What is Antenna Gain?

[@ruairiokane4464]

Possibly the best explaination I have ever seen on KZbin.

[@akshayaraja1180]

Can’t leave without leaving a comment…best explanation ever👏🏽

[@caseyschesky3708]

Absolutely excellent. Your explanation takes a confusing topic and makes it crystal clear! Thank you!

[@akku6002]

Seriously like never before super awesome thank u so much

[@elmoreglidingclub3030]

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!

[@SzymonAdamus]

That makes it easier to understand. Thanks.

[@nats50]

Beautifully explained! What a textbook failed to do, you simply nailed it! Thanks.

[@vinniec5286]

Simple, elegant, brilliant. Thank you.

[@mubarakahmad7358]

Perfectly Explained for Visual Learners! Thank you.

[@thomask4836]

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!

[@stevenpalmore4299]

Thank you direct and to the point ..everyone should watch your vid before they post anything on you tube

[@StoneFlange]

This is a small fraction in length vs all the other related videos I have watched and at least 10x more informative and understandable

[@charliederanieri1311]

The best explanation I’ve seen, very well done

[@rohitraj-ig8to]

Thank you so much for such a simple and effective explanation🙂

[@mattikankaanpera1979]

Thanks, I've been trying to search the web for just this information, but now I understand what DBI means. 👍

[@saikumarelegant9354]

I saw Best example till now for explaining antenna gain best way of teaching good 😍

[@GokulpkumarGocool]

very good explanation and nice animation.

[@solwise]

+Gokul p kumar Thank you.

[@kennethschultz6465]

Realy Ther is No E I R P

[@xxxXXXCH04XXXxxx]

@@kennethschultz6465 wut

[@mikebleahen7806]

A phenomenal explanation

[@ajayjadhav690]

very nice visualisation....Very good explanation

[@Scotian280]

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.

[@solwise]

Feel free to do that.

[@Scotian280]

@@solwise Thanks :-) by the way.. you can find our company at www.comms-spec.com and out youtube channel at kzbin.info/door/u_mFa5A-cUN9bMObTJKEVwvideos

[@Trucam2020]

Excellent example about the meaning of antenna Gain

[@eagle00881]

Beautiful teaching. Thank you.

[@vitvohralik5557]

Best explanation that exists, thank you a lot

[@echoems]

extremely helpful illustration!

[@Andergrin]

OMG, it's so crystaly clear, excellent explanation

[@VADroidTS555]

This is an excellent explanation, thank you.

[@cocytusdedi6676]

That was an amazing explenation, Thank you very much

[@EMPTYor]

clearest explanation in my life

[@PatrickHoesly]

Thank you! Simple and Fantastic explanation of a complex concept. Well done!

[@zvpunry1971]

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.

[@gaurangnidhitripathi3570]

Thank you so much for sharing your knowledge in such an easy to understand explanation greatly assisted me in my Network plus exam🙏

[@youpattube1]

Thank you very much for this easy to understand analogy.

[@sunilgarg7]

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

[@lteplusplus1225]

can't find best explanation than this.

[@harinathreddy5953]

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

[@reconstructedrichard208]

very good information, thank you

[@walidelhed8195]

very good explanation... thank you

[@sience7791]

such an easy way to understand , very effective

[@PhG1961]

Very well explained ! Congratulations !

[@yourfriendlyneighborhoodfi9904]

Thank you this was the easiest explication to understand by far!!!

[@awaisumar5125]

Superb man...superb

[@BlueRice]

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.

[@learnerdreamer3476]

just amazing. Thank you boss.

[@mtcondie]

This is a great explanation !

[@davidbyrd5065]

Best visualization of gain I have seen. David Byrd KN4BHS

[@rifatislamrakesh]

good and easy explanation. Thanks :)

[@litonmolla6617]

Excellent. Thank you.

[@rrh2918]

Wow, that made a lot click for me.

[@willemb847]

You saved me with this video, thanks kind sir

[@tortuegeniale5878]

amazing explaination. have a great day

[@stevenjosephphoto]

excellent explanation. thank you.

[@ray55558888]

Good example and explanation

[@Yakikitsu]

damn 2019 and this Video is rly good take my like

[@joejoe2618]

excellent explanation!

