ฝัง
- เผยแพร่เมื่อ 1 พ.ค. 2024
- This is the second video in a new 5 part series where I will show you how to build and program your own radar. At the end, we'll use it to locate a small drone. In this video, we'll explore the fundamentals of pulsed radar, and then continuous wave (CW) radar. We'll conclude with a demonstration and examination of the Python program to implement this.
0:00 -- Hardware Selection
2:44 -- Pulsed Radar
5:18 -- Range Resolution
7:52 -- Continuous Wave (CW) Radar
10:22 -- CW Radar Demonstration
11:12 -- CW Radar Software
18:18 -- Conclusion
Here are the links used in this video:
Technical Support Questions on any of these products from Analog Devices should go here:
ez.analog.com/adieducation/un...
Phaser: wiki.analog.com/phaser
Radar Software: github.com/jonkraft/PhaserRad...
TH-cam Playlist: • Build Your Own Radar
MIT Lincoln Labs Coffee Can Radar:
ocw.mit.edu/courses/res-ll-00...
Luigi Cruz's CW Radar Video:
• Software Defined Radar...
Pluto and PYSDR-IIO getting started:
• Enable Dual Receive an... - วิทยาศาสตร์และเทคโนโลยี
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.
So glad we got part 2 already!! Keep up the good work
Jon : respect.
Clear presentation, good speaking style, a really "proper" AE 🎯
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
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.
Back when I was involved with microwaves, we called the rat races.
incredible content Jon, thanks for sharing your knowledge
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.
This is super cool! Saving up to get the hardware and build it myself!
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.
Thanks Jon. This is great stuff!
Dude your videos are awesome, some of the stuff is over my head but you do a great job explaining some really complex things.
Thanks, Jon 👍
Awesome, thanks John, super specialist knowledge 👏
Very interesting! Thank you!
Thank you for sharing your wealth of knowledge!
Sweetest course ever thanks
I don't understand it all (yet), but this is super interesting and well explained. Thank you!
Yes! More!
Super. fantastic ~ Jon! 😇
Super cool
Nice video, thanks :)
well i know what im gonna be watching at 3 AM tonight
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.
Legend
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?
Yes, that's a good idea. At the end of the series, I'll post the slides to my github site. Thanks.
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
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?
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.
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.
Came here to say it’s very interesting, hoping to follow along as I acquire hardware for this. 😊
Can you show us how ground penetrating radar works?
Was all that code developed manually without a GNU radio companion (GRC)?
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!
He can even just overlay another image over those spots for those camera angles that have portraits.
😊
Can this platform be used to track ground objects, or is there something very specific to identifying drone radar signatures?
In the beginning, he shows a demo of it tracking cars and bikes, so probably.
Українці тут? 😎
тут
Fantastic
Useful
Cool
Knowledgeable
Really
Useful
Simple
Systematic
Idealistic
Awesome
Good day Jon! Didn't you think of creating some Discord channel for community build up/thoughts sharing?:) or any other platform
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.
Yeah, a discord channel for this would be great.
@@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.
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.. 🤔
How do you cancel your own transmission while receiving at the same time?
According to matlab Pt in Radar Equation is peak transmit power.
I believe they also factor in pulse width, so then peak power makes sense for their version of the equation.
@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..
My understanding is that instead of SDR we can use some GHz signal generator for transmitting and some ADC for receiving. Is that correct?
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.
Yes, you could disconnect Pluto and use a separate ADC and signal generator.
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.
@@jonkraft Thank you for the replies, that really helps to understand the topic!
Don't you have to use any correction factors?
Please get a better microphone. You sound like helicopter pilot
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: th-cam.com/video/gYYQk6z8bWg/w-d-xo.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.
The audio quality on the unlisted video is definitely better 👌 I'd go with that
Sorry, I didn't see your comment and someone else replied.