James Nagel
James Nagel
  • Видео 84
  • Просмотров 168 449

Видео

How to Measure Transmission Line Parameters with a NanoVNA
Просмотров 15 тыс.3 года назад
Measure characteristic capacitance, inductance, impedance, and phase velocity of a coaxial cable transmission line using nothing but a NanoVNA and some math.
NanoVNA Traces
Просмотров 7973 года назад
NanoVNA Traces
NanoVNA Calibration
Просмотров 12 тыс.3 года назад
NanoVNA Calibration
Lecture 33---Step Discontinuities and Mode Matching
Просмотров 1,4 тыс.3 года назад
Lecture 33 Step Discontinuities and Mode Matching
Lecture 32---Multiconductor Transmission Lines (x3)
Просмотров 9463 года назад
Lecture 32 Multiconductor Transmission Lines (x3)
Lecture 31---Coupled Line Couplers
Просмотров 9 тыс.3 года назад
Lecture 31 Coupled Line Couplers
Lecture30---Quadrature Hybrid Coupler
Просмотров 4,7 тыс.3 года назад
Lecture30 Quadrature Hybrid Coupler
Lecture 29---Wilkinson Power Divider
Просмотров 10 тыс.3 года назад
Lecture 29 Wilkinson Power Divider
Lecture 28c---Directional Couplers
Просмотров 1,3 тыс.3 года назад
Apologies for the little mistakes. This derivation was weirdly tough to get straight for some reason.
Lecture 28a---Properties of Three Port Networks
Просмотров 1,4 тыс.3 года назад
Apologies for the gross sound quality. My mic wasn't registering, apparently.
Lecture 28b---Circulators
Просмотров 6683 года назад
Lecture 28b Circulators
Lecture 27---Binomial Matching Network
Просмотров 2 тыс.3 года назад
Lecture 27 Binomial Matching Network
Lecture26b---Multisection Transformer
Просмотров 1,9 тыс.3 года назад
Lecture26b Multisection Transformer
Lecture26a---Theory of Small Reflections
Просмотров 1,7 тыс.3 года назад
Lecture26a Theory of Small Reflections
Lecture 25d---Analytic Solutions for Series/Stub Matching
Просмотров 3443 года назад
Lecture 25d Analytic Solutions for Series/Stub Matching
Lecture 25c---Shunt Stub Matching
Просмотров 5723 года назад
Lecture 25c Shunt Stub Matching
Lecture 25b---Series Stub Matching
Просмотров 7413 года назад
Lecture 25b Series Stub Matching
Lecture25a---Series/Stub Matching Networks
Просмотров 1,7 тыс.3 года назад
Lecture25a Series/Stub Matching Networks
Lecture 24c---Algebraic solutions
Просмотров 4833 года назад
Lecture 24c Algebraic solutions
Lecture 24b---L-Section Networks
Просмотров 1,6 тыс.3 года назад
Lecture 24b L-Section Networks
Lecture 24a---Lumped Element Matching (Intro)
Просмотров 1,2 тыс.3 года назад
Lecture 24a Lumped Element Matching (Intro)
Lecture 23c---VNA Calibration
Просмотров 2,3 тыс.3 года назад
Lecture 23c VNA Calibration
Lecture 23b---Decomposition Rules
Просмотров 4413 года назад
Lecture 23b Decomposition Rules
Lecture 23a---Signal Flow Graphs
Просмотров 8453 года назад
Lecture 23a Signal Flow Graphs
Lecture22b---Impedance to ABCD Transformation
Просмотров 1,3 тыс.3 года назад
Lecture22b Impedance to ABCD Transformation
Lecture22a---Transmission (ABCD) Matrix
Просмотров 6 тыс.3 года назад
Lecture22a Transmission (ABCD) Matrix
Lecture21b---Scattering to Impedance Transformation
Просмотров 5833 года назад
Lecture21b Scattering to Impedance Transformation
Lecture21a---Scattering Matrices
Просмотров 1,1 тыс.3 года назад
Lecture21a Scattering Matrices
Lecture 20c---Lossless Networks
Просмотров 5773 года назад
Lecture 20c Lossless Networks

Комментарии

  • @user-em5fx7pk3f
    @user-em5fx7pk3f 4 дня назад

    Hello, you sure about ISOLN, what is the logic behind that? Because oficial tutorial says that "If there is only one load, connect the LOAD standard to port1( CH0 ) , the port2( CH1 ) can be left unconnected."

