Lossless Impedance Matching - Part1/2

#145 In this video I look at how impedance matching can be done with reactive components - inductors and capacitors. Since the matching elements are reactive, and at least in theory have no resistive part, the matching is considered lossless. I look at the basic operating principles involved and also how such matching networks can be built.

Late edit: at 2:23 8:42 and 12:45 in the formula for Lp, the term Qel is a denominator not a numerator

Excel worksheet:

Related topics:

Further reading:
Radio-Frequency Electronics Circuits and Applications; Jon b. Hagen
The Art of Electronics; P. Horowitz and W. Hill; Chap H.2.4

Special Thanks to all my supporters on Patreon! Especially @afiskon, Ralf B., Paul Pr. Richard and Jonathan Alvarado!

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[alaricsnellpym]

This is a fantastic explanation! Amateur radio people building antenna matchers should watch this :-)

[patrickoneillnl]

As I am just getting into HAM radio, much is still new. However, I have watched several of your videos and love how clearly you explain concepts and go through the trouble of simulating the circuits and building and testing an example. Thank you!

[kennymanchester]

The very best series on impedance matching theory and practice I have found online. Thanks so much for this work.

[johnwest]

Excellent. Finally a clear explanation of impedance matching, and in under 21 minutes, too! I'm putting the link to this video in my Favorites. Thank you.

[jamppap]

This video was sooo good! I learned better from this video about impedance matching than at a university :D

[MXYM]

Excellent presentation. Looking forward to part2. Thank you.

[johanneslode]

Great explanations to come to T- and Pi-filters. You made my day. Thanks.

[RCH]

You can use Smith chart to design these circuits without the use of equations :-)
It's with adding that these circuits works well up to 1 GHz. Above that it's better to use eg. matching stub.

[Projacked]

Super cool video; going into my favorite list at once.

[MNTVHomebrewing]

Very good, clear explanations. Thank you.

[vicafrederick]

thank you for the comment in the description on the typo!

[plinsburg]

Ok, I got it. Open Patreon, click on support.
Thank you for the video.

[waterfuel]

Help needed! How do I match impedance of inverter16v AC output SOURCE to 16vAC isolation transformer primary, that I have to hand WIND, for 4 ohms load of 32v AC 6 amps secondary ? Do I use the ohms of primary 16v + 12 amps division or the resistance .06 ohms of inverter output contacts terminals at 20khz frequency? Voltage and turns ratio same as 1:2. The online formula for inductance value of turns requires reactance value in ohms, at the frequency of source.

[curtstacy]

Perfect timing of your video. I was just working on this. excellent job! If you could add a little? on the RF amplifiers, they are using a transformer as part of this impedance matching on input and output. could you explain this? I bet you could clear some confusion I have on this.

[Steven_Bennett_YT]

Your videos are excellent, now I understand the things that confused me at university! Would it be possible to add links to download your LT-Spice simulations so we can reproduce your experiments? If so thank you.

[maksymkloka]

Fantastic. One thing though ... is your Excel equation for Lp correct? Could you double check. Qel seems to be in demoninator.

[biswajit]

Could you please show simulation of 3 phase BLDC motor simulation in LTspice

[TanukiTakey]

Can we get a link to the spreadsheet shown early in the video? Maybe a google sheets version? Thanks!

[bhadreshthakkar]

Hello...
Nice explanation
Can you please share the excel sheet.

[pattheitguy]

I appreciate these videos tremendously, because they make right to repair much more accessible to the average person. But as far as video production goes, this habit of having the video as hundreds of little tiny videos that are put together is starting to get on my nerves. It takes far too long to produce a video like this, it isn't necessary, and it makes it weird for the viewer. Next time, just for kicks, record the video as if you're actually explaining it to somebody, instead of spending an hour or two afterward in post trying to slice and dice it. People don't mind the extra 5 seconds of length of the video if you don't microcut it.