What is Antenna Gain?
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- An informative video on "what is antenna gain?"
At Solwise we offer a wide range of antennas for both indoor and outdoor use.
We have antennas for 2.4GHz, 5GHz and 4G/5G use.
website: www.solwise.co...
Email: sales@solwise.co.uk
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Script and narration by Paul Stephenson.
Animation by Jack Harteveld.
Solwise are an independent technical distribution company based in Hessle UK. All our products are carefully selected to represent the best value for money within their sector. We also understand our products, whether you need help selecting a product before buying, or help to get your system working when it arrives, we will be able to give quality advice. This is because we are a small company and care about your business, as well as ours.
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Possibly the best explaination I have ever seen on TH-cam.
Great Explanation, I see that you guys stopped creating videos, Though I dont know the reason but if you guys have the capability to create a video explanation like this I can see that in future you can create more like this and turn it into a science channel, where people can pay you privately to learn more
Thank you.
👍👍👍
Loving the explaination... until mind melted at 1:38. 3dBi = 2... arrgh haha
Gain is directionality.
Absolutely excellent. Your explanation takes a confusing topic and makes it crystal clear! Thank you!
Seriously like never before super awesome thank u so much
Can’t leave without leaving a comment…best explanation ever👏🏽
That makes it easier to understand. Thanks.
very good explanation and nice animation.
+Gokul p kumar Thank you.
Realy
Ther is No E I R P
@@kennethschultz6465 wut
Thank You so much for taking the time to put this together and explaining it. You really cleared up my understanding and removed some of my previous assumptions! I had an aha moment!
Perfectly Explained for Visual Learners! Thank you.
Thanks, I've been trying to search the web for just this information, but now I understand what DBI means. 👍
damn 2019 and this Video is rly good take my like
Simple, elegant, brilliant. Thank you.
Thank you so much for such a simple and effective explanation🙂
A phenomenal explanation
That was an amazing explenation, Thank you very much
This is a small fraction in length vs all the other related videos I have watched and at least 10x more informative and understandable
Really well presented.. I'm currently putting a lesson together for our sales staff and I hope its ok to show them this video instead of my bumbling though explaining how gain works.
Feel free to do that.
@@solwise Thanks :-)
by the way.. you can find our company at www.comms-spec.com and out youtube channel at th-cam.com/channels/u_mFa5A-cUN9bMObTJKEVw.htmlvideos
Beautifully explained! What a textbook failed to do, you simply nailed it! Thanks.
very good information, thank you
Best explanation that exists, thank you a lot
The best explanation I’ve seen, very well done
This is an excellent explanation, thank you.
narrow beam radar detect stukas and v1s approaching english shores
Thank you!
Beautiful teaching. Thank you.
Thank you! Simple and Fantastic explanation of a complex concept. Well done!
Thank you so much for sharing your knowledge in such an easy to understand explanation greatly assisted me in my Network plus exam🙏
Excellent, quite simple and understandable and this is what we need 👍
Thank you so much.....could you please replace the bulb with patch antenna, that would be more informative ...
We will have a conclusive on how to increase gain while designing the patch antennas ..
Appreciate your help
Ditto to other comments: best explanation of gain I’ve ever seen or heard.
As a university professor, I constantly try to reduce complex theory to simple and intuitive vignettes, just as you have done here.
Thank you!
Superb man...superb
AWESOME POWER Study Aid, CHEERS from Singapore
9V1KM KK7QGL
Amazing!
What about gain on an omni-directional antenna? You can buy a vertical antenna that is unity gain at 1/4 wavelength or one that is 3db gain at 5/8 wavelength. Is the 'gain' then less loss on the longer antenna? Is the 'gain' relative to a 1/4 wavelength antenna?
"Unity gain" is just another way of saying 0dB gain, so a 3dB gain antenna would radiate a more powerful signal within it's effective window. The 1/4 and 5/8 wavelength references are about the trcks used to ensure that the antenna accepts the power from the transmitter rather than reflecting it it back up the wire whilst at the same time forming a suitable radiating pattern that gets the signal to it's recipients.