[@austinevs]

That was beautiful.

[@kristofferr5928]

Thank you!

[@paulschmitterk2pms5]

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?

[@SolwiseMD]

"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.

[@paulschmitterk2pms5]

@@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'.

[@solwise]

@@paulschmitterk2pms5 kzbin.info/www/bejne/qqixh3ivn8d-iLs See our video "Antenna Radiating Patterns explained" for more info on this.

[@illuminaut9148]

Amazing!

[@alzeNL]

really nice clear explanation - thank you !

[@az50056]

superb explanation

[@pd1jdw630]

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.

[@husseinmosleh5008]

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.

[@OthmanAlikhan]

Thanks for the video, that was very helpful =)

[@Avionics2]

Well done!

[@hgraphicspro]

very well explained

[@MrAyam30]

thanks man .. very good explanation .

[@paolocid3391]

Maybe the best video for the (Antenna Gain ) on youtube!

[@saikumarelegant9354]

Please explaining antenna arrays radiation pattern this way

[@ezridr1234]

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.

[@PriyankaSharma-pj3cq]

After gain, will the antenna be Omni directional?

[@philshnieder9188]

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

[@Mustafa-Mahmoud]

Thank you.

[@TheMihirpatel23]

Nice explanation

[@yunan9610]

Its a good explanation, but the equation could provide a better understanding

[@robertorovida2032]

Very nice explanation! Thanks

[@PriyankaSharma-pj3cq]

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!?

[@SolwiseMD]

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.

[@mmdnaderi7183]

best explanation ever thanks

[@jcc2k6]

Excellent explanation, thanks

[@abuabdullah9878]

Thank you so much

[@ajonnet]

What do you mean when you say "3dbi = factor of 2" (at 1:43 sec). Can you please elaborate this more.

[@allend433]

+Amit Jain I had the same question, I ended up doing research on Db (decibel). He uses the wrong term here when he says factor, as that implies multiplication. There is no multiplication involved here. The actual operation in play here is logarithmic. Consider a few things here. Db is comprised of a unit called "bels". the D in Db is from the term "deci", which implies the operation multiplication by 10. Furthermore, standard log operations have a base of 10. With that said, here is how 3 Db = 2: log(2) = x Written another way: 10^x = 2 solve for x I cannot solve this without a calculator, it should be about .3. x = 3 Db Therefore 3Db = 2 (technically log2)

[@paulstephenson486]

Muliplication is definitely involved. The (deci)Bel scale is logarithmic in base10. That is to say that each Bel is a factor of 10. So adding 1 Bel is the same as multiplying by 10, Adding 2 Bels is the same as multiplying by 100. In practice, adding three tenths of a Bel is so close to multiplying by 2 that we think of them as equal.

[@allend433]

+Paul Stephenson Thanks for clearing that up. I think he should have used the term "multiple of 2" instead of "factor of 2". Everything would have made sense from the first time I watched the video if he had phrased it that way. I realize that for people who have very intuitive math minds, these semantics are marginal. My understanding is much more rigid and perhaps a bit brittle. Side note, I recalled how to solve the logs by hand (been a while since i've done math). log(2)=x 10^x = 2 log(10^x) = log(2) xlog(10) = log(2) x = log(2)/log(10)

[@ajonnet]

+Daryl A , Thanks for your explanation. EIRP is was something easy to understand, i wonder why we are using decibels.

[@Duttroid]

thanks for this!

[@hmzszyns5077]

nice animation thanx

[@ZenoDiac]

Yes yes, very goo explanation

[@codybean2981]

I don't get it. Does this have anything to do with my gain knob and if so, what is it doing?

