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!
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!
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 !
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.
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!!
What happens to the electrical signal as it reaches the radio wave? Does it generates a high frequency electrical signals and low voltage or maybe I'm mistaken?
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! :)
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!
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.
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.
water blocks radio signal is not true. actually water carries rf further. when ever i go beside a river or lake or sea i get stronger signal than other places. i think they need a more to discover
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.
Dishes are used for very high frequencies, in the Gigahertz. The parabolic shape of the dish focuses the high frequencies into a very tight beam, this allows almost all the energy to be directed in one direction. When receiving the dish again focuses the received signal and amplifies it. Dishes work with both horizontal, vertical and circular polarized RF.
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.
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
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!
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.
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.
I get it. You are matching antenna geometry to a holographic radio image in space to tune the frequency in space. Capacitance, reflectance and phase make space. Excellent video.
Thank you for the awesome video. Very interesting. If you have the time will you make a complimentary video explaining how the information is actually encoded into the wave?
Signal processing can get complicated fast. If you are interested in some of the math behind it, look at 3blue1brown's video on Fourier transform, explains the topic amazingly. I haven't seen a good video explaining signal encoding yet so I'm all ears for recomendations.
It’s called modulation and can require the understanding of circuit design but a very simple explanation is that bandwidth is directly proportional to the frequency of a carrier (or transmit frequency). The higher the frequency the more available bandwidth (BW). The information is “modulated” onto the carrier via a circuit called a “mixer”. The information can never exceed the BW or the carrier frequency. The trade off is that higher frequencies become much more directional and tend to experience higher propagation loss. Microwave signals need to have the antennas directly lined up for maximum transmission. This video does a good job of relating basic RF and mW antenna propagation. If you like math and are interested in this topic Engineering is a fascinating career path and is well worth the effort to get a degree in Electrical Engineering. All it takes is a desire to learn. I’ve been an Engineer for 30 years and still learn new things all the time. Not trying to preach but a degree will serve you very well over a lifetime.
Mostly its the size and shape of the antenna that affects how much of a frequency it absorbs or emits. A wire strung out will transmit and receive a number of frequencies but not very efficiently, nor with any directivity. Sizing and shaping an antenna allows it to resonate more easily with a smaller range of frequencies and its shape lets it direct the area or pattern it transmits to or receives from. For transmit antennas they get bigger as the power they transmit increases. Hope this helps
Hi ! Nice video!! I want to ask you... if I only care about the receiving signals (don’t care about transmitting) would I have to prefer a high dbi antenna or a medium?? Is higher dbi antenna more sensitive to receive??? Thank you in advance
I am glad you and your students found my video tutorial useful. Thanks for your kind words. Russ
The earth is flat. The idea that radio waves would need a curved earth to propagate makes no sense.
Absolutely the best qualitative antenna video out there. You hit all the main points.
If you're interested in radio, this is the best video I've found to start out.
@صادق حسن التميمي البصراوي aáataayaáyÁpyyaytyyayuay9yyayaaayytaayaytyy0yytólotáóoķoä7ttýatyayaaaaaaaáyaĺñkljjlmvmbmblb00ápa
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!
The best video about this issue I have saw. Congrats!
Agreed...a fine basic intro to terms and good simple graphics.
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.
This is best video on radio that I have ever seen. Excellent work!
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!
a must watch video for everyone trying to get into RF. many basic topics clearly explained. thank you !!
Agreed
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 !
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.
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!!
What happens to the electrical signal as it reaches the radio wave? Does it generates a high frequency electrical signals and low voltage or maybe I'm mistaken?
Excellent ! thank you for sharing this
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.
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! :)
Thank you for this very lively and informative video, I now understand RF a lot better than I did before watching. Good job!
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.
Excellent video. Best one I've seen so far. Many thanks!
Brilliant video. Don't know why anyone would not like this.
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!
I know it's a lot to learn but this is the first step for people to understand how 5G works instead of being afraid of it.
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.
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.
simple and sharpen explanations ... Very good
73
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.
water blocks radio signal is not true. actually water carries rf further. when ever i go beside a river or lake or sea i get stronger signal than other places. i think they need a more to discover
asif iqbaL paLash That's because the signal bounces off the water's surface. It cannot penetrate the water very much.
then why i my music volume on radio get stronger while i am beside a river...
i observed similar incident in many places.
FM - 11-666
wow!I been missing this..this excellent
Outstanding Video. Concepts explained in simple way.
so simple, yet so helpful ... thnx!
Came for clear information, received clear information. Thanks for making me smarter today.
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.