@@SolwiseMD I realize what unity gain is, but how can a omni-directional antenna actually have gain? Unless it is just referenced to a 1/4 wave antenna as having 0db gain. Antennas are passive devices, so how can they have gain? This video demonstrates a directional antenna where the total rf is being 'focused" in an ever increasingly narrow 'beam'.
@@paulschmitterk2pms5 th-cam.com/video/twNVEyjbKRY/w-d-xo.html See our video "Antenna Radiating Patterns explained" for more info on this.
Yes I'm so glad you could talk to me like I was four years old because I wouldn't get it if you wasn't talking to me like a child
extremely helpful illustration!
got it
Thank you direct and to the point ..everyone should watch your vid before they post anything on you tube
good and easy explanation. Thanks :)
very nice visualisation....Very good explanation
Thank you very much for this easy to understand analogy.
just amazing. Thank you boss.
Very well explained ! Congratulations !
Thank you this was the easiest explication to understand by far!!!
A light bulb isn't an isotropic radiator, because it has a lamp socket which creates a shadow above the lamp and the filament is also not an infinite small point and radiates more light on the side then on its ends. In fact isotropic radiators do not exist, they are just a theoretical construct. Anyway, that's just nitpicking. Everything said was correct and the explanation is a very good one! I use the light bulb analogy myself when I explain this to someone.
Thanks for the video, that was very helpful =)
excellent explanation. thank you.
very good explanation... thank you
I saw Best example till now for explaining antenna gain best way of teaching good 😍
Its a good explanation, but the equation could provide a better understanding
No this is wrong. Youre describing a beam or yagi directional antenna
Sorry !! But ther is No F U K I N G
E I R P !!
No need to apologise, but I don't understand your question.
The fuck did I just watch? was it this easy to explain? you sir have just won a subscriber
OMG, it's so crystaly clear, excellent explanation
Nice animation work you have done here.
You could go true a complete radio amateur course with this animation work and make the boring stuff, less boring.
We learnt if we gain more db then directivity will be narrower or less coverage ..
I did not undestrand the 6 gain,why 6?
After gain, will the antenna be Omni directional?
That was beautiful.
such an easy way to understand , very effective
I don't get it. Does this have anything to do with my gain knob and if so, what is it doing?
Excellent example about the meaning of antenna Gain
Excellent. Thank you.
clearest explanation in my life
You saved me with this video, thanks kind sir
thanks man .. very good explanation .
It needs more views, very idiot friendly.
superb explanation
This is a great explanation !
Good example and explanation
BRILLIANT Explaination, Just BRILLIANT, Thankyou❤🎉
Cheers
9V1KM KK7QGL
Singapore
Thank you.
Bashirian Station
where is antenna? all I can see is light bulb... so if I put 1kW against the wall I can get 2 in opposite direction?
A Light bulb is an antenna. It radiates electromagnetic waves in the visual light part of the spectrum. I have increased it's gain by adding mirrors. A wall might work as a mirror in some parts of the em spectrum but I would suggest a mirror is easier to visualise.
Thank you so so much
Will you be my teacher?
would an increase in DBI greater the risk of getting cancer for a human?
If it was at an ionising wavelength yes. Otherwise it might just reduce cooking time.
Thank you so much
excellent explanation!
Then how would we know by seeing the antenna that which side is it focusing its waves? Will the user need to put receiver antenna in same direction mandatorily as the transmitter antenna has gain in one direction!?
Identifying Orientation: I'm not sure there is a generic answer to this question, antennas come in all shapes and sizes. If it is not obvious try searching for an arrow somewhere on the antenna, otherwise consult the manual.
Selecting Orientation: If the link is point-to-point then the two antennas should be aimed at each other. For point-to-multipoint then the central antenna should be omnidirectional and each endpoint shoul be aimed at that.
Hope that helps.
This site is totally useless to me . I have a hearing problem so videos narrated by someone with an accent is impossible for me to understand.lets go back to written instructions.
I'm sorry for the difficulties you have with our video offering. Our website has lots of education information also, further, feel free to email us with any queries you have - we are always happy to help and advise as best we can. Going forward we are looking at adding subtitles to our videos, they are all 'homemade' so we are learning as we go along.
thank you!
