Radio Waves

Рет қаралды 1,115,766

TheOnLineEngineer

11 жыл бұрын

What are Radio Waves and how do they work?

Пікірлер: 486

@jenko701 6 жыл бұрын

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

@Oopsie223 6 жыл бұрын

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

@misionesmaderas905 3 жыл бұрын

@صادق حسن التميمي البصراوي aáataayaáyÁpyyaytyyayuay9yyayaaayytaayaytyy0yytólotáóoķoä7ttýatyayaaaaaaaáyaĺñkljjlmvmbmblb00ápa

@davidschmidt6013 5 жыл бұрын

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.

@jpwest 4 жыл бұрын

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!

@igorandradepontocom 8 жыл бұрын

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

@kingbee1500 8 жыл бұрын

Agreed...a fine basic intro to terms and good simple graphics.

@PLA69 4 жыл бұрын

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.

@Varzo11 6 ай бұрын

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!!

@artur19846 5 жыл бұрын

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!

@krishh17 7 жыл бұрын

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

@zengineering6486 4 жыл бұрын

Agreed

@welshpete12 5 жыл бұрын

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 !

@TheOnLineEngineer 11 жыл бұрын

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

@ToolFan68 4 ай бұрын

The earth is flat. The idea that radio waves would need a curved earth to propagate makes no sense.

@evelynesimon5758 7 жыл бұрын

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.

@neventomicic330 8 жыл бұрын

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!!

@giovanniblythe3944 2 жыл бұрын

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?

@jhettish 10 жыл бұрын

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.

@asifpaLash 7 жыл бұрын

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

@numbynumb 7 жыл бұрын

asif iqbaL paLash That's because the signal bounces off the water's surface. It cannot penetrate the water very much.

@asifpaLash 7 жыл бұрын

then why i my music volume on radio get stronger while i am beside a river...

@asifpaLash 7 жыл бұрын

i observed similar incident in many places.

@84bB4 6 жыл бұрын

FM - 11-666

@curtisdesselles8691 7 жыл бұрын

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

@ynagpaul 4 жыл бұрын

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.

@Panzerbeast 7 жыл бұрын

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

@brianshanahan3878 6 жыл бұрын

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! :)

@wa9kzy326 5 жыл бұрын

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.

@mrtracyut 6 жыл бұрын

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.

@Glorybetothelamb 4 жыл бұрын

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!

@pcbona 6 жыл бұрын

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.

@KyzylReap 11 жыл бұрын

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.

@pranitashewale3177 8 жыл бұрын

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.

@MartinTedder 4 жыл бұрын

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

@jtownshend 7 жыл бұрын

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

@VintageLabSilvioPinheiro 10 жыл бұрын

simple and sharpen explanations ... Very good 73

@Xioxio000 10 жыл бұрын

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

@wadepatton2433 6 жыл бұрын

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.

@dougelick8397 6 жыл бұрын

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

@wittech8795 8 жыл бұрын

Excellent ! thank you for sharing this

@enzed1190 4 жыл бұрын

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

@rafaellastracom6411 6 жыл бұрын

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

@subhashchanderjain9265 6 жыл бұрын

Outstanding Video. Concepts explained in simple way.

@AnylaAdemaj 10 жыл бұрын

so simple, yet so helpful ... thnx!

@TheOnLineEngineer 11 жыл бұрын

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.

@Loady420 7 жыл бұрын

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.

@Jakefrc 10 жыл бұрын

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. :-)

@Grossschwartz 7 жыл бұрын

Thank you very much for publishing this video. Great Help

@chrischarters376 5 жыл бұрын

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!

@trevorflama6825 8 жыл бұрын

wow!I been missing this..this excellent

@Supermakfamily 8 жыл бұрын

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

@pinklemonade2014 5 жыл бұрын

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

@sabaudzilauri7307 3 жыл бұрын

Absolutely the best video on this subject!

@rashidalinawaz9033 7 жыл бұрын

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.

@hemanthsiripireddy8717 6 жыл бұрын

Outstanding vedio & interesting &l like it

@Victoria-if8ep 4 жыл бұрын

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

@hanestshirtsarecool 3 жыл бұрын

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

@meyou9655 3 жыл бұрын

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

@frankm2022 5 жыл бұрын

Great job! Very clear easy to comprehend.

@Julillo24 2 жыл бұрын

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

@pranavinalla5299 7 жыл бұрын

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

@jorgeriverajr1745 5 жыл бұрын

Just amazing, thank you!!!

