They really are helping! :) Especially to get to the next level on my way to eventually changing to a career in the sciences. Your videos are definitely the most clearly defined with no fuzzy "half-truths". ;) I think it's by far the best way (at least for me) as it stops a lot of the false interpretations we tend to derive when given only the easy half of the full explanation. Look forward to more!
great video! thank you, it really helped me to prepare my class presentation. I read my textbooks and i seems unable to understand this basic parts, and you helped me a lot sir. thank you!
Refraction could be explained by a one- off torque on the wavefront caused by a slowing of the leading edge by the denser medium and the superluminal phase velocity of the wavefront along the surface. Thanks!
Immensely helpful video!!Thank you very much.Can you please elaborate through visual medium on on how microwaves originate from the magnetron antenna and in the process transmitted through the waveguides without reflecting back and damaging the antenna or magnetron itself?
Whoa, maybe I should have been trying to learn waveguides from physicists instead of EE's all along. Never seen such a clear explanation. It's hard to believe that information isn't being transmitted in the wave crashing analogy though.
Thanks the kind comments.There is no information that you could put at the beginning of the crashing waves that would then be transmitted to the end of the crashing wave.
At 23:18, you cite "high frequency radiation" as "radio or microwaves". Is it supposed to be "low frequency radiation"? Or are wave guides used to transport higher energy EMR, such as UV, X-ray, or Gamma rays?
@11:48 why does the E field have to be zero at both sides? Can it not reflect even though it's not zero at the moment of impact? Don't understand this.
Cartman It's a node, magnitude should be zero. Also, the two points are nodes, because this is not the E field in question, it is the component of the electric field E in X-axis' direction. This component is a purely standing wave, and for this reason the image shows zero on both sides. If the component of field wasn't zero at the end points, there'll be some part which will travel forward and some will be reflected backwards, as opposed to fully reflected back (standing wave's property). Hope this helps!
Cartman To put another perspective on it, this is because it is a "perfect" conductor. If an electric field approaches a conductor, the charges rearrange immediately and result in a null field.
Great video, thanks for the explanation! I am trying to envision what would happen to a plane wave as it enters a wave guide at (say) a 45 degree angle. Obviously before entering the waveguide, it would progress uninhibited. However, say it were oscillating at the critical frequency at which it would just barely be able to progress through the waveguide. It would seem as if the wave would have to essentially turn upon entry, but this seems nonphysical. Could you put any extra intuition on this process? Thank you!
You said if A is less than wavelength/2, no radiation cannot go through waveguide. Just to be clear, that means that if A = wavelength/2 then some radiation can go through? I thought Kz = 0 at wavelength/2. Is this sort of like a limit property?
Does this mean that if I try to send some wavelenght for example 2cm of electro magnetic radiation trough waveguide with a=1,2cm. The EM radiation will ONLY go trough it if i have angle of wave to sattisfie kx=k*cos(alfa) and a=2*pi/kx ??? So there are specific angles (ALFA) that you must sattisfie in order to make waveguide usefull????? So if i choose random ALFA i will not have nothing on output of waveguide ????
This was great until 14:00 when you apply the Pythagorean theorem. Since you're dealing with spacial frequencies instead of just space, the correct form is 1/k^2 = 1/kx^2 + 1/kz^2.
Thanks for this! :) Do you take donations as I've learnt alot from your videos and would like to say a formal "thank you"! This is a very clear description of group and phase velocity in relation to waveguides. I'm trying to relate this to how light can seem to slow down in a medium such as glass due to group and phase velocity but can't quite picture it as clearly as it works here for waveguides. I hope at some point you might find a reason to cover this too! :) thanks again!
Please excuse my ignorant question. When you refer to light "slowing down" is that an accurate description? I never took physics and failed calculus miserably. For 21+ years I was mechanical design using Unigraphics NX and Hypermesh. The most complicated math I used regularly for dimension tolerance stacks was trig. The internet has opened a bunch of possibilities. So Im attempting to grasp a lot by watching these. I cou;ld ramble on but simply to say the research going on will mean the convergence of technologies which would have never occurred as recently as 15 years ago. So these are exciting times. Musk is without a doubt a pioneer
Maybe a good way to summarize this is to simply note that if the wavelength doesn't properly correspond to the internal dimensions of the wave guide, the wave will annihilate itself trying to pass through.
Thanks for your very kind comments. No donations are necessary. If the videos are proving helpful I am more than compensated. Thanks again.
@Jasper Gunnar Definitely, been using Flixzone for since december myself =)
@Jasper Gunnar yup, I have been watching on flixzone for months myself :D
this is the best video explaining waveguide i've ever seen. Thank you very much!
Thank you so much! I have understood more in one video than in countless lectures about waveguides! :D
I haven't studied this kind of math, but I still got the gist of what you said. So I must applaud your stellar explanation!
I'm taking grad level emags right now, and this video helped me understand the basics that I needed to further understand waveguides. Thanks!!!
They really are helping! :) Especially to get to the next level on my way to eventually changing to a career in the sciences. Your videos are definitely the most clearly defined with no fuzzy "half-truths". ;) I think it's by far the best way (at least for me) as it stops a lot of the false interpretations we tend to derive when given only the easy half of the full explanation. Look forward to more!
great video! thank you, it really helped me to prepare my class presentation. I read my textbooks and i seems unable to understand this basic parts, and you helped me a lot sir. thank you!
You are the reason I passed my physics exam. Please keep up the good work.
Thank you for sharing. Easily but thoroughly explain how EM fields propagates through a waveguide.
You saved my college fees... thanks a lot.. this concept is not easy to explain.. u did it..Great
Refraction could be explained by a one- off torque on the wavefront caused by a slowing of the leading edge by the denser medium and the superluminal phase velocity of the wavefront along the surface. Thanks!
its very helpful for me understanding the waveguide! Thank you soooooo much!
