Calculating S-Parameters - Lesson 3

[@peterverbeke1383]

This is honestly one of the best series and explanations I have listened to and watched. You have great ability at making seemingly complex topics lucid and comprehensible. I look forward to more in your series on electromagnetics and I think you have some great potential at really striking it big with these because they're absolutely top notch.

[@emviso]

Thank you!

[@juanpabloperezvargas1476]

I think this is one of the most useful vídeos I’ve seen during my career

[@enricodona6557]

extremely clear work-through of the problem. You are an outstanding teacher, thank you!

[@danielmelendrez1616]

Hey, Dr. Leigh. Thank you very much for this quality content. We need more of it! Very useful when you are a bit rusty on these topics. Cheerio!

[@emviso]

You're very welcome, and thank you - I appreciate the comment!

[@raspberrypimadeeasy]

Thanks for the detailed explanation

[@Allez_Malherbe_14]

Very good work. Your explanations are clear and concise. These videos will please to engineers. It's difficult to explain the S parameters to electronic engineers.

[@eggertgudmundsson7845]

Thank you! I needed a refresher and stumbled upon your videos! Concise and clear. Really well done! Thank's again!

[@emviso]

I'm glad it helped! Thanks for the comment!

[@thiru2605]

😘😘😘you are teaching better than my professor 🤗😊

[@Daniel-ir4ki]

This was super helpful! You're awesome!

[@noelaliu368]

Extremely helpful!

[@MIBA37]

I have completed my RF module examination and managed to get A- thanks to you prof..🙏🙏

[@emviso]

Congratulations! Thanks for the feedback!

[@jluke6861]

Very informative.

[@emviso]

Thanks!

[@srujaniam9762]

Good information

[@emviso]

Thank you!

[@antonivanov3830]

not exactly get the “simple circuit analysis”, as I understand, you use KVL, where you find the current looking from port 1: which is V1 divided by Z1 + Z2||(Z3+Z0), and from port 2: V2 divided by Z2||(Z3+Z0), and I have no idea, why do you multiply the right part of this 2:03 equation by Z0/(Z3+Z0)

[@mertpurtas8913]

Excellent

[@charliebe.2082]

Z0 depends on Z1, Z2 and Z3. To be matched: Z0 (the one on the right hand side) has to be Z3 + Z2 || Z1, provided the source is an ideal voltage source. Or am I wrong?

[@emviso]

Z0 is the characteristic impedance at the port - the ratio of voltage to current in the outgoing wave. It doesn't have anything to do with the internal resistors.

[@charliebe.2082]

@@emviso Thanks - got it! I was conceptually wrong.

[@sebastianfraga2001]

How can I calculate the S parameters of a quarter wave transformer?

[@trunke1085]

nice

[@Confusion-dd8yx]

what is the characteristic impedance of a port?

[@emviso]

The characteristic impedance of a port is the characteristic impedance of the connector (maybe an SMA connector, like this: fieldcomponents.com/sma-male-to-sma-female-connectors-rg178-cable-assembly.html) that is attached at that port and allows you to input and output signals from the system under test.