If you're interested in radio, this is the best video I've found to start out.

I am glad you and your students found my video tutorial useful. Thanks for your kind words. Russ

Absolutely the best qualitative antenna video out there. You hit all the main points.

Fantastic vid. I was trained in Strategic Microwave Communications Systems Repair (26V20) years ago in the Army. Late 70s. They never had a vid as clear as this. Sure would have helped. Now I teach Middle School Science, and when we get to the sections on Energy, Electricity and Magnetism, I use vids like these to get the principles across to the kids. Thank you for taking the time to create and share this vid.

a must watch video for everyone trying to get into RF. many basic topics clearly explained. thank you !!

Excellent ! thank you for sharing this

Outstanding video. I plan to require my employees (who are not trained technicians) to view this to give them a few more things to think about. I've had a ham license for 53 years and have been in the two-way and broadcast services industry for 42 years. I've been in business 31 years and I didn't know about the "solar winds" night time effect on the Ionosphere. There's always some thing new to learn before we ending up leaving this rock.

This is also one of the best videos about radio in general and broadcast in particular that I have seen. I already took a few screen shots of it for a presentation that I made about radio relay systems for a sales colleague. I am RF system specialist, engineer and long time licensed ham as OZ7ACS too. I am trying to teach electronics and RF to my son and then I stumbled upon this excellent video. Keep up the good work and please make more videos like this one about more subjects within RF and antennas!

For explanatory purposes, I like the optical engineer's view of RF; photons coming off the antenna in response to the varying AC driving voltage. As the driving voltage builds, it excites the conduction electrons into a higher orbit, and when it drops the electrons return to a more stable orbit, releasing their energy in the form of a photon at the frequency of the driving voltage. The photons, traveling from the antenna, are picked up by the receiving antenna and induce a voltage in the antenna elements.

This is a very very helpful video, clarified most of the issues I haven't been able to understanding for years. Thank you so much.

I searched through numerous videos looking to understand radio waves and antenna length and by far this is the best video I found. Thank you so much for making this video!!

This one single video is more informative than hundreds of articles about radiowaves I've ever read! I had no idea that radio waves had polarity! Thanx a lot!

This video is really great. I am astrophysicist (working in optical and infra-red astronomy) who will go observe soon with a large radio telescope, thus I needed to learn as much as possible about radio stuff (telescopes, antenna, polarization, receivers,...). This video really helps. Thanks!!

Excellent , the best explanation I have ever seen . I'm an ignoramus when it come to how radio works . And you have helped me a lot to understand how it works . Thank you for posting !

This is best video on radio that I have ever seen. Excellent work!

The best video about this issue I have saw. Congrats!

Just amazing, thank you!!!

Excellent video, narration and animationns! This is EXTEMELY helpful for me to send to my sons who I am getting into Ham / Amateur radio! Thanks so much and keep them comming! :)

simple and sharpen explanations ... Very good 73

Brilliant video. Don't know why anyone would not like this.

11:02 is what makes world wide radio contacts a regular thing for Amateurs and Broadcast stations. It's a bit more complicated than presented here and many more factors play into it. The lower frequencies are more predictable and the higher ones can be "magic" hence the "Magic Band" of 6 meters (50-54mHz in USA). Enhanced propagation is what makes things exciting on the amateur bands.

so simple, yet so helpful ... thnx!

wow!I been missing this..this excellent

An excellent video with many good animations. I imagine you took quite a long time and a lot of effort to add so many animations to your slides.

Outstanding! It’s unimaginable that the radio frequency waves travel at the same speed as the speed of light. Thanks for all this Good information.

I have looked all over the place for some explanation about radio polarization. Especially what circular polarization is. Never would've thought i'd find the answer in a youtube video. Very detailed information in your video, thank you very much.

Thank you for this very lively and informative video, I now understand RF a lot better than I did before watching. Good job!

This is very well done. Clear, paced well, good animations. I used it as part of my College for Kids class on amateur radio. Thanks.

Outstanding Video. Concepts explained in simple way.

Excellent.

Thank you very much for publishing this video. Great Help

Brilliant! This is the best informational video I have ever watched on you tube! Very easy to understand!!! Radio waves have been difficult for me to grasp but this video helped me under stand soooooo much! Thank you sooooooo much!

