Every University Teacher must watch this before teaching to students. Perfect, clear and neat way to explain. I request your team to continue posting such videos. Thank you so much.
My points exactly. As someone recently called to teach simplified communications in radio, these videos are an excellent source of refreshment of essential principles. I love the concise and pitch (for my level of interest anyway) of these videos and will take a leaf from the presentation style of these presentations.
I’m so impressed by how effective your short videos on VSWR and S Parameters are. I’m a lecturer who hasn’t worked in the field for many years but does occasionally dabble as a hobbyist. Recently I have been called upon to teach fundamental radio communications and it’s very refreshing to see these videos. Thank you.
I recently purchased a NanoVNA to tune my HF amateur radio antennas minimising the needing for a matching transformer. However, I was sticking to the VSWR display because the Smith chart looked complex. Thanks to this video I have found out so much more from reading Smith chart graphing now that I understand them! Thanks for making this understandable and clear.
This is the best Smith Chart refresher/lesson i've had. It makes me think why it has to be so complicated before. The technology ( video/graphical presentation) helped . Thanks. The training materials on this site , are all so Zen like.
Thank you very much! I have started to read about Smith charts many times but always given up before getting to grips with it. Your professional presentation lifts the mystic vale and reveals the elegant simplicity of the chart. Thank you. Kind Regards . . . Andy. gw0jxm
That was really well done. It was the perfect presentation style (at least for me). And there was little to no subtle marketing of your company's brand; you simply presented the base concepts along with some historical background of who the Smith in "Smith Chart" was. I understand this so much better now. Thank you.
Excellent. Just excellent... being a maths "dumbo" I've always struggled with the Smith Chart. Being a licensed radio amateur a proper understanding of the chart, it's functions, AND HOW THEY CAN BENEFIT ME by properly understanding them escaped me year on year,. NO MORE. Paul, Thank You ! this presentation should be part of every single radio amateurs course ! Am very very grateful to you for this more than excellent video. Your companies instruments for us radio amateurs are the stuff dreams are made off. Sadly... lottery tickets to win them are far and few between... but,... we live in hope! Thank you again Paul. Albert
This was a great refresher after barely using it for a few years. Also, I don't remember my profs teaching that it was a transformation of the cartesian representation, that definitely makes this easier to understand.
Great simple easy effective way to communicate how to use smith charts for understanding impedance. Thank you. This was very helpful to clear up and confirm a couple things I had been working through previously.
The VNA @ the end of this video is a righteous piece of work, would really enjoy seeing a tutorial on that piece of gear in use. Those handles on the front are so you can hang on to it while it rests on the night stand next to the bed.
Check out the Test and Measurement Fundamentals playlist at the top of the R&S RUclips channel: I've done a number of VNA related videos already and more are on the way! And as someone who worked as field apps engineer in T&M for > 20 years, I have a lot of experience with those handles :)
Very good. Thanks. only people who understands the subject clearly can explain in simple terms - ofcourse one should have passion to explain. Only few people explain to be understood while many others explain to make it sound complex.
Even though I've been working in test and measurement for over 25 years, I still learn something new myself every time I start making a new video. :) Thanks!
I have nearly no idea how to apply this or when I'll use it but the graph usage was explained clearly and consisely. I have no background in electrical engineering but I'll come back to this at some point
Thank you, I just found your RUclips Channel, but I have your Electronic Warfare pamphlet, and at least one Radio Spectrum chart. I operate a ship, and the radios, internet, satcomms, secure comms, and I'm looking to detect signals that might prove hostile. and hoping to maintain comms with the office, home, and on the ship. Plenty of radio challenges. I'm tackling them as they present themselves. Thanks for the learning materials!
Man I’m only a sophomore in high school and haven’t even taken a calculus class yet and somehow he made me understand this, please tell me your a professor or something dude!
