RF power versus antenna gain (the results may shock you)
ฝัง
- เผยแพร่เมื่อ 20 ก.ค. 2018
- Today I talk about RF power versus antenna gain for FPV systems on RC planes and drones -- the results may shock you. Another whiteboard video with some "in the field" footage to prove the point.
Here is an earlier video which explains how antenna gain works:
• FPV antenna gain and r... - วิทยาศาสตร์และเทคโนโลยี
![ถ้าพี่วุ้นท้อง แป้งจะท้องไปด้วยกัน !!!! [ดูคลิปเต็มหน้าช่อง] #Short | PANG ORNHIRA](http://i.ytimg.com/vi/FeyEnVMwitA/mqdefault.jpg)
Almost to the limits of visual line of sight.. lol love it.
That cracked me up ahah
The use of balloons in this video is genius.
I wish he used balloons filled with hydrogen, though.
I agree, using balloons to explain the inverse square law is a stroke of genius!
@@rivrunner1 I agree, it was an excellent demonstration. I did wonder what the balloon resistance to being inflated did as it was increasingly pressurized, I imagine it went up, but I don't think the results would have been much different if it had been linear.
Get in there Bruce! Your audience loves you and speaking as an electrical engineer, your videos are the best and most informative video's on youtube.
I'm not an engineer, but I couldn't agree with you more. Invaluable knowledge for free. How no to love it?
Bruce, can i adopt you to be my grandfather
Bruce, you're the professor I wish I had in college. What a great job. Thank you.
This vid is exactly what I needed to clearly understand how this works. Thanks for the detailed but not overly complex tutorial!
Thank you Bruce! Once again. This hobby would not be the same without you and all you do for the community
Videos like this are what have kept me watching your channel. Learning physics and electronics in such a practical application way is inspiring. Thank you.
Bruce, this may be the best side by side comparison I have seen. So many things we do make just little differences. Like the antenna test I just did. But your test here very clearly shows the difference. Would love to seen done with some more antenna.
HELLO, DoneRacer101!
This is the moment i've been waiting for bruce to explain between power and gain... nice one bruce!
Thank you for sharing this valuable knowledge with us, Bruce! Now this is exactly why I like your channel so much!
Excellent demonstration of the distribution of transmitter power when using omni directional anntennas.
I don't have an RC plane/drone, but still found this really helpful for general RF theory. Thank you for uploading
As always Bruce another amazingly informative video. Thank you so much for everything you do for this hobby and in sharing all your knowledge and experience. Long may it continue xx
Great to have you back looking forward to the build video.
thank you...i learned something: isotropic antenna and why u need it. And your presentation is very addictive, the more I listen the more question I have, and leading to me listening more of it.
Bruce you are the best.Better then the rest.No matter what they say.Thank you!I think we need to educate ourselves on the subject of frequencies in order to keep the hobbyist of FPV alive.Thank you!
Great timing. My group is currently trying to get our best signals and powers so we can fly together. As one of the guys tasked with understanding this stuff, your videos lay it out in a way I can understand. Thanks Bruce !!
Bruce you are an incredible teacher
Great video Bruce! Glad you made it back to the whiteboard - I’m using two five-turn helicals on my diversity goggles - pointed about 60 degrees away from each other. Marvelous range and coverage!!!
You just taught me a lot of important things that I never heard of, but really needed to know. Thank you!
Brilliant discussion, Bruce! Thank you!
Mate thanks for all this information! Fellow NZ fpv'er here 🖖😌👌 may the force be with you! Always
I am a short wave DXer. So I find your dissertation on RF propagation to be informative. Please continue.
Great video, perfect balance between technical information and practical explanations. Now I understand much better about antennas!
This guy should be teaching classes! Great energy and inspiring way to teach.
This is such a great video! I can't believe there are dingbats out there who disliked it. What is there to dislike? Someone is taking their time to educate and explain (really well!) a fairly complex area of RF communications. Well done mate and thank you. Looking forward to more videos!
Thanks for everything you do Bruce your the reason I got into this hobby. Keep on kicking
I'm not a RC person (yet), but I'm learning to get my HAM license, so these videos help me a lot, thanks professor!
That’s why I’m here and his instruction is invaluable!
Theory is always good, I've learned something new today. Thanks Bruce!
I’m about to start my junior year for Electrical Engineering with a focus on RF. These are great videos, thanks!
Thank you for your explanation. I've been trying to understand this for awhile in been looking at videos that do not explain it the way you do.
Great video as always ! Keep up the good work.
This is great Bruce. I admit I was power hungry, this really puts it into perspective.
Im looking forward to making my own! Thanks Bruce!
Excellent demonstration.
Great Video Bruce, now looking forward to your build video of those two antennae.
I'll be waiting for that antenna build video. Great video and explanation.
This channel is everything I was looking for and more.
That was a very educational video Bruce I look forward's to the antenna build thanks
Thanks some of the best explanation of antenna theory and practice also applicable outside of the RC hobby
Best teacher ever! Greetz from Germany 🙂
I am excited to learn more and build. Can't wait. Thanks Bruce!