@cindyheinrich9821 2 жыл бұрын

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

@matthewjameswalker721 5 жыл бұрын

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

@mrflashhd7088 10 жыл бұрын

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

@bennyhaastrup7369 10 жыл бұрын

Very clear and good video; thank you!

@bigfist855 5 жыл бұрын

Thanks for your hard work Best vedio on KZfaq

@FatmaSamyFAS 10 жыл бұрын

Great introductory video 👍👍

@user-mr3mf8lo7y Жыл бұрын

Great explanation. Much obliged.

@reyasentista4044 4 жыл бұрын

amazing presentation. very well presented.

@MrM2hb 8 жыл бұрын

Great video. Thanks for doing it.

@magnitudematrix2653 2 ай бұрын

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.

@NoosaHeads 4 жыл бұрын

Excellent presentation.

@DavidVine-DOCVIDPRO 5 ай бұрын

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

@philrogers4535 3 жыл бұрын

What an awesome video! Thanks.

@suchagul4340 8 жыл бұрын

Very useful comprehensive video, Thanks.

@jaskiratkaur8602 10 жыл бұрын

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

@greggaieck4808 Жыл бұрын

The on line engineer I like your utube videos are awesome

@hamzasiddiqui4928 7 жыл бұрын

Understood it easily with the great explanation

@alberthuang7710 6 жыл бұрын

Great presentation!!

@ashwanidhiman9186 10 жыл бұрын

fabulous video! Appreciations:)

@philorkill 5 жыл бұрын

Great explanation. Thank you!

@Forwardoperationbase 6 жыл бұрын

Wow! Loved the video!

@TheOnLineEngineer 10 жыл бұрын

As far as I know there is no harm to using your cel phone. The recommendations I mentioned are just common sense precautions that anyone can take if they are worried about their RF exposure.Like I mentioned before, we are surrounded by RF signals everyday, from the devices we use to the cel towers we pass by, the police radio, WiFi hot spots in McDonalds and so on. There is no number I can give you, if you are concerned then do what you can to limit your use of your cel phone, thats it.

@allenmiddendorff2068 2 жыл бұрын

Nicely done.

@rmgross3942 11 жыл бұрын

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

@Runtothemusic 10 жыл бұрын

Well done...very informative. Thank you.

@Mukeshmiktecrep 8 жыл бұрын

Well described and good video

@mahmoodtariq7535 11 ай бұрын

Very nicely and detailed demonstrated.

@Swede4Trump 4 жыл бұрын

Greetings from Sweden 🇸🇪 Awesome explanation! You just got yourself a new subscriber 🤖

@PratikPrajapati84 10 жыл бұрын

Awesome.. Thanks for making this video.

@kshitijwagle6801 7 жыл бұрын

excellent animation with explanation ! thank you sir. !

@yoramstein 4 жыл бұрын

Great simple to understand video.

@frankreiserm.s.8039 4 жыл бұрын

The tallest antenna was the Warsaw antella at 2,120 feet, but it collapsed. Today, the tallest antenna is the Tokyo Skytree antenna at 2,080 feet. In Ontario, Canada, the CN Tower, standing at 1,815 feet, is an antenna that also serves as an observation tower for people. The smallest antenna is only 14 mm by 11 mm. This was a great video. They should have mentioned the layers of the atmosphere, identified by capital letters (D, E, F1 and F2, increasing in height in the ionosphere), which reflect radio waves, and are different between day and night. For example, only during the night does the D layer reflect back to Earth SW radio waves, such as 2 meters to 80 meters, used for continuous-wave communication (Morse Code) by radio (Ham) operators. Frank Reiser M.S. KB2VNG Frank Reiser Video/Audio Service Caldwell, NJ., U.S.A. (973) 226-3476

@tabiambaya100 4 жыл бұрын

That is resourceful. thanking you

@chocholatemilkshake4799 3 жыл бұрын

Amazing job

@simran_kaur963 7 жыл бұрын

very informative long lasting information

@mayurbalwani7277 7 жыл бұрын

Best tutorial! Thank you very much!

@LPArabia 11 жыл бұрын

Very well presented. Thank you!

@jaredturner3063 9 жыл бұрын

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?

@Cepheid_ 6 жыл бұрын

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.

@kg6qzx 6 жыл бұрын

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.

@tinkeringengr 5 жыл бұрын

A degree is fundamentally useless. Use the internet.

@mcie6306 3 жыл бұрын

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

@samanthacheng2486 5 жыл бұрын

good video and good animations. Thank you!

@TheOnLineEngineer 11 жыл бұрын

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