What Are Phased Arrays?
Ғылым және технология
This video introduces the concept of phased arrays. An array refers to multiple sensors, arranged in some configuration, that act together to produce a desired sensor pattern. With a phased array, we can electronically steer that pattern without having to physically move the array simply by adjusting the phase of the signals to each individual element.
Commonly, an array is made up of antennas like for wireless communication and radar, but the general concept can be applied to different elements as long as they measure or emit waves. For example, a speaker and microphone array that is used for sonar and acoustic imaging is a type of phased array. In each of these applications, we have to form a beam and we have to be able to move that beam around. And we can do that with phased array systems.
Want to see all of the references in a nice, organized list? Check out this journey on Resourcium: bit.ly/3eHEwZ9
Check out these other links:
- Understanding Radar Principles, Part 1: • FMCW Radar for Autonom...
- Sensor Array Analyzer: bit.ly/3s2ex1t
- Example - Using Antenna Toolbox with Phased Array Systems: bit.ly/3eIAIqr
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Пікірлер: 53
Who is watching this for fun😂
This was an EXCELLENT video! I am an antenna engineer and I wish I had seen this video back in graduate school. I couldn't visualize all the math back then but this video shows so much of the complex math in about 17 minutes. Well done sir.
@meghjitmajumder3468
11 ай бұрын
Hello can I contact you? Actually currently I'm also working on Phased Array Antenna for Beamforming Application.
You’re a good teacher sir.
This was excellent, I am an automotive technician that teaches ADAS operation, diagnostics and calibration. I appreciate this greatly.
Thank you for making such videos! It is very helpful to understand how phased array, or AESA works.
So far the best video about Phased Array Antenna. I wish I could have discovered it earlier. I always struggle to visualize antenna or radar related topics from theory. Thanks a lot for this series of video.
@BrianBDouglas
9 ай бұрын
Thanks for the nice comment!
Love Brian's videos. inspired me to become a controls engineer
wow, what a great video and clear explanation ! Thank you !
Brian! You are so loved by engineers everywhere. Thank you. If you're ever in Boston we'd love to have you come give a talk at our lab!
@BrianBDouglas
9 ай бұрын
Just seeing that! Thanks for the comment and the offer. MathWorks is in Boston so I come out there about twice a year.
Brian video = watch irrespective of the topic/ subject. There will always be somthing to learn.
Great insights, thank you.
This is a great video! I will share this video with my team.
Cool video. Thanks!
very well explained sir. Complex maths explained through Visualization is what a student needs Thank you
It's simply excellent video, thank you so much for making this video!!!
@BrianBDouglas
7 ай бұрын
🤗
Excellent video ☺️
Brian, it would be really nice to move to your house for a few months and talk about control theory all day, every single day. But I have a family and I can't :(
@BrianBDouglas
Жыл бұрын
It’s a deal as long as you help with chores!
@MirusWoozy
Жыл бұрын
@@BrianBDouglas We have a deal! Time to say goodbye to my wife and children. I just need to estimate their reactions and try to control its. I hope I can actuate my plan(t). See you soon Brian!
nice explanation 😀
very cool
I work in IT and learned about beam forming thanks to "newer" wifi tech a number of years ago (I believe Either WiFi N or AC introduced it). Eventually wanted to make an EMP device (as kids are want to do) that was directional, learned a little more about radios and realized I do not have the resources lol ($$$). Not to mention the legal issues, I'm sure the FCC wouldn't take kindly to that. As an adult I've recently regained my interest in radio, less for "dumb teenager stuff" and more for HAM Radio, Medium/short range unlicensed microwave stuff, and now I'm thinking radar might be cool and potentially useful. I wonder if there is a way to combine a HAM license with DIY radar to be allowed to build something "more useful". Say you want to know if someone is flying a drone over your home/property and it's anywhere from a quarter acre to a hundred acre plot. I wonder where the legal limits are, guess I've got some googling to do lol. Then I can decide if learning that black magic is a reasonable use of time as a hobby. Although realistically I'd probably never build it for fear of angering the federal government and it's various unknowable regulations (I'm looking at you FCC).
that is so awesome
12:09 could someone please explain Sinc element pattern?
Which software did you use to create the radiation pattern?
wonderful👍👍👍
@BrianBDouglas
7 ай бұрын
Thanks!
The dark lines is where the signal has a high negative absolute value. The signal is low (near zero) between the white and dark strips.
amazing
Vivid explanation
Well-Communicated & I ate it up with a spoon ;)
2:09 *steering of the beam is done digitally*
@ Brian Douglas, কত দিন পরে এলে গো বন্ধু । 🥰🥰😍😍
does all of this still hold if i'm sampling each element one by one? fast, but never at the same time. i'm thinking it might shift the peak around, but what i'd really like to know is if it would work at all. assuming it would, does trying to compensate for the "missing" samples make it worse? on an 8 channel system, one of them is always 7 samples "behind".does sampling them in a random order help or hurt? large microphone arrays are terribly expensive, i've had "make a crap one and see how bad it is" in my todo list for years but i keep imagining things that would make it not work at the price i need the hack to be in. (the pio in the pico made using digital microphones on a large scale easy, i'd expect them to tap out at like 18 microphones per pico, but i'm just guessing)
@BrianBDouglas
9 ай бұрын
Yep, that time delay would shift the peak around. Here's an audio example that uses time delay to shift the beam: www.mathworks.com/help/phased/ug/acoustic-beamforming-using-a-microphone-array.html#MicrophoneBeamformerExample-3
How can the context of forming a beam and moving the beam around be extended to microphones that are recording sound?
can you elaborate on the difference in an optical phased array?
What kind of amp or work station do i need?
It's often said an isotropic antenna radiates equally poorly in all directions! 🙂
I am a boots on the ground telecom tech, only trained on install/maintenance of the equipment and safety. It sounds like isotropic antenna=omnidirectional antenna?
PESA radar?
What is the complexity of the Hadamard Product of two matrices? Is it O(1)? I NEED TO KNOW!!! IS IT POSSIBLE TO MAKE THE HADAMARD PRODUCT OF TWO MATRICES FASTER!!!
Hello sir, how to provide unequal distance between antenna elements? Like, its not always 0.5 lambda between all the elements?
@BrianBDouglas
6 ай бұрын
In the sensor array analyzer app? If so, then instead of choosing uniform linear array, choose the arbitrary array and set your elements with any spacing.
14:25 ㄷㄷ
@bitluni ..dachte koennte fuer dich interessant sein ;)
Let's say I had 5 to 40 thousand transducers in orbit. What's my capabilities? 😂
Tnx . Now jina and the orks will steal our tec. Lol thats just what they do. Hahahahahahahah
14:25 ㄷㄷ