Bruce is a genius! Best educational videos on the tubes
Oh my god! I learn something today. Your explanation is simple and neat. I see you got a lot of explanation video and I'm going to watch one by one definitely. Thank you for your effort!
Looking forward to the build video! Great job as always and thank you
Waiting in anticipation for the DIY Helical antenna build Video.
Great video Bruce - white board power!
Cant wait to build the helical antenna
Another awesome white board lesson. Thanks Bruce.
LOVE a good white board video in the morning.....All right.... got my tea... ready.....Got it Bruce.... Thanks Mate...
Very informative, thanks for the video. Looking forward to the DIY helical antenna video.
Excellent video Bruce. You deserve a subscription. I'm keen for that helical build video!
Thanks for another great whiteboard video! Even though I was already aware of the content this time, it was still amusing as always.
That's the best lecture in my life! Wish you were my teacher at the university!
Bruce...from North Carolina/Puerto Rico....thank you.!! amazing video.
Bruce without you we would be sheep following the crowd thank you for this fantastic video again you make this hobby so much easier to get a fantastic result 👍🏻👍🏻and you 🤘🏻🤘🏻🤘🏻🤘🏻🤘🏻
Hi Bruce, Its been about a year since I was watching your videos but got back into quads this summer. Another great video and glad to see you are busy flying as always. Thanks again !
Also I love that you have a 'head tracking head' 10:40
Great videos! helped me understand the remote control system used on the locomotives I work on as I am an electrician with no RF background knowledge !
Hello from California! Great information and video. Thank you so much.
Great information! I typically use a 50mw SP Antenna on the transmitter an receiver and fly close proximity (within 200m) and very rarely get video drop-outs. Yes, I would much rather use a better antenna and save that battery power for flight. Thanks for the video and Happy Flying!
The fcc is after hobbyking for selling transmitters that produce power levels beyond 1w (1000mw) and can broadcast on non approved frequencies. The majority of us purchase and use products with in the the fcc limits. It is a thing but not the end of the world thing for most of us.
Bruce, you're awesome.
Thankyou for being in this hobby
Wow
I really missed your videos.
Very informative and easy to understand. Good job!
Ps. Every time a friend ask me about pid I sent your video.
Bring on the antenna build video!! Also, can you do a vid on the ways in which objects between the vtx and rx affect the video reception and how best to overcome them?
Cant wait for the how to video! I would like build one today. Thank you..
Love the balloon analogy!!
Yes yes yes!!! I understand now what to look for when buying/making antennas and it wasn’t that hard to understand....now I’m off to your other video on how to make and antenna
VERY informative I really like this type of videos you make
Looking forward to the antenna build!👍🛩🛠
What a very good job you did here!!!
I am able to understand your concepts since I am a licensed aeronautical radiotelephone (restricted) user and I have studied various concepts related to radios. I also have a lot of interest in networking.
Fantastic video Bruce! Thanks 😀
Camera image is looking really good today. And as always a great vid!
Love learning from you Bruce. Can't wait to build a helical with you!
Love the way you explain.
Thanks
Thanks, Bruce. Love the dry erase lessons! 👍
Great as usual ! Can't wait to make my own helical antenna !
Nice and simple explain. Thx for another great review
You are great, thanks for this vid, great information, very symphatic. Didn´t know this stuff.
Wish you the best and keep on.
Brilliantly explained. Thank you.
Thank you Bruce, that helped me lots.
The usual great stuff, thanks Bruce !
Exelent lesson. Thanks Bruce.
Thank You So much! You just helped solve a problem in my product
Thanks mate, looking forward to making an antenna with you.
Looking forward to your build video.
This was really easy to understand
Great video. Looking forward to the making helicoils one 👍
the antenna was the problem the whole time! dang... i could never get far with my 200mw setup, but i was running an omni on my rx... if/when i get back into rc flight, ill have to get a helical and see (haha) what difference it makes :) cheers Bruce! thanks for the video!
I seriously need to design you a housing for those antennas... Great video!
Excellent video. I've heard plenty on helical's, but never explained as well as you have! I'm just getting into fpv and I probably have one of those HK vtx's in question, although I do believe it can be set to a lower power to keep things "under the radar"
This so true
I changed my quad vtx because become defective. So I decided to buy one that is 500mw( the old one was 100 mw) and I don't feel any real gain ( only more heat ) Antenna is most important
Thanks for great information
Another awesome video - Thanks so much!
Thank you very much for a very understandable informative video!!!!
I love the white board ! ...& Bruce is likeable as well.
First Video i have seen and i subscribed !! Brilliance
Cant wait for the antenna build!
I fly model rockets, but your info is grand, Bruce!
Great video. Thanks.
Hi Bruce , great informative video of which I learned more, so thanks! I have a question. When using directional antennas, I've been wondering if it would theoretically be possible to produce an OSD which might put an indicator on the screen, advising you which way to turn your body to optimise your position in relation to your model in flight? I know nothing of whether this can be created, but think it would be a great tool to use in this scenario? Any electronics wizards think this is possible? The idea has been kicking around my mind for ages. Cheers!