Energy transfer in Baluns

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#205 In this video on the topic of baluns, I look at the 2 main principles on which the energy gets transferred between the windings - on the one hand you have magnetic coupling and on another you have transmission line coupling. Now, other than these 2 separate methods, there is a third intermediate one - both methods at the same time.
Balun series:
Ep1 - Communication lines and baluns • Communication lines an...
Ep2 - Voltage and Current baluns • Voltage and Current Ba...
Ep3 - Energy coupling • Energy transfer in Baluns
Ep4 - Transmission line baluns • Transmission-Line Baluns
Ep5 - Transmission line experiments: • Experiments with Trans...
Ep6 - The Ruthroff Transformer: • The Ruthroff Impedance...
Ep7 - The Guanella Transformers: • Analyzing Guanella Imp...
EP8 - LC baluns: • Building INDUCTOR-CAPA...
Datasheet:
fair-rite.com/...
Further reading:
eng.libretexts...
Transmission Line Transformers; Jerry Sevick; Noble Publishing 2001
Special Thanks to all my supporters on Patreon!
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Опубликовано:

30 сен 2024

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Комментарии : 30

@BartKus 11 месяцев назад

Any chance of covering wideband binocular core coaxial TLTs? Particularly for impedance conversion, like in RF transistor input/output matching?

@toruscore 11 месяцев назад

@paulp1204 11 месяцев назад

Hi FesZ, I couldn't resist checking out your latest video, and it was really great, I got a lot of of it. Thank you. Paul Pr

@mr.cunamis 11 месяцев назад

Thank you these videos are really helpfull !

@woodrowbeckford7610 8 месяцев назад

This is fantastic. I have learned more from Fesz on TLT's than reading Jerry Sevick's entire book on the subject.

@helmutzollner5496 9 месяцев назад

Great video! Always wondered how these black magic magnetic devices worked. Great explanation! Thank you!

@johnfleming5797 11 месяцев назад

This is an excellent explanation, thank you! I often see baluns which appear to be constructed as common mode chokes (Guanella baluns). These baluns seem to have bandwidths that exceed the flat region of the real permeability - for instance in a material 61 Guanella balun that has a rated bandwidth of 1 - 55 MHz, while material 61's real permeability begins to decrease at about 2 MHz. How do Guanella baluns compare to the transmission line transformers discussed in the video? Do the work on the same operating principal?

@Chilangosta 11 месяцев назад

Nikola Tesla actually patented a design for an electromagnet using bifilar windings, “capable of neutralizing its self-induction”. It was a critical discovery at the time on the path to greater efficiency coils.

@chiraggupta225 11 месяцев назад

thanks, very informatics vedio!

@milesprower6641 11 месяцев назад

Would you be interested in making a video on measuring real and complex permeability?

@rjordans 11 месяцев назад

NanoVNA saver (the program used to show the transfer curve of the transformer) can help with that

@SandeepKumar-jj7zi 11 месяцев назад

@@rjordans we only get r + jwl graphs vs freq, how can we get complex permeability graphs, we have to input no of turns, ferrite sizes for that?

@rjordans 11 месяцев назад

Yes, in the latest version you have a plot for permeability. You can configure the core parameters by right clicking on the graph and setting them through the context menu

@krzysztofsoja5301 11 месяцев назад

Thank You. Now I understand UN-UN's or BALUN's for HAM radio antennas substantially better.

@olivierconet7995 11 месяцев назад

It it the fisrt time I see a complete explanation of why we use a twisted pair (or trifilar) winding on a core transformer. Thank you so much ! One question now : If I look at my HF power amplifier, it seems to work also with a (low impedance) coaxial line winding. Correct ? I am still puzzled by the magnetic coupling between inner and outer core in that case.

@michaelbulley795 4 месяца назад

Brilliant explanation!

@ioannismanousakas3040 11 месяцев назад

Thanks for the nice videos! How could this type of windings could be used with other than <a href="#" class="seekto" data-time="61">1:1</a> turns ratio?

@FesZElectronics 11 месяцев назад

You can use 3 or more wires twisted together - to have multifilar coils; and then the ends are inter-soldered, depending on the transformer you need. I'm not sure though if more than 4 wires are ever used in parallel; at some point you will be using multiple transformers interconnected for other ratios.

@yakovdavidovich7943 9 месяцев назад

@@FesZElectronics quadrifilar transformers are sometimes used. Practically, it gets annoying to wrap them, though.

@Mike-H_UK 11 месяцев назад

Another great video.

@andrzejpl9897 11 месяцев назад

👍👍👍 Thanks !

@layt01 11 месяцев назад

Genius.

@lambda7652 11 месяцев назад

Wait! is this how Baluns is pronounced?!

@FesZElectronics 11 месяцев назад

No clue... I heard multiple ways of saying it...

@yakovdavidovich7943 9 месяцев назад

IMO, in English, we should take the first syllable from "balanced", which is a soft 'a', and the first syllable of "unbalanced" (a soft 'u'), and put them together. It's kind of like a portmanteau, and normal practice is to keep the syllables intact. Hence, "balun" with a soft 'a' and a soft 'u'. The way @FesZElectronics is pronouncing it is less common, but not strictly UNcommon, per se :-). I've also heard people pronounce it with a long 'u', basically sounding like the word 'balloon'. But I think the portmanteau aspect is pretty compelling.

@rjordans 11 месяцев назад

Great explanation, thanks!

@R2AUK 11 месяцев назад

Brilliant ❤ 👍

@Wtfinc 11 месяцев назад

I love baluns.

@СавелСелютин 11 месяцев назад

спасибо друг! Твое видео было полезно!

@moondog13gmail 11 месяцев назад

Thank you for explaining transmission transformers so well, and showing the frequency sweeps. I more clearly understand the principles you demonstrated than I did after building many dozens of transformers for amateur RF applications to explore efficient broadband designs. I will say I began toying with twisted windings and the twist rate to effect characteristic impedance, and I definitely found out about the efficiency benefits of limiting space between wire and core.