    • @jamesnagel2872
      @jamesnagel2872 2 дня назад

      I doubt it matters much. The whole point is to just ensure that no signal from CH0 makes its way to CH1. If you can give a compelling use-case where the distinction makes a difference, I'd like to see it.

  • @alanren1
    @alanren1 25 дней назад

    Can you please share what that book is ? it does not seem the book you mentioned by Clayton Paul

    • @jamesnagel2872
      @jamesnagel2872 22 дня назад

      www.amazon.com/Analysis-Multiconductor-Transmission-Lines-Clayton/dp/0470131543

  • @bevo65
    @bevo65 27 дней назад

    This is the best NanoVNA tutorial on RUclips. Thanks and bravo!

  • @Daphadil2001
    @Daphadil2001 Месяц назад

    Thank you from Canada!🇨🇦

  • @baghdadiabdellatif1581
    @baghdadiabdellatif1581 Месяц назад

    Wow, thanks to the RUclips algorithm and thank you very much for this amazing explanation.

  • @baghdadiabdellatif1581
    @baghdadiabdellatif1581 Месяц назад

    Great work 👏👍👏 thank you

  • @jellyproducer2988
    @jellyproducer2988 Месяц назад

    life saver <3

  • @Bingong556
    @Bingong556 2 месяца назад

    Thanks for all the videos!

  • @douglasvinicius5020
    @douglasvinicius5020 2 месяца назад

    What book was that?

  • @Berk-lf6ge
    @Berk-lf6ge 2 месяца назад

    I cannot thank you enough. You explain so perfectly, that there is never a moment that i cannot follow. Everything makes sense

  • @j.w.8663
    @j.w.8663 2 месяца назад

    Should you be doing this with your coax coiled in a tight loop?

  • @bacharbaridi
    @bacharbaridi 2 месяца назад

    Hey mister James Nagel I wanted to thank you for your courses it helped me very much. Is there a Microwave engineering II course available ?

  • @jasonleng2490
    @jasonleng2490 2 месяца назад

    Thank you. This is very helpful.

  • @stevexiao1488
    @stevexiao1488 2 месяца назад

    Awesome! Just had a chance watching this 3 year old video. Could someone explain why Vp=0.67c?

  • @jacobvandijk6525
    @jacobvandijk6525 3 месяца назад

    @ 2:16 This substitution is done to get rid of the quantity dI and obtain a relation between V's only; the same for the I's, of course.

  • @jacobvandijk6525
    @jacobvandijk6525 3 месяца назад

    @ 8:49 What is so steady about the SSS?

  • @veronicanoordzee6440
    @veronicanoordzee6440 3 месяца назад

    @ 3:51 Unfortunately, this is NOT what's happening physically: because only negative charges (= free electrons) are moved by the potential difference. But the result is the same.

  • @aasmundnrsett8751
    @aasmundnrsett8751 3 месяца назад

    thanks!

  • @adamaj4495
    @adamaj4495 3 месяца назад

    thank you

  • @fundamentalslearner7460
    @fundamentalslearner7460 3 месяца назад

    Helpful ❤

  • @hubercats
    @hubercats 4 месяца назад

    Great video. Thank you!

  • @OrSh
    @OrSh 4 месяца назад

    Hello!

  • @danielrinconcaicedo9272
    @danielrinconcaicedo9272 4 месяца назад

    Great explanation! Thanks a lot

  • @Prashantkumar-rw1xl
    @Prashantkumar-rw1xl 4 месяца назад

    This is great and helpful

  • @alexandermuller8858
    @alexandermuller8858 4 месяца назад

    Very nice explanation, thak you sir. The Kernal in Fredholms equation is actually the Green's function if im not mistaken. This shows somehow the power of this method. If i know the Green's function i can apply this method to solve many different type of Problems.

  • @noahchai6824
    @noahchai6824 4 месяца назад

    Greatly Imspired. Finding Helpful.

  • @LATIFAHMOHDNOR-zy1mq
    @LATIFAHMOHDNOR-zy1mq 4 месяца назад

    What is comformal mapping?

    • @LATIFAHMOHDNOR-zy1mq
      @LATIFAHMOHDNOR-zy1mq 4 месяца назад

      Page 85 Mapping by itself is a very elementary geometric technique.