Great presentation. In the example at 8:47, when you normalize the complex impedance, why does only the sign on the resistive component change? If I factor out -1, shouldn't we get -100 + j75 = -(100-j75)? Then -Z/50 = 2 -j1.5?
wow. This is one of the best, most effective and efficient educational presentation of practical - u s e f u l information I have ever seen. In 294 seconds. Useful because my Extra ticket expired during a crazy time of life, and I will be retaking it, building a station, and doing SOTA POTA outings. Practical, because 4.2" TFT display, 50Khz-1Ghz VNA's can these days be had for $90-$100 delivered. My thanks to Rohde Schwartz and to the creator(s) of this video. Educational excellence beyond compare.
NICE video to start to learn something for me new. i have a question please . in my LDMOS mrf6vp11kh i found included on data sheet the smith chart with this value Zload 4.6+j1.85 . what does it mean ? the characteristic output impedance? how can i understand this value better?
Assuming I'm looking at the same datasheet: there are two values given (plotted as points on the Smith Chart), one for Zsource (gate to gate impedance of test circuit) and one for Zload (drain to drain impedance of the test circuit). These are plotted as points, not lines, since they are the impedance values at a single frequency (130 MHz). Both impedances are complex, with a real (resistive) part and an imaginary (reactive) part. In order to maximize the power transfer (and reduce reflections, VSWR), complex impedances should be "matched" by having the impedance on "the other end" being the complex conjugate (i.e. reverse the sign of the imaginary part). So in the datasheet, the complex Zload impedance at 130 MHz is 4.6 + j1.85, which would be matched by having an impedance of 4.6 - j1.85 on the other end. This information can be used to select appropriate values of capacitance when designing the input and output matching networks. Hope that helps!
Yes, Z0 is the characteristic impedance and ZL is the load impedance. In many RF systems, Z0 is 50 ohms and our goal is often to find a way to make the (variable, frequency-dependent) load impedance ZL "match" the characteristic or source impedance Z0 at a given frequency or over a given range of frequencies.
Vague and distant memories of my father and some members of his ham radio club, designing their own antenna's. There was one of these charts laying on the bench. My 8 year old self got introduced to "imaginary numbers" it would be some 15 years later that this made any sense.
I think the second biggest mistake in the history of mathematics was using the word "imaginary" (instead of "complex") to describe these kinds of numbers. (The biggest mistake was Roman numerals😂)
What I have a little trouble understanding is for example of the circle where R=1.0 On that circle the real part is always the normalized 1.0 (let's say normalized to 50 Ohm). The left side of the circle passes the x-axis at the midpoint (pure resisitive, no L, no C). But at the far right it passes the x-axis at "open circuit". It would be an open circuit, also without reactance, but in the video it is stated that R=1.0 Am I missing something?
Great question. The reason why you get infinite ohms where the circle touches on the far right is because of the REACTIVE part of the impedance. The RESISTIVE part is still only 1.0. If you imagine this plotted on a Cartesian plane, the far right edge of the circle is where X = 1.0 but Y = +/- infinity. Hope that helps!
@pauldenisowski Thanks. Okay, I get now the Cartesian "folded" axis and the infinity of the reactive part, but resistive part should be 1.0 If that is true why is it an open circuit?
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
Every University Teacher must watch this before teaching to students. Perfect, clear and neat way to explain. I request your team to continue posting such videos. Thank you so much.
My points exactly. As someone recently called to teach simplified communications in radio, these videos are an excellent source of refreshment of essential principles. I love the concise and pitch (for my level of interest anyway) of these videos and will take a leaf from the presentation style of these presentations.
My professor understood the assignment 😂
Wow you're the best. I spent 2 hours in class and didn't get a damn thing but this 10 minute and I feel like an expert. Thanks a lot.
Thanks!
I’m so impressed by how effective your short videos on VSWR and S Parameters are. I’m a lecturer who hasn’t worked in the field for many years but does occasionally dabble as a hobbyist. Recently I have been called upon to teach fundamental radio communications and it’s very refreshing to see these videos. Thank you.
It's been 50 years since I first saw the Smith Chart, never got it; now I understand a lot of things in ten minutes. Thanks. K4QET
I recently purchased a NanoVNA to tune my HF amateur radio antennas minimising the needing for a matching transformer. However, I was sticking to the VSWR display because the Smith chart looked complex. Thanks to this video I have found out so much more from reading Smith chart graphing now that I understand them! Thanks for making this understandable and clear.
