TDT02: Transmission Line Equations

[@wussup331]

I watched these videos during my undergrad and still return to them after a PhD and working as an RF engineer. Simply awesome!

[@MrInventer80]

where did you do your bachelors/masters just out of curiosity? I'm soon finishing my undergrad in EE and would like to specialize in RF.

[@wussup331]

@@MrInventer80 In the UK. Undergrad in electronics at Loughborough & PhD at University of Glasgow. If you want to do anything in a PhD make sure its out of passion because its tough going and try to assess how it will help your career - whether you see your future in academia or industry. Be very careful, its not about who will accept you but more where is best for you and where you want to be post education. Supervisor "selection" is very important. Others may say different but that's my advice based on my experience with the process :) best of luck to you!

[@wussup331]

I will say this, at least in the UK RF expertise is a rarity and there is a shortage of talent. If you do a PhD, strive to have a solid understanding of the fundamentals. Again, my two cents :)

[@igorbecker6192]

The world needs more professors like this

[@robispurple]

You sir, Greg Durgin, are a hero! My professor simply derived all this on our first day of class with no explanation of what all the different variables and constants were. Leaving the entire class just baffled and lost. I now have some ground to stand on and can ask the appropriate questions. God Bless.

[@chanwilliamyk1]

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[@pawezielonka7662]

It's amazing, you can explain expotential series with base of 0.5 if you take students perseverance as an example: TDT01 - 203 394 views, TDT02 - 94 311views, TDT03 - 43 274 views, TDT04 - 20 648 views, TDT05 - 9 040 views.

[@jacobvandijk6525]

This is typical for almost any course.

[@1macueliso]

This man is incredible he makes this class interesting and easy to understand. Quite an outstanding teacher.

[@1996dgl]

This is so helpful. Thank you for making these lectures available to the public

[@ibrahimkayikci2146]

"If you can't explain a subject in a simple way, it means you still don't fully understand it" - Einstein

[@felixqi6659]

It's so good that you shared those videos with us , which really help me a lot

[@RoyAndrada]

I was also asking myself about that two Zs, although asked a bit late and got Dr Durgin a little spooked, i have to thank Bill at 16:33 for asking that question. Aside from that, this lecturer really makes EM very interesting. Thanks and congratulations professor.

[@fep265]

Dr.Durgin you have made my Signals Transmission course an enjoyable course. Thank you so much for posting such awesome videos.

[@jinglebell471]

Thanks for sharing your lecture with us! It really help with my self-learning.

[@mountainmanws]

I am working with technicians taking the transmission line semester at a local college. I directed them to buy Transient Signals on Transmission Lines and to view all these videos. Superb teaching.

[@yahya1badawi1]

Dr. Durgin, frankly, ur likes make that world better, now, transmission lines is like a piece of cake at least for me, thanks and i hope u keep up the good work, many thanks for sharing ur brilliant experience and btw u've a nice presentation skills :)

[@nilotpalbose1438]

Thank you so much dear professor. I had a lot of confusions about TL theory. But after watching the video, my understanding is clear I believe.

[@MrKKChina]

Dr. Durgin, I love the way you are teaching, Thanks.

[@runeinglev2782]

Teaching Level: It's over NINE THOUSAND !!!!!!!

[@dalygav]

I like the passion . it really shines through and you can tell you love what you do. you are very much in your element. RF was one of my favorite subjects in school.bring on the Smith charts!

[@cowpacino]

These lectures are going to save my ass this quarter! Great job!

[@angelobruch]

You are a hero, thanks from Brazil

[@FranVarVar]

Someone correct me if I am wrong but on 43:05 Greg says that controlling the geometry of the material (coaxial cable) one can design for a target velocity of propagation and a target impedance. I think that is true only for the intrinsic impedance but not for the velocity of propagation. Greg said a little earlier that the geometry cancel out when calculating the velocity. So the only way of design for a target velocity of propagation would be to play with the permitivity and permeability of the dialectric. I am right?

[@0sk4rb]

In the lossless case, the propagation speed will only depend on the permittivity and permeability (whereas the relative permeability in a dielectric is approximately equal to one).

[@chehar]

Greg Durgin, you are the man.

[@andywander]

Man, where were you when I was studying EE? Thanks!

[@wty1992]

12:35 can anyone explain intuitively why is there a negative sign?

[@chats-bug]

It represents the direction of the current.

[@nikshepbangera5416]

does he do the derivations of the equations at 2:46 i dint see it in the first part of the video

[@ozzyfromspace]

he'll do them in future lectures

[@Marva123]

This lesson was explained in easy to understand terms compared to my obtuse class in EMAG 1 at my school.

