It is remarkable that no one explained this before in the program I am doing, these 10 minutes brought so much knowledge together for me. Thank you.

@pauldenisowski

3 жыл бұрын

Yes, unfortunately there often isn't the time in modern engineering courses to explain these kinds of practical, test and measurement related topics, which is one of the reasons why we make these videos and other content :)

@danny_racho

Жыл бұрын

@@pauldenisowski Thank you for this. Do you plan on doing a video, where you also show how the calculated S-parameters would be needed in testing or for a system? I learned how to calculate them, but I see no practical use for these kind of information. Maybe a test setup with network analyzer and/or matching network in the process :)

@pauldenisowski

Жыл бұрын

@@danny_racho Thanks! Actually, I'm looking into that topic right now :)

This video has taught me more about s-parameters than my comms class has - 4th year engineering student. Keep making videos like these please!!! Brilliant stuff!!

@pauldenisowski

3 жыл бұрын

Thanks! And there is much more content coming, so please stay tuned!

Amazing Explanation - So much needed in the real word.

Great video Sir, such a clear explanation! Thank you very much.

Thanks for the simplicity.. I needed to remember because I saw S parameters in one engineering course but I forgot everything. this video refreshed my memory.

Excellent video - brief and precise. Thanks a lot.

Perfect video to understand S-parameters. Thanks to the team.

@user-lt5no1xt1z

7 ай бұрын

thamizh?

This channel will be very helpful for reference when I get into Grad school. I hope I can work for Rohde Schwarz one day!

Superb video!!!!! Thanks. Now i can use my VNA menu S-parameters!

Great video Sir, such a clear explanation! Thank

Brief and very informative, thank you so much

Extremely helpful video, Thank you so much!

You have saved me on the night before my exam. I love you forever.

This was extremely valuable and very well explained. Thanks for sharing!

Thanks Sir, helps a lot since I'm not even an amateur.

This video was just amazing! Thank you very much :))

Nice buddy... Thankx a lot for such a great concept explanation

@pauldenisowski

Ай бұрын

Thanks!

Well done! Now onto converting the various units...

thank you so much. super helpful!

Thank you for the explanation about S-parameters. Superb

@pauldenisowski

2 жыл бұрын

Thanks for the feedback!

Thanks for the explanation

Very well explained

Thanks for the great video

Thanks for efforts 👌

That will save my neck,,, Thank you

@pauldenisowski

Жыл бұрын

Glad it helped!

It's highly rare video found in you tube and it's useful for me and can you explain me how positive and negative cycle flows in radio frequency with in conductor

A very simple and clear explanation, none of that complex numbers rubbish! (just kidding, advanced maths will definitely come in handy here, but it can be daunting) :)

@pauldenisowski

9 ай бұрын

Thanks! I try to avoid math whenever I can - there are plenty of other resources for people who want to work the numbers :

Great video :)

nice video

thank you for this Sir awesome

very good teaching

@pauldenisowski

9 ай бұрын

Thanks!

flawless!!! im subscribed

@pauldenisowski

2 жыл бұрын

There's much more on the way in the next few weeks, so please stay tuned!

Thanks!

Very good

Thank you so much for your very good explanation 😊😊😊

Thank you so much. This is the best explanation I have seen. I was wondering how S-parameters are expressed in a matrix as a complex value. Would it be expressed as a trig. function such as real, imaginary value or polar?

@RohdeundSchwarz

4 жыл бұрын

Dear Richard, they can be expressed either as a magnitude and phase (polar) or as real and imaginary parts. S-parameters are usually stored in the Touchstone file format, and this format supports both representations (e.g. “magS11 and angS11” or “reS11 and imS11”). Best, Rohde & Schwarz Social Media Team

@richardphillips2405

4 жыл бұрын

@@RohdeundSchwarz What is Touchstone file format, magS11, angS11, reS11, and imS11? This is new to me. I got interested in this when I purchased a Nanovna and I am wanting to learn more about this subject. Again, I appreciate your KZread video on S parameters.