My pleasure - good luck!
This is the best Smith Chart refresher/lesson i've had. It makes me think why it has to be so complicated before. The technology ( video/graphical presentation) helped . Thanks. The training materials on this site , are all so Zen like.
Thanks! Really appreciate the feedback!
This is THE BEST "Readers Digest" Version of Smith Charts Ever. Thanks for this AWESOME Video and "To the Point" .approach!!
This video should be directly used as teaching materials in university. So concise and inspiring.
Thank you!
Excellent presentation. Should be mandatory for anyone that works with or plans to work with RF.
God bless you mate, I have an exam today and I couldn't understand a single word from my brain-dead teacher. Thank you!
Are you an EE now?
@@Countolaf03 no, not anymore
What happened?@@PedramNG
@@PedramNGnooooooo what happened
Back in school, the Smith chart was clear as mud. After watching this video it is a lot clearer. Good job.
Glad it helped - thanks!
Thank you very much! I have started to read about Smith charts many times but always given up before getting to grips with it. Your professional presentation lifts the mystic vale and reveals the elegant simplicity of the chart. Thank you.
Kind Regards . . . Andy. gw0jxm
A perfect way of explaining things. This guy should get an all time best-teacher award.
Thanks!
Outstanding job on this video. Simple, to the point, easy to understand, and clearly presented. Bravo!
This is the best explanation I have ever seen Understanding the Smith Chart. Well done!
Thanks - really appreciate it!
That was really well done. It was the perfect presentation style (at least for me). And there was little to no subtle marketing of your company's brand; you simply presented the base concepts along with some historical background of who the Smith in "Smith Chart" was. I understand this so much better now. Thank you.
Kudos Rhode Schwarz - these illustrations are invaluable. Thank you so much!
Thank you!
Excellent. Just excellent... being a maths "dumbo" I've always struggled with the Smith Chart. Being a licensed radio amateur a proper understanding of the chart, it's functions, AND HOW THEY CAN BENEFIT ME by properly understanding them escaped me year on year,. NO MORE. Paul, Thank You ! this presentation should be part of every single radio amateurs course !
Am very very grateful to you for this more than excellent video. Your companies instruments for us radio amateurs are the stuff dreams are made off. Sadly... lottery tickets to win them are far and few between... but,... we live in hope!
Thank you again Paul.
Albert
My pleasure Albert and thanks for the feedback - 73! Paul, KO4LZ
This was a great refresher after barely using it for a few years. Also, I don't remember my profs teaching that it was a transformation of the cartesian representation, that definitely makes this easier to understand.
Great simple easy effective way to communicate how to use smith charts for understanding impedance. Thank you. This was very helpful to clear up and confirm a couple things I had been working through previously.
Has been 15 years I'm looking at antenna theory and never understood a Smith chart. In 10 minutes, I got it
Saved tons of hours studying and listening to my course instructor!
Absolutely phenomenal!! Sir, your videos have helped me a tremendous amount in my course!!
Thank you. That was the best summary on the Smith chart I have seen.
Thanks!
Great explanation! Now I understand the display on the VNA better.
A clear, concise overview. Nicely done!
Thank you Rohde Schwarz!
The VNA @ the end of this video is a righteous piece of work, would really enjoy seeing a tutorial on that piece of gear in use. Those handles on the front are so you can hang on to it while it rests on the night stand next to the bed.
Check out the Test and Measurement Fundamentals playlist at the top of the R&S RUclips channel: I've done a number of VNA related videos already and more are on the way!
And as someone who worked as field apps engineer in T&M for > 20 years, I have a lot of experience with those handles :)
This is a great primer on understanding Smith charts. Very detailed explanation!
Amazing way to discuss importance of smith chart along with illustrations.
Short crisp and very well explained!!
Thank you!
solid 10mins cover my professor's 30mins lecture on smith chart
thanks
The best and most precise video!!