[@Raphael_NYC]

Thank you Dr. D. Wonderful, generous, interesting. raphael santore

[@prekshaa96]

awesome lecture sir

[@ozzyfromspace]

I didn't realize I needed the story at 30:00 until I heard it 😂🙌🏽🕺🏽🔥

[@mattdistad]

I think I'll email my teacher and tell him to act more like this guy

[@youcefyahiaoui1465]

It seems like there needs to be 1/(2pi) left out in the last formula for microstrip Zo when a>b.

[@mhmodsaid1022]

Thanks, Thanks, Thanks, Thanks, Thanks, Thanks forever 💙💙

[@jacobvandijk6525]

@ 17:32 It is only lossless because he assumes that R = G = 0. Why he does not tell this I don't know.

[@zz9758]

Thanks! Doctor. Could you tell us what book you are using?

[@zonghengpu2235]

wish i could go to GT for my graduate school, thanks a lot

[@andreahudson3496]

Is this for lossless lines?

[@sonychayadi7754]

I see so is there any influence with the impedance directly?

[@Dhoyos7]

So in theory you could tap into the coaxial cable by placing a probe between the center wire and the outer shell.. Cant imagine it would be easy but it should work...

[@danseluk5193]

Excellent!

[@abuabdullah9878]

Thank you so much.

[@gauravpoudel7288]

16:44 Is that guy in the class?

[@PauloConstantino167]

Greg, is voltage actually charge travelling or is it electric fields?

[@nejcdezelak6358]

Voltage is a property of an electric field (it is equal to the energy that could be transmitted to a point charge if it would travel from point A to point B in the electric field). Electric fields on the other hand are caused by electric charges. So both things are interconnected.

[@Mr.M1STER]

Lecturer: "Oh it's so beautiful isn't it" Class: *complete silence*

[@cmuller1441]

The only point I don't like is using z as position variable. That could confuse people with zo (impedance)

[@sonychayadi7754]

my lecturer ask me to learn the transmission line by myself, and i find this video! Thx u sir! I really appreciate this video! xD but I have a question, how about the thickness of the transmission line? Is there any influence?

[@NBSuperb]

Is this distributive analysis or lumped?

[@jacobvandijk6525]

Listen here: 39:46

[@tag_of_frank]

Where can I find homework questions and answers?

[@MarcelloZucchi91]

Look here www.propagation.gatech.edu/ECE3025/index.html

[@fiapop]

Thickness of the medium has effect on amount of current it can carry.

[@noahballou6350]

i wish i was a Super-Cool 7th-Level Wavemaster like Professor Durgin

[@GabiMartin97]

Thank you!

[@austinmw89]

Why can't you be my EM teacher ;(

[@tellmebaby183]

u are awesome man

[@ashrefd]

Thanks

[@tristandeppe5215]

42:01 and 55:20 Maryland accent!

[@MrSomeSkeptic]

38:51 Cough, touch cable with hand you coughed in, pass around the cable. :) Nice lecture so he gets away with it.

[@diansong1394]

and particularly disturbing after going through 2020

[@carcheta21]

this guy is a f%^& beast!

[@YJake7]

Oh how I got lost so quickly. Not your fault, I'm just only 15, guess I better go learn calculus

[@DavidHinkes]

Smoke -> Fire, V -> I

[@ArpitChoudhary16]

Hello sir, I need your urgent help. Can you please solve a couple of questions of Transmission Lines, for me in which i am facing difficulty? It would be very helpful, Sir. Will really appreciate your help and support. Thanks & Regards, Arpit

[@pythonanimalia]

post your question please

[@ArpitChoudhary16]

python animalia Can I please have your email address? Accordingly, I can email you the questions. Thanks.

[@pythonanimalia]

I would suggest you to put up your question in the comment section itself so that everybody gets chance to answer. m no pro in transmission lines.but still here it is :)[e-mail].

[@ArpitChoudhary16]

python animalia Thank you for your reply. Actually, it's a pdf file (and I can convert it to jpeg, doc, etc.) so cant upload it as a comment. Will email you shortly. Thanks:-)

[@pythonanimalia]

okay...let's see if i can help with it:)

[@TheBigBangggggg]

Of course, (t - z/v) * 2pi . f = (w.t - k.x)

[@linbunte4310]

imagine if you had a female disseminating purely technical information and they interrupted themselves to explain their adventures in greek rush week, or their initial disinterest in an engineering career until their buddy was there, or gave you some unrequested encouragement in the form of promises of how you will someday earn money, imagine the eye rolls

[@bigfoottoo2841]

You can't spell Geek without a double E. 🤣