But how exactly do the voltage and current propagate through transmission lines?
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- Опубліковано 25 чер 2024
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Here I explain by animation how exactly the voltage and current propagate through the transmission line, How reflections affect the signal transmission, The concept of standing wave ratio and motivate the viewer to smith chart.
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These animations are made using manim. A community-maintained Python library originally created by grant sanderson (3blue1brown) for creating mathematical animations.
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commons.wikimedia.org/wiki/Fi...
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0:00 Introduction
1:40 voltage and current waves
2:09 what is complex exponential function (the forward and backward waves)
2:48 the standing wave pattern (the first perspective)
4:18 the standing wave pattern (the second perspective)
6:29 the standing wave pattern (the third perspective)
7:39 the standing wave pattern (the fourth perspective)
9:17 the matched load: standing wave ratio (swr) of one
10:08 unmatched load: standing wave ratio (swr) between one and infinity
10 :45 full reflection of the wave infinite standing wave ratio (swr)
11:12 impedance transformation and smith chart
14:23 transmission line delays the signal and my change the amplitude periodically while propagating if the load isn't matched
8:42 is that the right minus sign? Or is it the one to the left of the gamma that represents a phase shift by 180°?
yes! you are right
thank you
you sir are amazing , a half semester of my professor trying to explain this and you swept every thing in 15 minutes. Brilliant!
What are you studying where they cover this?
@@DeezNutz-ce5se communication systems engineering
I've been looking for a good explanation on impedance matching cause I never really got it in my fields course. This video has amazing visualizations and explanations. Thank you so much
One of the best videos I have seen about transmission lines. My congratulations!
This channel is pure gold. Would love to hear more about power electronics or energy engineering from you :) ❤
Wowwwww! Very excellent video!!!
Beautiful animations, clear exposition, enlightening concept. Great job and thank you for your hard work! ❤
from an electronic engineer perspective this is absolute genious
3D visualization of these theories is so rare and you're doing a great job sir. Thank you for your videos.
The graphs in these videos are awesome. I love it!
These animations are perfect! Thank you for a new video
Brilliant explanation and animations are great as always..
Giving some practical examples using capacitors or ... would make this video more understandable for other students with different background who are interested in this topic.
Great 4-D video showing the often ignored time and especially the imaginary part! Someone already pointed out the wrong highlighted negative sign by Gamma. The voltage/current amplitude triangular chart also is slightly wrong. Gamma is the same for both voltage and current (there should only be one circle for showing 1 + Gamma and 1 - Gamma), but the voltage/current amplitudes have different prefactors (by a factor of z_0) which scale the whole term in parentheses. If just showing 1 +/- Gamma, there is one circle and a clear way to see the standing wave ratio.
Awesome Sir with 3D 👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍🥲👍👍👍
Good Job! Outstanding educational content!
Fantastic animations
Your content is amazing!!
Great work man. appreciated!
Yes! This is AWESOME information! Ham radio operator and HUGE interest in radio here. This is the best explanation I have ever seen of this. I learned so much seeing this video! Thank you! Subbed and belled!
Great video. Thank you
Meraviglioso. Cheers from italy!
YOU BRILLIANT!!!
Brilliant! Thank you
Please continue this playlist.
I think there's a mistake at @8:45. That minus sign is the same for both current and voltage. I think it's the sign in front of Gamma which rotates the vector 180 degrees.
Yes, You are right :)
I LOVE THIS
Brilliant!
This video is amazing
The world's best teacher thanks sir
Thank you very much.
You have a new top fan!
Do you have a patreon?
Yup
Grazie! ❤️
amazing
Thank you
Please also do a video for waveguide propagation too.
Excellent video. Which program do you use for the animations?
please read the description
@@TheSiGuyEN thank you so much! I tried to check the code on git hub link on the description but it says error cannot be found the git repo
I love thinking about math in the context of physics, it really helps
Just a dumb question - why we took I is 180 deg shifted from V
I have to deal with real world transmission lines.
However, my transmission line is much shorter than the wavelength of my generator signal (it is in the kHz range). I just cannot comprehend how standing waves will form in it. Do we need more complicated math for this case? Does your visual explanation still apply analogously?
I think the answer is in the first video of my transmission lines playlist.
notice that the standing wave pattern repeats each half wavelength of the signal. So if the wavelength is too large compared to the line, there's no standing wave and you can treat the line as a simple wire in circuit theory (super conductive wire with infinitely small dimensions). as a rule of thumb you can use the lumped element model if the line is less than (1/20)*wavelength. Hope that help
why at 7:16 you say that the current is 180° out of phase if in the graph on the top left corner they are out of phase of 90°
It's aligned in a flux then condensed into a conduit.
Wouldn't the power company use a capacitor/inductor to fix the signal coming back so that the impedance of the reflected signal is purely real?
There is virtual no way you to get rid of the characteristic impedance of a transmission line.
Why did you stop posting mate. ❤❤❤
Where have you gone a decade ago 😫
Admin, do u have code for this video?
Certainly excellent job done on this video, this kind of video is good for VERY intelligent poeple? but I think that not every one could understand, personnaly I did not understang it all, specialy 3D diagrams. The simplier the better
ua-cam.com/video/gAxt7XA7x6A/v-deo.html
look at this from 2:50 to 4:30
ua-cam.com/video/kK2nIz0R8eA/v-deo.html
and this from 00:00 to 0:45
Maybe
Крутой акцент)
Where’s the attenuation constant?
so far in this playlist we assume lossless lines. I think it would be better to include losses in a separate video.
Voltage does not propagate. It is the measured potential difference between two points. Neither current propagates. It flows. Waves propagate.
Bro do know u alternating current, electric field and capacitance on long transmission line? If u dont know check out him video about transmission line
Did u think this direct current?
My professor is cool but god damn I cannot follow him or read his cursive handwritten slides
Your GitHub link doesn't seem to work?
Please also do a video for waveguide propagation too.