Thank you very much for publishing this video. Great Help
its so organized and useful, thanks so much for making this
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. :-)
Dishes are used for very high frequencies, in the Gigahertz. The parabolic shape of the dish focuses the high frequencies into a very tight beam, this allows almost all the energy to be directed in one direction. When receiving the dish again focuses the received signal and amplifies it. Dishes work with both horizontal, vertical and circular polarized RF.
wow, thank you. literally everything I wanted to know regarding this subject was answered in this video.
a brief but lucid tutorial. thank you for posting it.
Just amazing, thank you!!!
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.
Very well explained! A really great video, with very useful information. Congrats!
Absolutely the best video on this subject!
Great job! Very clear easy to comprehend.
Great work. Clarified why I would like to have a circularly polarized yagi for satelllite work.
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
amazing presentation. very well presented.
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 useful information and done in a very understandable way. Thank you.
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.
Where was this in 1992, when I really needed it. Books and more books.
well explained sir. now i am doing a project on designing an antenna. your video helped me alot.
Excellent presentation.
Simple, but powerfull, very didactic, better than many of our university teachers, best regards from Colombia OnLineEngineer
Thanks, this really helped on some school work I was doing recently! :)
Outstanding vedio & interesting &l like it
Excellent, Excellent, Excellent!!!! Well done video
Very clear and good video; thank you!
Great video. Thanks for doing it.
Great explanation. Thank you!
Great introductory 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.
Very useful comprehensive video, Thanks.
Great presentation!!
Understood it easily with the great explanation
fabulous video! Appreciations:)
awesome video.!. thank u so much for uploading :)
I get it. You are matching antenna geometry to a holographic radio image in space to tune the frequency in space. Capacitance, reflectance and phase make space. Excellent video.
Great explanation. Much obliged.
Easy to understand, and information shared at a good speed.
Thanks for your hard work
Best vedio on CZcams
What an awesome video! Thanks.
Great simple to understand video.
excellent animation with explanation ! thank you sir. !
Nicely done.
Well done...very informative. Thank you.
Awesome.. Thanks for making this video.
This is an EXCELLENT educational video. My only suggestion two 7+ minutes long Parts 1 & 2. Thank you.
Amazing job
Best tutorial!
Thank you very much!
Well described and good video
Wow! Loved the video!
Very nicely and detailed demonstrated.
Thank you for the awesome video. Very interesting. If you have the time will you make a complimentary video explaining how the information is actually encoded into the wave?
Signal processing can get complicated fast. If you are interested in some of the math behind it, look at 3blue1brown's video on Fourier transform, explains the topic amazingly. I haven't seen a good video explaining signal encoding yet so I'm all ears for recomendations.
It’s called modulation and can require the understanding of circuit design but a very simple explanation is that bandwidth is directly proportional to the frequency of a carrier (or transmit frequency). The higher the frequency the more available bandwidth (BW). The information is “modulated” onto the carrier via a circuit called a “mixer”. The information can never exceed the BW or the carrier frequency. The trade off is that higher frequencies become much more directional and tend to experience higher propagation loss. Microwave signals need to have the antennas directly lined up for maximum transmission. This video does a good job of relating basic RF and mW antenna propagation. If you like math and are interested in this topic Engineering is a fascinating career path and is well worth the effort to get a degree in Electrical Engineering. All it takes is a desire to learn. I’ve been an Engineer for 30 years and still learn new things all the time. Not trying to preach but a degree will serve you very well over a lifetime.
A degree is fundamentally useless. Use the internet.
great video, valuable informations thank you (y)
Greetings from Sweden 🇸🇪
Awesome explanation!
You just got yourself a new subscriber 🤖
Excellent.
Very well presented. Thank you!
very good presentation.
good video and good animations. Thank you!
Mostly its the size and shape of the antenna that affects how much of a frequency it absorbs or emits. A wire strung out will transmit and receive a number of frequencies but not very efficiently, nor with any directivity. Sizing and shaping an antenna allows it to resonate more easily with a smaller range of frequencies and its shape lets it direct the area or pattern it transmits to or receives from. For transmit antennas they get bigger as the power they transmit increases. Hope this helps
Just awesome video! opened many whats-thats for a newbie. like circular polarisation
Thanks for this useful information.
Hi ! Nice video!! I want to ask you... if I only care about the receiving signals (don’t care about transmitting) would I have to prefer a high dbi antenna or a medium?? Is higher dbi antenna more sensitive to receive??? Thank you in advance
Excellent production! 73 de AC6GM!
Thank you. Good work.
very good description.
Very useful video! Thank you!
perfect lesson. Thank you
such excellent explanation! thanks!!!