Clean, crisp, efficient, understandable, and easy to listen to. Great stuff, thank you!

One of the best most pragmatic theory of radar systems presentations I have ever seen. Thank you. Radar still continues to be an amazing and valuable evolving technology innovation despite being invented in 1940

So glad we got part 2 already!! Keep up the good work

Jon : respect. Clear presentation, good speaking style, a really "proper" AE 🎯

Either you are very knowledgeable, used a huge amount of time thinking out the material presented, here or both. This is so well paced and presented making it a pleasure to follow. Thanks for your time and effort.

Dude your videos are awesome, some of the stuff is over my head but you do a great job explaining some really complex things.

Great presentation. Right sized lesson, with clear easy to follow details. Can see how this will build into more advanced topics, and like this approach.

incredible content Jon, thanks for sharing your knowledge

Had an interest in rf since trying to get my head around waveguides etc, and turning radar alarm heads into radios using fm radios as the rx audio section. Great start to the series looking forward to the next.

I don't understand it all (yet), but this is super interesting and well explained. Thank you!

Awesome, thanks John, super specialist knowledge 👏

This is super cool! Saving up to get the hardware and build it myself!

Sweetest course ever thanks

Thanks Jon. This is great stuff!

Thank you for sharing your wealth of knowledge!

The gadget that made police radars practical was the microwave circulator. With that, one antenna could be used to transmit and receive. In WW2 it was common to put a yagi antenna on one wing, and another on the other wing, to provide isolation. Back then UHF FMCW was used for dive-bombing attacks. The ships were large, so the antennas and power were small.

@keithr0

4 ай бұрын

Back when I was involved with microwaves, we called the rat races.

Very interesting! Thank you!

Super. fantastic ~ Jon! 😇

Thanks, Jon 👍

well i know what im gonna be watching at 3 AM tonight

This is great, quickly commenting just two minutes into the video… I dunno what your paranoia levels are but one thing you might consider is removing the family portraits from the frame / background of your videos. Just a thought. Excited for this series. Thanks!

@BouleyMusic

5 ай бұрын

He can even just overlay another image over those spots for those camera angles that have portraits.

@hashassassin830

14 күн бұрын

This dude is obviously a spook, and I bet those pictures aren't real

7:14 from my reading, that copper part looks like a magnetron. Excellent demo. I'd like to hear about Analog Devices frequency counting devices at 9:28.

Yes! More!

Nice video, thanks :)

Super cool

very nice u got my sub

Excellent job Jon!!! I can't wait for the rest of the episodes. Can we have access to the RADAR Analog Devices slides?

@jonkraft

5 ай бұрын

Yes, that's a good idea. At the end of the series, I'll post the slides to my github site. Thanks.

Legend

Fantastic Useful Cool Knowledgeable Really Useful Simple Systematic Idealistic Awesome

Jon, this is a great series, thanks. Two questions: do you have any information on availability of the phaser h/w? I see that it is out of stock on the A/D site. What about licensing to transmit for your end goal of a drone tracking radar?

That's one reason why I suggested Plasma Antenna, since you can emit very high peak power and ultra short pulses unlike normal antennas! Plasma antennas are perfect for pulsed Radar only problem is not many know about them since usage is usually in top secret projects that being said many of us out there that experiment with it would never look back at using any other type of antenna especially if you want to be stealthy and not get in trouble with FCC. Trust me, until you try out one, you won't understand what you're missing on it's a whole new ball game with plasma!!! 😀 oh and btw you don't need a phased array, Plasma Antenna can do everything a phased array does with 360 degree directional capability.

Super

Would it make sense to separate the gui python into its own .py file? Really enjoying the series so far! Thank you for walking through the code line by line. It makes it a lot more clear what’s going on.

Sort of an advanced topic but what about an ISAR to image vehicles on a freeway?

Hi Jon thank you very much for this It is very helpful. Why are you not trying to make a datacube with the recieved signals for further processing or is summing up the two channels more than enough? Also on a sidenote isn't our antenna an 8*4 array shouldn't there be 8 recieve channels? Or is it the number of adar1000's on the board? Its my understanding that we would need the datacube (I am following the Matlab tech talks explanation of fmcw radar) for the cfar algorithm development. Thanks again for this fantastic series much appreciated, I have backordered a phaser from digikey looking forward to building this out.