Appreciate the content and the length of the video :D
Helped a lot! Thank u so much!
Very good. Thanks. only people who understands the subject clearly can explain in simple terms - ofcourse one should have passion to explain. Only few people explain to be understood while many others explain to make it sound complex.
Even though I've been working in test and measurement for over 25 years, I still learn something new myself every time I start making a new video. :) Thanks!
I have nearly no idea how to apply this or when I'll use it but the graph usage was explained clearly and consisely. I have no background in electrical engineering but I'll come back to this at some point
Glad it was helpful - thanks for the feedback!
Clear and to the point. Thank you
Well done! I actually got that lot, You have a gift!
U explained in a very simple manner ☺️ this giant type looking smith chart..thanks 🙏
What else can i say? This is just amazing! Thank you so much for saving me from my terrible university profs.
I’m sure they’re not that bad, but thanks!
very helpful series of videos paul
Well done, a wonderful explanation, it was very easy to follow you step by step.
Thank you, I just found your RUclips Channel, but I have your Electronic Warfare pamphlet, and at least one Radio Spectrum chart.
I operate a ship, and the radios, internet, satcomms, secure comms, and I'm looking to detect signals that might prove hostile. and hoping to maintain comms with the office, home, and on the ship.
Plenty of radio challenges.
I'm tackling them as they present themselves.
Thanks for the learning materials!
Perfect
I understood without even handling a pen to write down
Nicely done
Thanks!
saved my day, great quick explanation
Very well explained - well done!
Clear and understanding.... Good presentation
Man I’m only a sophomore in high school and haven’t even taken a calculus class yet and somehow he made me understand this, please tell me your a professor or something dude!
😎 👍
No, not a professor, just someone who's making the videos he wished that he had when he was in engineering school 🙂
Well done. I think for many viewers, showing a 2:1 VSWR circle would help.
Actually, I'm planning a number of other Smith Chart related videos, including one on constant VSWR circles :) Thanks for the suggestion!
Perfect explanation. Thank you, sir.
Thanks!
Perfect and clear! Great thanks! It's very helpful to the person who never studied the electronics theory.
Thank you!
Simply amazing, Thanks
Beautifully explained....Thanks a ton....
Very much appreciated :)
Great presentation. In the example at 8:47, when you normalize the complex impedance, why does only the sign on the resistive component change? If I factor out -1, shouldn't we get -100 + j75 = -(100-j75)? Then -Z/50 = 2 -j1.5?
Great video! Thanks.
Very efficent teaching! Thank you!
Thanks - as an engineer, efficiency is very important to me :)
great sir superb explanation and presentation is awesome
The Tōsaku Mizuhashi Chart was published in 1937 two years before this Philip Smith Chart!!!
Very good explanation 🌹.
Thank you
Thanks!
Thank you very much. Is there a PDF of this presentation?
Thanks! A whitepaper version is under development.
Awesome Explanation.
Is that a vintage Rohde Schwarz VNA shown an the end? If so, what year would that be (approximately)? Just curious. BTW, freaking great video!
Thanks! That's the Z-g-Diagraph, the world's first network analyzer, which was developed by R&S in the 1950s.
Really awesome. Helped a lot. Thanks
Thank you!! Very good presentation!
Great effort.. Thank you, Keep it up
10 out of 10 I now remember what I learned 40+ years ago, god it was hard to do with a pencil
What about wavelength? For example, If i'm trying to solve for a cable of certain length...
There are LOTS of things you can do with the Smith chart. I'm planning future videos on topics like the one you mentioned.
simply amazing
thanks, thanks, thanks... great explaination
fabulous, speechless
Great very easy to understand now thankyou!
thank you so much for your effort.
very nice explanation!
Very much appreciate the feedback!
Yeah you should definitely watch this
Top class !!👏👏👏
Well done best explanation simple and clear
Thank you!
very nice explanation
wow. This is one of the best, most effective and efficient educational presentation of practical - u s e f u l information I have ever seen.
In 294 seconds.
Useful because my Extra ticket expired during a crazy time of life, and I will be retaking it, building a station, and doing SOTA POTA outings.