You're welcome. Glad it helped.
Thank you so much for uploading the video,it really answered many of my doubts.
Immensely helpful video!!Thank you very much.Can you please elaborate through visual medium on on how microwaves originate from the magnetron antenna and in the process transmitted through the waveguides without reflecting back and damaging the antenna or magnetron itself?
you are such a wonderful professor..your lectures have helped me a lot..God bless you
Good, precise explanations of the equations with accompanying examples.
Whoa, maybe I should have been trying to learn waveguides from physicists instead of EE's all along. Never seen such a clear explanation. It's hard to believe that information isn't being transmitted in the wave crashing analogy though.
Thanks the kind comments.There is no information that you could put at the beginning of the crashing waves that would then be transmitted to the end of the crashing wave.
thank you for the explanation of the beach waves, to understand the geometrical concept of v > c, really very well explained, thank you very much!!!!
At 23:18, you cite "high frequency radiation" as "radio or microwaves". Is it supposed to be "low frequency radiation"? Or are wave guides used to transport higher energy EMR, such as UV, X-ray, or Gamma rays?
+Jonathan Mills Good point. I was referring to high frequency within the microwave part of the radio wave spectrum.
@11:48 why does the E field have to be zero at both sides? Can it not reflect even though it's not zero at the moment of impact? Don't understand this.
Cartman It's a node, magnitude should be zero.
Also, the two points are nodes, because this is not the E field in question, it is the component of the electric field E in X-axis' direction. This component is a purely standing wave, and for this reason the image shows zero on both sides. If the component of field wasn't zero at the end points, there'll be some part which will travel forward and some will be reflected backwards, as opposed to fully reflected back (standing wave's property). Hope this helps!
Cartman To put another perspective on it, this is because it is a "perfect" conductor. If an electric field approaches a conductor, the charges rearrange immediately and result in a null field.
Amazing video, thank you so very much!!
Great video, thanks for the explanation! I am trying to envision what would happen to a plane wave as it enters a wave guide at (say) a 45 degree angle. Obviously before entering the waveguide, it would progress uninhibited. However, say it were oscillating at the critical frequency at which it would just barely be able to progress through the waveguide. It would seem as if the wave would have to essentially turn upon entry, but this seems nonphysical. Could you put any extra intuition on this process? Thank you!
Thank you for all
You said if A is less than wavelength/2, no radiation cannot go through waveguide. Just to be clear, that means that if A = wavelength/2 then some radiation can go through? I thought Kz = 0 at wavelength/2. Is this sort of like a limit property?
Excellent lecture series. Is there any way of donation ?
Does this mean that if I try to send some wavelenght for example 2cm of electro magnetic radiation trough waveguide with a=1,2cm. The EM radiation will ONLY go trough it if i have angle of wave to sattisfie kx=k*cos(alfa) and a=2*pi/kx ??? So there are specific angles (ALFA) that you must sattisfie in order to make waveguide usefull????? So if i choose random ALFA i will not have nothing on output of waveguide ????
How do you encode a mobile signal in a carrier wave? You mentioned you have a video that explains it, but I can't seem to find it. Thanks
There is some reference to it in "Telecommunications - A Level Physics"
This was great until 14:00 when you apply the Pythagorean theorem. Since you're dealing with spacial frequencies instead of just space, the correct form is 1/k^2 = 1/kx^2 + 1/kz^2.
Sir why wave is not moving in straight , instaed of AB direction?
Thanks for this! :) Do you take donations as I've learnt alot from your videos and would like to say a formal "thank you"! This is a very clear description of group and phase velocity in relation to waveguides. I'm trying to relate this to how light can seem to slow down in a medium such as glass due to group and phase velocity but can't quite picture it as clearly as it works here for waveguides. I hope at some point you might find a reason to cover this too! :) thanks again!
Please excuse my ignorant question. When you refer to light "slowing down" is that an accurate description? I never took physics and failed calculus miserably. For 21+ years I was mechanical design using Unigraphics NX and Hypermesh. The most complicated math I used regularly for dimension tolerance stacks was trig. The internet has opened a bunch of possibilities. So Im attempting to grasp a lot by watching these. I cou;ld ramble on but simply to say the research going on will mean the convergence of technologies which would have never occurred as recently as 15 years ago. So these are exciting times. Musk is without a doubt a pioneer
Great explanations. Thanks much.
I have a question why did you say the wave has two components such that one of them is in the x direction?we said its ocslating in the y dierection?
Excellent lecture, thank you.
Wow this is wonderful Sir
Very detailed and simple explanation. Thanks doc :-)
Great video, thanks.
Thank you for this video... Please i will Like to know more about rectangular waveguides and circular waveguides.
Should it have been (y-x)/t = c?@5:55
I think the positive unit vector z is marked in wrong direction.
How can you know the x component is in a stand wave form？
can you use optic fibre instead of waveguide?
Maybe a good way to summarize this is to simply note that if the wavelength doesn't properly correspond to the internal dimensions of the wave guide, the wave will annihilate itself trying to pass through.
thanks a lot, you arena great teacher!
Thanks for the video. It was very helpful. :)
Really helpful videos, thank you
why a left handed coordinate system though?
Thank you for the thorough
Transversal component is zero for metals so ke should be zero but you have not taken it to be zero , why so??
thank you !
Thank you
great thank you!!!
thanks!
thanks,ll u pls upload videos on waveguide filters,,,pls i need it .n u explain so lucidly
Kinda a small thing, but your coordinate systems are left handed
I think I might the only one who came here for British accent. (Kidding. Ofc DrPhysicsA did a great job here
i think some people hide behind math. i for once don't understand much of what this dude is saying :(
Nice accent.