[@khmerann]

Very nice explanation. i still confuse the term "dBi" and "dBm", some wireless adapter state "

[@SolwiseMD]

OK, dBi is a figure which expresses gain over an isotropic antenna (which has a gain of 0dB). dBm expresses a signal power compared to 1mW, so 100mW can be written as 20dBm. I think the video describes the units better than I can in words here. Now, your floors. My video shows operation in free space. Lets imagine the situation of our high gain parabolic light-bulb antenna which focusses all the available power into a pencil-thin beam. Point this out of your window and we might get our signal to the moon. Point it at the floor and we'll get our signal a far as the floor. This brings up two issues: 1. Will our signal go through the floor? Our light-bulb antenna will not penetrate the floor but how will your WiFi signals get on? Well, if your floor is made of concrete you can expect at least 20dB of loss passing through it. If your floors are made of wood and plasterboard expect a loss of 3 to 5dB. (But beware foil-lined plasterboard or insulation which will totally reflect the signal.) 2. What direction should we point our antennas? If we pointed our pencil thin beam of light across the street into our neighbour's window and it landed on his white-painted wall, it would probably illuminate his room quite effectively as the light scattered off his wall. Note that if his wall was painted black the situation would be very different. So the question is: How do our WiFi signals behave in this reflecting/scattering effect? Broadly speaking the effect is similar to light and also dependent on the materials (though not colour). 5GHz WiFi tends to reflect more than 2.4GHz. We should learn from these two effects that raising the gain of indoor antennas is usually fruitless unless we can predict the route the signals will take between the endpoints, which we usually can't. Paul Stephenson.

[@khmerann]

Solwise Paul Well thank you for your explaination, i get your point.

[@DjRockyJSP]

We learnt if we gain more db then directivity will be narrower or less coverage ..

[@alaaalshurufat2998]

mannnnnnnnnnnnnnnny info in simple way thanks a lot

[@gilbertduma9328]

If you now if my right tinhg yuo now

[@yerraDurgaPrasad]

Super explanation

[@guevaradelaserna85]

I did not undestrand the 6 gain,why 6?

[@Nietha-jh6wh]

narrow beam radar detect stukas and v1s approaching english shores

[@erixgutierrez6552]

The fuck did I just watch? was it this easy to explain? you sir have just won a subscriber

[@BigSauceTv]

That means The higher the gain, the lower the degree° coverage?

[@SolwiseMD]

Well, yes.

[@solwise]

Well, yes.

[@mohammadataollahi3035]

awsome explanation

[@reidtillery2856]

Thank you.

[@dahvyee]

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?

[@SolwiseMD]

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 kzbin.info/www/bejne/qqixh3ivn8d-iLs

[@opaextreme9282]

so, question, if an antenna is advertising 22db and another model is saying it/s 17.4dbi, which one has the stronger signal and I should buy for my house ? if the 22db didn't state i or d, then does that mean that you can't really give an answer, cause we don't know what that manufacturer is really saying about it's db gain ?

[@SolwiseMD]

It's not easy to answer this question very well on the information you have provided but I'll have a bash. Firstly you don't say what you want the antenna for. I'm going to guess it is for a 4G data service and answer you qustion on that basis. Firstly 22dB is a very high number. It is a gain of over 100x. That means it will have a very narrow beam-like focus and be choosy about how accurately is is lined up with the mast. Unless you are in a very remote location, better to find something with a lower gain capable of also picking up reflected signals and other masts. This is likely to give better results. See my other video about radiating patters, kzbin.info/www/bejne/qqixh3ivn8d-iLs. OK. What if no units are specified such as 10dB where we might expect 10dBi? I guess generally we can assume if the gain is listed as 10dB we can assume they mean 10dBi. That said, I have frequently seen 10dB used to describe the front to back ratio, which isn't really a gain measurement at all. I've also seen grossly inflated figures claimed, effectively bare-faced lies. All I can really recommend is that you buy your antenna from a reputable source who will discuss your needs with you. I hope that is some help.

[@opaextreme9282]

@@SolwiseMD thx. I was inquiring about ota fortv broadcast stations

[@tixilx]

Excellent +++

[@MujoNovak]

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?

[@SolwiseMD]

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.

[@WAVEZCLUB]

would an increase in DBI greater the risk of getting cancer for a human?

[@SolwiseMD]

If it was at an ionising wavelength yes. Otherwise it might just reduce cooking time.

[@Scrapewithbots]

Superb man

[@JaydenLawson]

Loving the explaination... until mind melted at 1:38. 3dBi = 2... arrgh haha

[@jorge.s3]

awesome