Practical,
because 4.2" TFT display, 50Khz-1Ghz VNA's can these days be had for $90-$100 delivered.
My thanks to Rohde Schwartz and to the creator(s) of this video. Educational excellence beyond compare.
Thanks! 73 de Paul, KO4LZ
Thank you so much !
NICE video to start to learn something for me new.
i have a question please .
in my LDMOS mrf6vp11kh i found included on data sheet the smith chart with this value Zload 4.6+j1.85 .
what does it mean ? the characteristic output impedance? how can i understand this value better?
Assuming I'm looking at the same datasheet: there are two values given (plotted as points on the Smith Chart), one for Zsource (gate to gate impedance of test circuit) and one for Zload (drain to drain impedance of the test circuit). These are plotted as points, not lines, since they are the impedance values at a single frequency (130 MHz). Both impedances are complex, with a real (resistive) part and an imaginary (reactive) part. In order to maximize the power transfer (and reduce reflections, VSWR), complex impedances should be "matched" by having the impedance on "the other end" being the complex conjugate (i.e. reverse the sign of the imaginary part). So in the datasheet, the complex Zload impedance at 130 MHz is 4.6 + j1.85, which would be matched by having an impedance of 4.6 - j1.85 on the other end. This information can be used to select appropriate values of capacitance when designing the input and output matching networks. Hope that helps!
@@pauldenisowski many thanks
Thank You
Exceptional explanation.
Is Z0 the same thing as the characteristic impedance? Just trying to make sense of it in terms of my class
Yes, Z0 is the characteristic impedance and ZL is the load impedance. In many RF systems, Z0 is 50 ohms and our goal is often to find a way to make the (variable, frequency-dependent) load impedance ZL "match" the characteristic or source impedance Z0 at a given frequency or over a given range of frequencies.
Vague and distant memories of my father and some members of his ham radio club, designing their own antenna's. There was one of these charts laying on the bench. My 8 year old self got introduced to "imaginary numbers" it would be some 15 years later that this made any sense.
I think the second biggest mistake in the history of mathematics was using the word "imaginary" (instead of "complex") to describe these kinds of numbers. (The biggest mistake was Roman numerals😂)
It is very helpful.
The greatest use of the smith chart is two wizards trying to simultaneously counterspell each other...
At 09:30, isn't R=0.28 ?
I had to look very closely (your eyesight is clearly much better than mine), but yes, the red line does seem closer to 0.28 than 0.30. :)
@@pauldenisowski I couldn't resist. I've watched all of your videos and enjoyed them all immensely. Thanks!
@@rawbbaly8268 Thanks! Really appreciate the feedback!
quite efficient lesson, thanks a lot
Thanks!
Thank you very much
This is million times easier than the Wikipedia page
You are amazing...thank you..🙏
What I have a little trouble understanding is for example of the circle where R=1.0 On that circle the real part is always the normalized 1.0 (let's say normalized to 50 Ohm). The left side of the circle passes the x-axis at the midpoint (pure resisitive, no L, no C). But at the far right it passes the x-axis at "open circuit". It would be an open circuit, also without reactance, but in the video it is stated that R=1.0 Am I missing something?
Great question. The reason why you get infinite ohms where the circle touches on the far right is because of the REACTIVE part of the impedance. The RESISTIVE part is still only 1.0. If you imagine this plotted on a Cartesian plane, the far right edge of the circle is where X = 1.0 but Y = +/- infinity. Hope that helps!
@pauldenisowski Thanks. Okay, I get now the Cartesian "folded" axis and the infinity of the reactive part, but resistive part should be 1.0 If that is true why is it an open circuit?
Nice job!
GREATEXPLAINATION
Thank you bro god bless you!🦾
Thanks!
This just saved my bacon! Thank you
Glad it was helpful!
Many doesn't realize that testing is as challenging as designing something if not more challenging
I feel exactly the same way :)
thanks a lot
Absolutely helped me with making a PB&J sandwich
That device and it’s inner working Looks and sounds just fashinating.
Thank you..