Great job! Very clear easy to comprehend.

a brief but lucid tutorial. thank you for posting it.

I´ve been thinking about this video for a while now. Thanks!

This video was really helpful. Instead of reading about radio wave watching this video was much worth. I wish it could have been in much deeper way.

Came for clear information, received clear information. Thanks for making me smarter today.

Excellent video. Best one I've seen so far. Many thanks!

Great work. Clarified why I would like to have a circularly polarized yagi for satelllite work.

Great explanation. Thank you!

Awesome video! Thanks heaps for putting the time in to make it. You've helped me understand the way radio waves behave a lot better. :-)

its so organized and useful, thanks so much for making this

Absolutely the best video on this subject!

Excellent presentation.

Perfect!

Excellent! Thank you!

As a young ham i used to love 'sporadic E' some summer nights to talk up to 100's km's on my 2 metre homebrew. The E layer in the ionoshere sometimes ionizes in a way that VHF signals would bounce off it thereby effectively lengthening the horizon, sometimes for seconds or minutes occasionally for hours lol. In the 1970's govt's published prediction tables for HF propagation over DX, as different bands fron 3 to 30mhz would bounce repeately at different times. This enabled os staff to warm up the next Tx ready for opening, to keep those RTTY's going. Music to my ears!

Very clear and good video; thank you!

amazing presentation. very well presented.

I believe the crossed polarity as you've described is "dual polarity". Circular polarity is when the horizontal and vertical signals are out of phase and create a rotation in the polarity. A spin stabilized satellite most clearly demonstrates how circular polarization works. This WIKI has an excellent graphic and explanation: en.wikipedia.org/wiki/Circular_polarization

Excellent, Excellent, Excellent!!!! Well done video

Great presentation!!

Very well presented. Thank you!

Very well explained! A really great video, with very useful information. Congrats!

Thank you. Good work.

Best tutorial! Thank you very much!

Brilliant. Thanks a ton.

Great video. Thanks for doing it.

wow, thank you. literally everything I wanted to know regarding this subject was answered in this video.

Great explanation. Much obliged.

Very nicely and detailed demonstrated.

Very useful information and done in a very understandable way. Thank you.

fabulous video! Appreciations:)

Well done...very informative. Thank you.

Outstanding vedio & interesting &l like it

Not sure about anyone else. This was very helpful on understanding how to use my RC to pilot my drone much farther I didn't understand that I had to be pointing my flat panels at the craft.

perfect lesson. Thank you

Nicely done.

Where was this in 1992, when I really needed it. Books and more books.

Awesome.. Thanks for making this video.

Awesome, very informative. I have got many answers to the questions that i used to think when i was a kid haha. Thanks for sharing and making this wonderful and informative visualization about Radio Waves.

Amazing, thank you

What an awesome video! Thanks.

Thanks, this really helped on some school work I was doing recently! :)

Great simple to understand video.

Well described and good video

Amazing job

simple and on point

Thank you Mr OLE

Just as an additional note - EM waves may be harmful if the radiation intensity is large enough (so-called "thermal effects"), but the health effects when exposed to EM waves also depends on the characteristics of the waveform which is transmitted. A number of studies have been performed to research the effects of EM waves, particularly with center frequencies used in cellular and Wi-Fi, combined with the actual waveforms to determine whether the exposure has any effect on mammalian health. Some of these studies have shown that these particular center frequencies and waveforms are coupled to e.g. VGCC activation in cells - but don't take my word for it - go ahead and read the research papers!

Easy to understand, and information shared at a good speed.

great video, valuable informations thank you (y)

Great introductory video 👍👍

awesome video.!. thank u so much for uploading :)

This is an EXCELLENT educational video. My only suggestion two 7+ minutes long Parts 1 & 2. Thank you.

Simple, but powerfull, very didactic, better than many of our university teachers, best regards from Colombia OnLineEngineer

Thank you, Sir

Thanks for this!

Understood it easily with the great explanation

Wow! Loved the video!

Nice! Thank you.

well explained sir. now i am doing a project on designing an antenna. your video helped me alot.

very good description.

That is resourceful. thanking you

Excellent production! 73 de AC6GM!

Excellent!

what a great video !!! ,thank you so much

Very useful comprehensive video, Thanks.

Thank you.

excellent animation with explanation ! thank you sir. !