@pauldenisowski

4 жыл бұрын

@@richardphillips2405 Most network analyzers can store measured S-parameters in a standard file format called the "Touchstone" format. This allows for easy export and input of S-parameters, even between different instrument types and manufacturers. S-parameters are complex values which can be represented as either a mangnitude + phase (angle), or as a real part + imaginary part. The Touchstone file format specification allows you to use either representation. A simple S11 Touchstone file contains three columns of data: frequency, and then either real and imaginary values (ReS11, ImS11) or magnitude and angle values (MagS11, AngS11). Touchstone files usually have an extension .snp, where n is the number of ports. So a file containing the S-parameter data for an S11 measurement normally has the extension .s1p. Incidentally, you can save S-parameter data from the NanoVNA in Touchstone format using the NanoVNASaver tool.

@sivasankars6218

4 жыл бұрын

@@pauldenisowski When downloading capacitor s-parameter, there are 2 files that series and shunt available. Which and where and when I need to use those?

🙏🌹

Please put a link to the VSWR and Return Loss presentation video in the information above. A link to an introduction to Smith Charts too.

@forresterickson6225

4 жыл бұрын

Found the Smith Chart presentation at: kzread.info/dash/bejne/pIl4r9FwmNrPmNY.html

the thunderstorm parameter in the village at the master's exit center is linked to the object above night

@pauldenisowski

9 ай бұрын

'Twas brillig, and the slithy toves did gyre and gimble in the wabe

👌🏾

Gud sir

Hi sir, my name is Fajar I have a question. When I use network analyzer to measuring antenna, the return loss values is positive. But why return loss value I mean S11 on CST microwave studio is negative? If S11 always have a negative value, so how I can find the return loss with positive value on CST? Or you have another explanation for this case? Thanks

@pauldenisowski

4 жыл бұрын

Hi Fajar - I don't work with CST Microwave Studio, but I think the issue might be that many people incorrectly use the term "return loss." The editor-in-chief of IEEE Transactions on Antennas and Propagation published an excellent two page article called "Definition and Misuse of Return Loss," in part because close to a third of the people submitting papers to this journal (!!!) were using the term "return loss" incorrectly. (Link below, available to IEEE members). From the article: " Turning to present-day usage, return loss is now the most common term used to describe reflection and mismatch. However, frequently this term is confused with a reflection coefficient that has been expressed in dB. The logarithm is taken of the magnitude of the reflection coefficient, but this is incorrectly referred to as return loss; the result is still reflection coefficient, albeit in decibels. The difference between the two is a minus sign" "it is common place to see plots captioned and labelled return loss when, in fact, they are really describing reflection coefficient. I have even had some reviewers asking authors to change the correct form to the incorrect form, i.e., to change a positive sign to a negative sign, even though the authors labelled the plot correctly as return loss!" So I assume this is the reason you're seeing negative "return loss" values in CST Microwave Studio. Hope that helps :) ieeexplore.ieee.org/document/5162049?arnumber=5162049

🙏🙏🌹🌹

I think you should've mentioned the names of the instruments shown in the video, I found it a bit hard to find the model number of the exact VNA instrument shown in the video.

@pauldenisowski

9 ай бұрын

That's intentional: in my "technology" videos I try to avoid making references to specific products since these are always changing. We (R&S) support S-parameter measurements on all of our VNAs. In fact, I think it would be hard to sell a VNA that didn't do, at the bare minimum, S-parameter measurements.

@jb3757

9 ай бұрын

@@pauldenisowski True.

Good morning sir Please I'm working on antenna project and I want a Sparameters for RF flilter and I don't know how can I write it Could you help me or upload it Thanks a lot..!!!

