love this guys voice

perfect to the point

can you tell me how to improve the gain of a tapered antenna on sub-6 GHz frequency?

Where were you when I was at Radio School? :O)

Good analysis, thank you for the video. from your hand drawing, I understand the the dipole antenna become thicker and thicker and at the end it become the entire ground plane with the short circuit in parallel. so the Raspberry Pi use the entire ground plane as the radiating element. It is quite inspiring to me.

Thanks!!!

Hi, couple of suggestions, if I may: 1) The ferrite backer also increases the coupling factor 'k' --> not just "shielding". 2) FEMM (takes ~ 4 hours to learn) Free, though not open-source. --> can quickly calculate the coupling factor 'k' for any arbitrary geometries of coil-pairs --> Plug 'k' into (e.g.) LTSpice --> (My optimization-workflow) --> Great Success!

And what size coax are you using there?

It seems the ground plane has been extended by the length of your cable, attached test equipment, etc. Could the ground plane be "broken" using ferrites?

You have prepared a very educational video. Thank you.

Thank you so muchhhhhhhh for the explanation and especially the website of maxwells!!! Never found so much interest and keep digging now!

Thanks

Thx, it’s a clear explanation

hi. Can you further explain how did you measure VSWR at 1:37? What VNA have you used and how it was connected to the pigtail you just soldered. Thank you

Thank you, sir!

Succinct ! Sorry I'm late to the party ! This is fascinating ! Best ever ! Thank you ! 👍😉

I think the guy who runs this channel died

Thank you so much for this and the website. You are a great dude!

Without a doubt FFT has its application in various fields, as an example I used to do vibration analysis on large centrifugal compressors to identify peaks at different multiples of frequencies to pin point the problem, mechanical looseness, bad bearings,misalignment, bar operations etc causing the problem, this effectively controls the operations of large refrigeration system the plant uses for filtering out large quantity of wax in lubrication oil processing. I also found great use of FFT in structural dynamic analysis in mechanical engineering applications. Vibrations is an important area of mechanical engineering and FFT is essential ingredient of vibrations and structural dynamic Analysis of mechanical systems.

Sorry, but I must disagree with people in this thread. Your video does not do a good job of explaining. The website does a better job. You are still using “technical” terms in your video. And sometimes you jumble or misrepresent terms and/or their definition.

is the polarization direction useful?

Thx for the website and videos. God bless

I have to say "wow". Thank you for your explanation.

Thanks a lot!

OMG I finally found someone with the same pen grip as me, except that I'm right handed.

Excellent! You teach understanding, not mystery math. That's a very rare commodity in RF engineering. I know little more than arithmetic, but I want to at least generally understand what's happening with different sorts of antennas, how, and why. I want to be able to look at an antenna and know why it is the way it it is, what it's best for, and what would make it better, not calculate the number of photons leaving the antenna at any given radiation angle as a function of ground conductivity. On the other hand, I have no use for the plethora of, "How to stand up your 'Super Duper Magnum Sidewinder Eliminator III++' antenna for killer DX," sorts of KZbin videos. In less than 9 minutes you came very close to nailing everything I wanted to know about slots except for 2 things, what the narrow-side width of the slot should be and why, and what effect, if any the size of the flat metal surface has. Are currents flowing on it further away from the edge that decrease resistance and increase the antenna Q, or can this all be done just as easily with wire and obtain the same result?

Excellent and useful video

Maxwell's theory of electromagnetism has already been proven wrong.

thanks for your bravo explanation. I have no knowledge about antenna, but you make it simple and easy to understand.

Sir One help is required how to RLC ckt drwa of aperture coupled microstrip patch antrnna

Very good. Studied physics a long time ago and had forgotten the elegance of it all. Excellent.

How long does the battery last

Nice one Dr. Bevelacqua

I never would have thought that you could short any antenna that's very unintuitive to me.

As an electrical engineer this would have been awesome to hear in Emag in college. You’re absolutely right I can do all the math but didn’t fully understand what the equations meant. Thanks for this video!

This antenna is actually not that bad, definitely fit for purpose. What if it was more centered to actual frequency? Seems like it is dead center on 2.4GHz instead of 2.44, VSWR would be under 2 through the whole bandwidth in that case. I wonder if measuring multiple samples would give you a whole range of center frequencies from 2.4 up to 2.5 or something...

Hi man, I'm working on my telecom masters thesis and I came across your page wanting to understand a bit more about it. Have you wrote any papers or journals that about wave propagation that I can read and cite?

Hey Pete, I would like to work with ya on some educational engineering videos on antennas- I went learned a ton from your antenna-theory website, but can't find out where to contact you. Nm- just found it, dropping you an email.

🔥

If you were a real math teacher, You'd make it seem more complicated.

Thank you - especially for the website

Its good to hear from you Pete!

It's really great to be listening to your antenna theory stuff again! Always leaves me thinking..

I just read the concepts you presented on your website.....concepts were very neat and engagingly presented. Much thanks.

Would you please have the formula to calculate de transmitting frequency of the antenna using the number of spiral, distance between one turn to another and diameter of the cable or wire used to construct the antenna? The intent is construct one for amateur bands (28, 21, 7.5 and 3.5 MHz. Thanks. PU2-UBB

The reason why the Magnetic Field Divergence must be equal to zero is easily understood by looking a iron particles in a magnetic field which shows that ALL magnetic lines of flux that emerge from the source MUST return to that source ! Where as Electric Fields can radiate and diminish based upon the inverse-square law (en.wikipedia.org/wiki/Inverse-square_law)

For the Maxwell equations, the divergence equations are all SCALAR (non-vector) results ; the curl equations are all VECTOR (non-scalar) results. Also the (4) basic Maxwell equations are the work of Oliver Heaviside that reduces the original Maxwell equations from (20) equations with (20) variables down to the form we know of today as the SIMPLIFIED Maxwell equations with (4) equations and (4) variables (en.wikipedia.org/wiki/Oliver_Heaviside#Innovations_and_discoveries).

What would the effects be of having a spiral radial on a vertical antenna?

@ 1:02 Currents in a wire flowing in opposite directions??? in my opinion, this has never been observed in nature, but in Pete's world everything is possible. Pete likes to keep things simple for himself. KZbin shows the best of mankind. Haha. This looks more like it: kzbin.info/www/bejne/Y3eafIyChJl1ock

thanks a lot, i understand the real importance of maxwell' equiations.......