@jonkraft

5 ай бұрын

Thanks! So I'm building this radar up step-by-step. And we're not quite at datacubes yet! And its not necessary for CFAR. But the fifth video will be all about multi-chirp processing. So it starts with a 2D radar data matrix of slow time and fast time. From that, I can add antenna elements to create the cube. But that would be a follow up video, and only if there's enough interest in phased array beamforming radar. I'll post a poll soon with ideas for future videos, and this will be one of them. Thanks.

@bedel23

5 ай бұрын

Came here to say it’s very interesting, hoping to follow along as I acquire hardware for this. 😊

Thank you for your insightful video and explanations. However, I had a question. I did not realize what is the role of Rasberry in this video?

@jonkraft

11 күн бұрын

Thanks! The Rpi is essentially a USB to SPI converter. So we can program on the computer, and use the Rpi's 40 pin header to send the SPI commands to the Phaser's chips.

Was all that code developed manually without a GNU radio companion (GRC)?

Can this platform be used to track ground objects, or is there something very specific to identifying drone radar signatures?

@paulroberto2286

5 ай бұрын

In the beginning, he shows a demo of it tracking cars and bikes, so probably.

Good day Jon! Didn't you think of creating some Discord channel for community build up/thoughts sharing?:) or any other platform

@jonkraft

5 ай бұрын

That is a good idea, if enough people want that. It could be useful for posting files and troubleshooting various hardware -- and it doesn't have to be the hardware I'm using. I just don't know what's the easiest way to link that to this channel. There used to be a discussion tab on youtube channels, but that's gone now.

@JohnScherer

5 ай бұрын

Yeah, a discord channel for this would be great.

@willking4512

5 ай бұрын

@@jonkraft It is usually done by pinning the discord invitation link in a comment or adding it to the video description. Thanks for a basic intro to a subject I've always been interested in.

Can you show us how ground penetrating radar works?

😊

How do you cancel your own transmission while receiving at the same time?

My understanding is that instead of SDR we can use some GHz signal generator for transmitting and some ADC for receiving. Is that correct?

@konserv

5 ай бұрын

And we don't need a good resolution ADC, because we can mix (somehow) our TX and RX to get a beat frequency (which is in range of KHz) and digitize only that beat frequency.

@jonkraft

5 ай бұрын

Yes, you could disconnect Pluto and use a separate ADC and signal generator.

@jonkraft

5 ай бұрын

The ADC still has to be good though, to digitize the beat frequency return and not introduce spurs, non-linearity, or DC offset. But many other ADCs, other than Pluto, would work.

@konserv

5 ай бұрын

@@jonkraft Thank you for the replies, that really helps to understand the topic!

Українці тут? 😎

@btsmartx

5 ай бұрын

тут

Don't you have to use any correction factors?

If I aim to design anti-radar drone there seems much more easier to spot CW then pulse one. My mind slowly drifted in direction of IR lidar.. 🤔

According to matlab Pt in Radar Equation is peak transmit power.

@jonkraft

5 ай бұрын

I believe they also factor in pulse width, so then peak power makes sense for their version of the equation.

@mrlazda

5 ай бұрын

@jonkraft No, there is no pulse with their equation (it is the same as one you wrote) , but it make sense. The radar equation gives you recived power (reflected power), which does not change with puls width. Received energy is dependent on pulse width frequency of pulsed and power..

Those are some expensive pringles

Please get a better microphone. You sound like helicopter pilot

@jonkraft

5 ай бұрын

Ha, fair enough! I can't hear the issue. But I've uploaded an alternate mix of audio that I think might help. Could you take a listen and let me know if if sounds better. It's an unlisted video link here: kzread.info/dash/bejne/mY2Ns81vqpvIh8o.html Anyone else that is having trouble with the audio of this video can also try that link -- and then leave me feedback on that video about the audio quality. Thanks.

@hornryan22

5 ай бұрын

The audio quality on the unlisted video is definitely better 👌 I'd go with that

@therecon448

4 ай бұрын

Sorry, I didn't see your comment and someone else replied.