But how exactly do the voltage and current propagate through transmission lines?

Рет қаралды 49,393

Күн бұрын

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source code : github.com/TheSiGuy/-videos
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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

Пікірлер: 68

@AJ.Ferguson Жыл бұрын

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°?

@TheSiGuyEN Жыл бұрын

yes! you are right thank you

@alyasker2194 Жыл бұрын

you sir are amazing , a half semester of my professor trying to explain this and you swept every thing in 15 minutes. Brilliant!

@DeezNutz-ce5se Жыл бұрын

What are you studying where they cover this?

@alyasker2194 Жыл бұрын

@@DeezNutz-ce5se communication systems engineering

@uromastix87 Жыл бұрын

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

@alexfwfwfw4830 Жыл бұрын

One of the best videos I have seen about transmission lines. My congratulations!

@aieousavren Жыл бұрын

Wowwwww! Very excellent video!!! Beautiful animations, clear exposition, enlightening concept. Great job and thank you for your hard work! ❤

@systemmatrixa2702 2 ай бұрын

This channel is pure gold. Would love to hear more about power electronics or energy engineering from you :) ❤

@rrb6544 Жыл бұрын

The graphs in these videos are awesome. I love it!

@rishi5670 10 ай бұрын

3D visualization of these theories is so rare and you're doing a great job sir. Thank you for your videos.

@geometry_manim Жыл бұрын

These animations are perfect! Thank you for a new video

@AmitKumar-xw5gp Жыл бұрын

Brilliant explanation and animations are great as always..

@alinezhadi Жыл бұрын

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.

@achimbuchweisel2736 Жыл бұрын

Good Job! Outstanding educational content!

@luphiax4239 Ай бұрын

from an electronic engineer perspective this is absolute genious

@user-dt1zg5qh7r 10 ай бұрын

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.

@Edgarbopp Жыл бұрын

Your content is amazing!!

@shakedmani6899 9 ай бұрын

Great work man. appreciated!

@paulboro5278 Жыл бұрын

Please continue this playlist.

@TheFarmacySeedsNetwork Жыл бұрын

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!

@DivinoFiatella Жыл бұрын

Meraviglioso. Cheers from italy!

@AJ-et3vf Жыл бұрын

Great video. Thank you

@damiangames1204 2 ай бұрын

Fantastic animations

@haniamritdas4725 Жыл бұрын

Brilliant! Thank you

@kabandajamir9844 Жыл бұрын

The world's best teacher thanks sir

@rakeshbhadreshwara8077 9 ай бұрын

Awesome Sir with 3D 👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍🥲👍👍👍

@Wander4P 8 ай бұрын

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.

@TheSiGuyEN 8 ай бұрын

Yes, You are right :)

@anujnayak533 7 ай бұрын

Brilliant!

@ycombinator765 Жыл бұрын

I LOVE THIS

@dreamer4171 Жыл бұрын

YOU BRILLIANT!!!

@NunoLima10 Жыл бұрын

This video is amazing

@turkiyem9465 Жыл бұрын

Thank you very much.

@ericadipalma7518 Ай бұрын

Grazie! ❤️

@jonathanrabe3727 Жыл бұрын

You have a new top fan! Do you have a patreon?

@TheSiGuyEN Жыл бұрын

Yup

@lnz597 11 ай бұрын

amazing

@DC4477north Жыл бұрын

Thank you

@nareshkumar4207 Жыл бұрын

Please also do a video for waveguide propagation too.

@fly7188 Жыл бұрын

I love thinking about math in the context of physics, it really helps

@mquinteros Жыл бұрын

Excellent video. Which program do you use for the animations?

@TheSiGuyEN Жыл бұрын

please read the description

@mquinteros Жыл бұрын

@@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

@very-mean-spirited-lizard Жыл бұрын

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?

@TheSiGuyEN Жыл бұрын

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

@ndenjoyment6591 2 ай бұрын

Just a dumb question - why we took I is 180 deg shifted from V

@cdes68 Жыл бұрын

It's aligned in a flux then condensed into a conduit.

@karielf8947 11 ай бұрын

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

@TheSiGuyEN 11 ай бұрын

kzfaq.info/get/bejne/naeop5qJpp3cZnU.html look at this from 2:50 to 4:30

@TheSiGuyEN 11 ай бұрын

kzfaq.info/get/bejne/obFioayrlbiclXU.html and this from 00:00 to 0:45

@SravanKumar-jt1ot Жыл бұрын

Where have you gone a decade ago 😫

@WalterKiefer Жыл бұрын

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?

@dovhanimakhado2434 Жыл бұрын

There is virtual no way you to get rid of the characteristic impedance of a transmission line.

@keylanoslokj1806 5 ай бұрын

Why did you stop posting mate. ❤❤❤

@bartolomiuschristoffel8108 Жыл бұрын

Admin, do u have code for this video?

@luphiax4239 Ай бұрын

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°

@erikeriknorman Жыл бұрын

Maybe

@Drevopol Жыл бұрын

Крутой акцент)

@Poopoopeepee432hz Жыл бұрын

Where’s the attenuation constant?

@TheSiGuyEN Жыл бұрын

so far in this playlist we assume lossless lines. I think it would be better to include losses in a separate video.

@florincoter1988 Жыл бұрын

Voltage does not propagate. It is the measured potential difference between two points. Neither current propagates. It flows. Waves propagate.

@bartolomiuschristoffel8108 Жыл бұрын

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

@bartolomiuschristoffel8108 Жыл бұрын

Did u think this direct current?