@pauldenisowski

4 жыл бұрын

Normally you would obtain the S parameters for a filter by making an S21 measurement with a VNA. You might also be able to get those parameters from the manufacturer in Touchstone file format (.s2p).

how to use s-parameters and get impedance depending on frequency, pls

@pauldenisowski

4 жыл бұрын

S-parameters are measured with a vector network analyzer (VNA), which injects RF energy into one port and measures the RF energy that is returned from that port and/or which appears at the other ports. This is typically done over a range of frequencies, and the complex impedance values are provided by the instrument. There are both professional and hobbyist VNAs available that can measure and provide S-parameter values for at attached device under test (DUT).

@spysine4086

4 жыл бұрын

Paul Denisowski Hey again:) thx for ur reply. I know what u mean. But my question is different and now I will try to explain to you. In touchstone file .s2p we have f value, angle value(gamma) on each of the s-parameters (s11,s21,s12,s22). And my question is “how to convert this angles to z impedance” when i take datasheet of any transistor , i have impedance values at some frequencies, but i want to know values on different freq and use s-parameters. Maybe u know how to matching(load pull) transistor without vendor model(design kit), pls make me understand Take this site as an example www.leleivre.com/rf_gammatoz.html

@pauldenisowski

4 жыл бұрын

​@@spysine4086 If you need to know impedance values (or S-parameters) at certain frequencies or if you want to do matching, the best solution is to make measurements using a VNA :) You might want to ask this question on a site like eevblog since it's a bit too involved to answer in the Comments section of this video. Good luck!

Thanks for sharing! is it possible to get the PPT？

Why is first subscript the output port and the second subscript is the input port? It seems counterintuitive.

@AlbertRei3424

Ай бұрын

It helps with matrices calculation

pls give me some application about measuring scattering parameters

@pauldenisowski

4 жыл бұрын

The vast majority of basic network analyzer measurements are S-parameter measurements. An example of an S11 measurement is measuring an antenna: ideally we want an antenna that is "matched" to the source impedance and returns / reflects the minimum amount of transmitted energy at the given frequency. An example of an S21 measurement is measuring a filter, where we are interested in things like the filter passband (the frequency range over which it passes signals), the amount of out-of-band rejection (how much signals outside of the passband are attenuated compared to signals within the passband), and the shape of the filter (how steep the "skirts" of the filter are).

@ahmedtarek9801

4 жыл бұрын

what is the concept of operation of measuring scattering parameter

@pauldenisowski

4 жыл бұрын

@@ahmedtarek9801 S-parameters are normally measured using an instrument called a network analyzer, which injects RF into one port of a network (usually over a range of frequencies) and measures the amount of power reflected back from that port and the amount of power appearing at any other ports.

in the graphic @1:00. where is the DUT inserted ?

@pauldenisowski

2 жыл бұрын

The DUT is the box itself -- the VNA is connected to the three ports. An example of a 3 port device would be something like a splitter or directional coupler.

@labnotes23

2 жыл бұрын

@@pauldenisowski exactly...

Now, update Chinese (Taiwan) sub-title. 中文(台灣)

@pauldenisowski

4 жыл бұрын

我們將盡力而為 :)

@pauldenisowski

4 жыл бұрын

Thanks for the subtitles!

@Stone218

4 жыл бұрын

Paul Denisowski welcome,we will do more Chinese subtitle !

@pauldenisowski

4 жыл бұрын

@@Stone218 I'm very much looking forward to it. 謝謝!

@sethrollins5454

2 жыл бұрын

原來就是大哥添加的中文字幕 真的太感謝了

pika pika!

Dieslike

Bla, bla,bla. I am a college educated electrical engineer and I had never heard of s parameters or what they stood for. It sounds like something dreamed up by a math major that because they don’t really describe what they mean will never catch on. Good luck with that one.

@pauldenisowski

2 жыл бұрын

(laughs) That's how I feel about them some days as well :) Actually, they are very useful in RF, but not really used (as far as I know) in any other EE disciplines. I have an MSEE from NC State and I'm not sure I ever had anyone explain S-parameters to me either, hence the video :)

@1412dante

2 жыл бұрын

S - parameter is all about signals and very useful in RF world, and also the Smith Chart. It is the thing that makes difference between EE RF major and the rest EE major.