability to tinker with.

Re: Homemade 6 GHz pulse compression radar

#33

Post by jcims »

I remember this article from the same site a while back - https://hforsten.com/heartbeat-detection-with-radar.html

I bought some cheap 10ghz and 24ghz dopper radar units off of amazon and started tinkering with them. You can absolutely pick up heartbeats and breathing just visually in the spectrogram.

Here's a few samples from that era:

10ghz pointed at ceiling fan:

https://www.youtube.com/watch?v=tIiFvByf1CQ

10ghz pointed straight up underneath a quarter that I flipped and allowed to land on the surface

https://www.youtube.com/watch?v=8riretP8ylE

10ghz pointed at a quarter spin on the surface

https://www.youtube.com/watch?v=5lnYvJoxRak

The comb filtering of the signal from the spinning surface is really cool.

10ghz module on amazon - https://www.amazon.com/HiLetgo-Microwave-Detector-Wireless-1...

Re: Homemade 6 GHz pulse compression radar

#34

Post by throwup238 »

CobaltFire wrote: post #30
throwup238 wrote: post #10

Earlier quoted context omitted.

Thank you for the link! I totally forgot about kraken. I cloned their repo in November 2022, probably in anticipation of the ITAR hiccup. Hopefully the radar code is there.

I’d be interested in knowing if you’ve got that. I was going to buy one but the pull of the code put that on ice. I may pull the trigger if I can get the code!

No sadly it looks like I got the wrong repo or I cloned it too early. It includes a little Python code but no firmware from what I can tell.

Re: Homemade 6 GHz pulse compression radar

#35

Post by throwway120385 »

auspiv wrote: post #15

Incredible work. Crazy that this could be done by a single person. Stick it on a rotating pedestal and you've got a planar radar detector. Add some tilt and then it's not much different than aircraft/weather radar I suppose. The cost (in $LOCAL_CURRENCY, or $570 according to another comment) isn't great but I can only imagine how many hours this took. Given a proper budget, the sky is the limit. Anyone know how .mil…

Wouldn't the FAA or FCC in the US have some jurisdiction over such a setup?

Re: Homemade 6 GHz pulse compression radar

#37

Post by maestroia »

throwway120385 wrote: post #35
auspiv wrote: post #15

Incredible work. Crazy that this could be done by a single person. Stick it on a rotating pedestal and you've got a planar radar detector. Add some tilt and then it's not much different than aircraft/weather radar I suppose. The cost (in $LOCAL_CURRENCY, or $570 according to another comment) isn't great but I can only imagine how many hours this took. Given a proper budget, the sky is the limit. Anyone know how .mil…

Wouldn't the FAA or FCC in the US have some jurisdiction over such a setup?

The "6 GHz" band is an unlicensed frequency for very-low power (VLP) devices in the US.

Specific bands are: "U–NII–5 (5.925–6.425 MHz) and U–NII–7 (6.525–6.875 MHz)".

VLP is defined as those devices which "operate at up to −5 dBm/MHz power spectral density (PSD) and 14 dBm EIRP".

https://www.federalregister.gov/documents/2024/01/08/2023-28....

Re: Homemade 6 GHz pulse compression radar

#38

Post by georgeburdell »

davekeck wrote: post #5
georgeburdell wrote: post #4

I just want to know how much this cost

> Cost was 330 USD for PCB manufacturing and assembly of two PCBs and additional 225 EUR (240 USD) for components from Digikey that I soldered myself. This is including 24% VAT and shipping costs.

Plus the test and validation equipment which are $$$

Re: Homemade 6 GHz pulse compression radar

#39

Post by spitfire »

Symmetry wrote: post #31
spitfire wrote: post #12

Earlier quoted context omitted.

These should help. Tactical and Strategic Missile Guidance, Seventh Edition https://www.amazon.com/Tactical-Strategic-Missile-Guidance-S... Tactical missile warheads https://www.amazon.com/Tactical-Warheads-Progress-Astronauti...

I'm sure the OP has already read his Skolnik given his comment but for those following along that's usually the best place to start. https://www.amazon.com/Radar-Handbook-Third-Merrill-Skolnik/...

There's also Fundamentals of Astrodynamics https://www.amazon.com/Fundamentals-Astrodynamics-Second-Dov...

Which builds up from first principles a ballistic missile defence system. Always useful to have.

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