Excellent +++
very well explained
So if it's all about focus, how does a higher gain antenna help if it's the exact same shape?
Like trading the stock unit for a "high gain" antenna that looks pretty much the same.
i used to explain to people that a lot of things in physic can be explain in other type of form using other material or physic to understand it easier. just like if you amp up the power way too much it doesn't really improve the signal as much compare to the antenna itself. it might disrupt the listener. i relate it to screaming. if someone talk normally you can hear the words clearly. but if you scream the words next to your ear, its harder to hear it clearly. in some case, giving too much power disrupt the quality of signal.
awesome
So what if you have a pole antenna that is 8dBi, is it going to be shooting a flat donut shape rather than a tall one?
Basically yes, though 'donut' would better describe the shape in the polar diagram. The radiating pattern itself will just keep getting wider (higher and lower) the further it gets away from the antenna. The angle depends on the gain. The higher the gain, the tighter the angle. You might get a better feel from my "Antenna Radiating Patterns Explained at th-cam.com/video/twNVEyjbKRY/w-d-xo.html
can't find best explanation than this.
thanks a lot for that explanation, i have another question about dBi, it is written on the Antenna, that mean, each Antenna has own dBi.
Well done!
Please explaining antenna arrays radiation pattern this way
amazing explaination. have a great day
Yes yes, very goo explanation
ok so if an antenna has dBi then it's always directed.... if it's not directed it's dB? Why did the name of it change from 0dB when not directed to 3 dBi when directed? Where did the 'i' come from? The isotropic condition you say in the video.... but why not call 0 dB '0dBi' because you still have an isotropic condition... being completely isotropic right? Do you only use dB when there is no gain?
And why is doubling the power 3 dBi and not 2? You said the zero gain is 0 dB then you gained by 2x and called it 3dBi?
Are there any antennas that are jst dB and not dBi? What if I want an antenna that goes equally far behind as forward?
You are getting confused between 'ADDING 3dB' and 'MULTIPLYING by 2'. These two expressions actually mean the same thing (approximately). It's easier to see this using full Bels: 'MULTIPLY by 10' is (exactly) the same as 'ADD 1 Bel', ie 'ADD 10 deciBels', also 'MULTIPLY by 100' is (exactly) the same as 'ADD 2 Bels', ie 'ADD 20 deciBels'. Generally we are talking here about gain or loss so we are comparing two values. To do this in ordinary language we would use words like stronger than, brighter than, louder than etc.. For instance "This antenna is rated at 10dBi, it radiates a signal 10 times stronger than a hypothetical isotropic antenna." It helps to notice that each Bel (or 10 deciBels) you add means an extra zero on the number you started with. You might also check out my "What is a deciBel?" video which some people find usful. Oh, and yes, the 'i' means 'isotropic'. An 'm' would mean '1mW' and a 'W' would mean '1W'. 'A' is used to represent the quietest thing you can hear.
@@SolwiseMD No the answer is that we cannot make an isotropic signal... it's impossible, I found this out later. It's actually 1 dBi not 0. A perfect isotropic signal apprently according to this lecture I watched on antenna gain, is 1 dBi (maybe dB I can't remember now if it was dBi or dB but a perfect isotropic signal would definitely be 1)... no gain. Once I'm told that it makes complete sense.... Mostly about the part that we are unable to make an isotropic signal.. it's not possible.
@@upplsuckimcool16 , I'll have one last go at this for you (and others that may be following). Firstly a gain of 1dB is not 0 (ie no gain) it is 1.25895412, at least that is as close to it as my calculator goes on the input of '10^0.1'. (The formula to convert gain in Bels to linear, rather than logarthmic scale is '10^B'.) 'No Gain' ie. a multiple of 1, is '10^0' ie 0dB. On the subject of the existence of a perfect isotropic antenna I don't really see what your problem is. There is no such thing as a 'perfect' antenna of any sort. It would be interesting to hear back whether the lecture was wrong or just confusing. I'll refer you again to "What is a decibel?". As I type this on TH-cam is has appeared as 'Up Next' at the top right of my screen. It's blue.
@@SolwiseMD what you just ses is just about exactly what i sed
Make another video like this
best explanation ever thanks
narrated - by Sean Bean