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About Resonant Dipoles 

FesZ Electronics
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#199 In this video I set out to correct one of my previous mistakes and look at the finer details of dipole antennas and observe when exactly they are resonant. I have a look a some basic simulation results, and then proceed to build some antennas and try to observe what constructive parameters impact their resonance.
Related content:
Antenna Equivalent Model: • Antenna Equivalent Model
Further reading:
courses.ansys.com/wp-content/...
www.antenna-theory.com/antenn...
Antenna theory and design; Stutzman, Thiele; 1981;
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11 авг 2023

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Комментарии : 39   
@gdvissch
That was interesting and gave me some new insights. Impressed how you turned a (small) mistake in an earlier video into a very useful new video! Keep up the good work…
@lisaball1701
Very interesting video. Thank you for sharing. It’s a little distracting how your voice has only 3 inflection tones. Medium for most of the video, with high pitch flicks at end of comma, and finishing low at end of sentence. Which makes seem like it’s an endless run on sentence.
@willthecat3861
Ok... I don't understand the '50' ohm calibration load you made... at 13.58 in the vid. Looks to me... like you soldered a 49.9 SMD ... in parallel... with a 200K through hole. If so? ... how does that get you closer to 50 ohms?
@bigal159
just a quick thanks for all your videos. They have helped me greatly in my attempt to learn hobby electronics. Thankyou!
@TheElectronicDilettante
What firmware are you running on your nanovna? It looked like your vna was set to 1024 sweep points…. You must have one of the higher end vnas. Great video as always!
@filosofoPython933
I already signed up for the first video, great content.
@saeedhaidar1375
Have you tried qspice ?
@alexengineering3754
Is the ballun necessary? The antenna dont care about DC and the current between the Terminals should also always be equal.
@Mike-H_UK
Thanks for an excellent video. If you don't mind, can I ask a quick question because I can't find an answer on the internet and you may be one of the only people on the planet who knows.....? Do you know whether it is possible to add both real and imaginary terms to the inductance of an inductor in LTSpice? I need to simulate both the inductance and loss - the latter being important for thermal noise. Ideally, I would like to have a look up table for the frequency dependancy of both terms, but I guess that is asking too much! At the moment, I run repeat simulations at different frequencies using modified values of L for the real part. I also add a series resistance for the imaginary (loss) part. As these need manually editing as a pair for each frequency, I feel that there must be a batter way...... Have you ever come across anything?
@DivinoFiatella
Nice video and great explanation.
@davidelang
re: why the diameter of the material matters, an explanation I came up with which may not be technically correct, but seems to be close enough to build useful antennas and easier to wrap my head around:
@viktorsak
Can I just say that this channel is probably the best RF theory resource there is? It helped me understand SO many concepts already, and I haven't watched even through half of the videos yet. Fesz, you are an awesome teacher, and you deserve several times more subscribers.
@n5yiz
This is an excellent presentation!
@faustdownunder
Excellent work.
@R2AUK
👍
@olivierconet7995
Very interesting, as always. Thanks.
@daskasspatzle2396
@daskasspatzle2396 10 часов назад
About the LiteVNA: How long is your calibration stable?
@vincei4252
FesZ you gonna be taking a look at the new QSpice from Qorvo ?
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