  • @LATIFAHMOHDNOR-zy1mq
    @LATIFAHMOHDNOR-zy1mq 4 месяца назад

    Page 81 13. S. B. Cohn, "Problems in Strip Transmission Lines," IRE Trans. Microwave Theory Tech., Vol. MTT-2, pp. 52-55, July 1954.

  • @danielrinconcaicedo9272
    @danielrinconcaicedo9272 4 месяца назад

    Such a wonderful explanation, you're the best!

  • @Nobody_114
    @Nobody_114 5 месяцев назад

    Thank you so much for making this video. Excellent explanation 😃.

  • @user-ux4gj1mq4c
    @user-ux4gj1mq4c 5 месяцев назад

    What was the logic for performing the derivative of the equations with respect to Z? I know it generated the Helmholtz equation but I’m trying to conceptually understand why it was performed.

    • @jacobvandijk6525
      @jacobvandijk6525 3 месяца назад

      It is with respect to Z because in lecture 2b the transmission line was split up in little pieces (dZ).

  • @user-md4lu5vn3c
    @user-md4lu5vn3c 5 месяцев назад

    Great explanation! Thank you so much!

  • @nickzevgolis8594
    @nickzevgolis8594 6 месяцев назад

    In the simulation can you define the axis please ?? Thanks for the video series explaining wave modes from the beginning !!!

  • @anlpereira
    @anlpereira 6 месяцев назад

    The best explanation I've seen how to understand why it is used 50 Ohm impedance cable. Thank you very much.

  • @gl7389
    @gl7389 6 месяцев назад

    Hello Sir, For E(x,y,z) = E0*e^-j(ky*y + kz*z) in x axis, travel direction in z direction. Is it true that, if ky is not 0, then it is TE mode, if ky is 0, then it is TEM mode?

  • @user-vp9dt5yz5y
    @user-vp9dt5yz5y 6 месяцев назад

    Can you get the transmission coefficient without using the matrix, such as voltage division?

  • @rababzehra7771
    @rababzehra7771 6 месяцев назад

    Love you. Marry me please. You explain things so clearly 😩😭

  • @elitestryker5709
    @elitestryker5709 7 месяцев назад

    very engaging coment

  • @htibi100
    @htibi100 7 месяцев назад

    Tnx !

  • @user-qd8li6zv7u
    @user-qd8li6zv7u 8 месяцев назад

    You are one great instructor!!!👌👏 I understand everything you teach!!!

  • @baghdadiabdellatif1581
    @baghdadiabdellatif1581 8 месяцев назад

    Thank you

  • @berlindx1723
    @berlindx1723 8 месяцев назад

    This video was helpful to tie the phasor math back to real signals in the time domain. Around 6:51 in the video you write ...- j*sin(...). Where did the negative sign on the j*sin term come from?

    • @jacobvandijk6525
      @jacobvandijk6525 3 месяца назад

      It came from his brain, but it is a small error. It should be +, like in Euler's formula.

  • @pastorericardo
    @pastorericardo 9 месяцев назад

    Intersting to see that reflection cause current and voltage lag, so the source sees a reactive load, and VSWR is also well visualized

  • @pastorericardo
    @pastorericardo 9 месяцев назад

    very good!!!!!

  • @islamyahia6100
    @islamyahia6100 9 месяцев назад

    Thank you for this vedio this vedio was very helpful for me.From Egypt

  • @Superkuh2
    @Superkuh2 9 месяцев назад

    So... in coaxial cable TEM is just "normal" electric circuit behavior and that's why it has no cutoff frequency? Despite coax's (or parallel plate's) gap size being centimeters it can pass 100 meter wavelength RF signals because the waves don't actually have to fit in the gap. They're from charges moving in conductors. And the TE/TM modes are very different mechanisms entirely where the space between the conductive cavities has to be big enough to support the electrical length of the frequency's TE or TM mode electromagnetic wave propagation? So tiny diameter coax in TEM mode can pass DC to some high GHz, it's actual size doesn't matter because it's just wires being wires (even if impedance is defined by the ratio of radii). But with a the TE_11 mode in a too big for the frequency coaxial cable, the absolute size *does* matter. And no centimeter size coaxial cable can pass a 100 meter size TE_11 mode wave (efficiently). But a giant 50 meter coaxial cable of the same impedance could.

  • @istvanpapp8654
    @istvanpapp8654 9 месяцев назад

    in u another video u said V0 is a complex number..