Lecture -- The Scattering Matrix
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Күн бұрынThis video introduces the scattering matrix and discusses how it is related to the [Z] matrix. The video also describes translation of the terminal planes and gives some examples. This video is related to Microwave Engineering.
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@seandafny 3 жыл бұрын
I am somehow beginning to understand. Amen amen
@user-jl3dr5tw6k Жыл бұрын
so useful to me, thanks a lot!
@bennetbrooks1 3 жыл бұрын
Much appreciated. Thank you.
@empossible1577 3 жыл бұрын
I recommend figuring out how to make a video about scattering matrices that is exciting. Let me know and I will do it!
@samuelkctweneboah-kodua5660 2 жыл бұрын
i wish i had money to advertise this microwave course for students to see on youtube.
@empossible1577 2 жыл бұрын
Me too!
@matthewpanipinto7858 2 жыл бұрын
Hello! I'm working my way through your course on 3D RCWA and I noticed that on slide 18 of this lecture, you're taking the inverse of A-XBA^(-1)XB but in your implementation, you do not. Why is that? Thanks!
@empossible1577 2 жыл бұрын
Somehow I missed this comment. Very sorry! I suspect the following... It is very rare in numerical methods to calculate the inverse of a matrix. Something like A^-1 B is not the inverse of A times B. Instead, look at this as matrix division. In this case, it is a predivision. So the code in MATLAB would be A\B instead of inv(A)*B. The matrix division does not calculate the inverse and will run orders of magnitude faster and more efficiently than if a matrix inverse is calculated. Is this what you are seeing?
@charliehuggins3773 2 жыл бұрын
at about 10:30, I don't understand, surely impedance matching enforces the reflection to be 0? What would it be in the general case?
@empossible1577 2 жыл бұрын
In the general case, it is a fields problem. The fields on one side of an interface must match the fields on the other side. A change in impedance being responsible for reflections assumes the transmission line is otherwise the same. However, if you hook a 50 ohm micro coaxial line up against a 50 ohm parallel plate line, you will get reflections because the electromagnetic fields look different in the lines.
@benjaminmordaunt5679 3 жыл бұрын
At 4:17, how does eq. 3 become eq. 4? Shouldn't eq. 4 have the two positive signs flipped to negative?
@empossible1577 3 жыл бұрын
It appears we goofed. Thank you for catching the mistake!! We will fix this ASAP.
@seandafny 3 жыл бұрын
How do i stay awake besides standing the entire time.
Nick Heumann University
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