Dual Band WiFi Antenna How do they Work?

In this video we take a look at some examples of dual band wifi antennas for 2.4 and 5 GHz. I will do a follow up video to this using the network analyser.
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[@bjornfuchs3129]

I make my antennas by my self in the way you can see the dipol antenna at the beginning of the video. I use 5mm brass tubes to make them. I do this to make them working from 2.400 ghz to 2.500 ghz SWR= 1.1 to 1.3. I use them on my race quad copters. The range of my quads with this antennas is about 4km and I still have 30% rssi. It´s amazing how good antennas can improof the range !

[@Grey-Troll]

Thank you! I was struggling to understand these dual-band antennas in the pursuit of optimizing wifi coverage. Sometimes its easier to listen to someone explain it like this instead of reading a huge paper on it and having your eyes cross and start snoring before you get done 😆 Not that I won't still read up on it at some point... but now it will make more sense when I do.

[@slybunda]

and here is me thinking a coat hanger can be used as an awesome antenna lol. not just a bit of wire, far more complexity and thought gone into the design of these antennas.

[@RickGreenPhoto]

Stacked dipole antennas by definition are collinear as you show in 5:02. The "coil" between is actually a matched feed line for the 2 dipoles. No ham I know calls a coaxial dipole a collinear its just a dipole when you hold it upright its a vertical dipole if you hold it parallel with the planet it is now horizontally polarized. 73 N3KCA ..

[@armstrongskyview2810]

Fantastic video, I've just ordered 6 of the first pcb antenna for my mesh network.

[@DerghamWolf]

The router has more than one antenna One of the antennas 5.8G, there is a connection to the ground that gives a beeping sound. How do I cancel this antenna I removed the wires from the panel to no avail

[@_droid]

What makes you think a vertical dipole is not omnidirectional? I've never heard that before or seen it in the models. A horizontal dipole is directional but not a vertical. ???

[@transkryption]

Ive been wondering about MIMO and if the antennas need to be placed x or 1/x of a wavelength from each other for optimal gain.

[@08halit]

Please Andrew,i have a flight controller named dji a2 and it has a built in receiver with 2 dipol antennas,i managed to nip 1 of them apart and tried to solder it back but now it behaves utterly bad and im afraid of loosing it so i was wondering if u could create 2 new antennas,,i could send boyh off them to you for measurements..il pay for your services,,please i really need your help.

[@IvanIvanov-id3de]

Thanks for great video! I'm not sure you're right about that PCB antenna. I think the wiggly strip matches the phases of top and bottom part. Regarding different lengths of radiators - it looks like "fan dipole", I'd assume shorter length resonates at 5Ghz and longer is for 2.4Ghz. Regarding length not matching 2.4 and 5 resonant frequencies - I think with that kind of complicated pattern and with 4 radiators - you may need to change length from resonant frequency to match 50 Ohms impedance. Also, dielectric constant of PCB material may be an factor here, not sure. Regarding the first antenna - I'm kinda in doubt you can make an ultra wide band antenna that easy. My guess is that it has mediocre performance at both bands, but I may be wrong... Anyway, I'm very curious to see VNA measurements, if you happen to have one.

[@sgalien6661]

Really good video, could I ask if you have covered the wifi ants that are soldered to wifi routers and how those can be upgraded? i have an Asus router that claims to be a duel band but only has 3 ants and 2 are soldered to the m/b and one uses a tiny pigtail. there is no info on which is which freq or if they are all duel band but i think (think lol) that the two soldiered to the m/b are the 2.4ghz and the pigtail center ant is the 5ghz as I've seen several others online which are simular but with 4 ants and both soldiered ants are 2.4 and the two pigtails are labeled on the m/b as 5ghz. Any thoughts or have you covered this yet? I'm looking to add directional external screw-on ants as this is my second router which is in my home office and id like to send the signal about 25m from the 13th floor down to a small workout area that says 10m to the right and away from the building and lucky i have a 1.5m opening from my window to direct the line of sight through. Hope you can follow along with my madness, id like to do it just because and being a retired ex brit army rad-op i know it can be done so why not :) Thanks in advance from a friendly Brit overseas in sunny Singapore - Chris A

[@Yottenburgen]

Hello, if you have two of the flat wifi popular ones, how would you suggest them orientated around a Desktop? one in front and one on the back? both on the front far or close apart? and would you mount one horizontal and the other vertical? Does it even matter? I keep finding differing or lack of information on mounting them.

[@ali2naveed]

This is true free education. Years of experience in shortest time possible.

[@mikewoods1288]

yes he's truly the antenna GURU...If science don't support it he doesn't teach it keep this great channel going it's like old school PBS...

[@Ronald-xo9wr]

where did you buy that dualband peddle antenna

[@Colin12101985]

Does this mean that if you were to use thin wire you could narrow the bandwidth of a 2.4 or 5 ghz and tune it to a specific channel? Would be interesting to see if tuning an antenna to a specific channel makes a difference over a standard one. Or is there a way to measure what the frequency response is of a particular antenna and then choose a channel that best suits that?

[@marc_frank]

i think this would also need to consider the output impedance of the transmitter as that also determines which channel it works best on simple ones, of course

[@Inspironator]

Colinear has more than 2 elements,. Could be 4 or 6... 4 elements extends the lobes out more along the ground and less radiation above where it would wastefully go into space.

[@ba2629]

We the hams of the United divided call them verticals, not colinear. generally a dual band will be seperated with a matching coil on a 2M, 70cm antenna with grouNd plane radials or the roof of your truck. some time depending on what your working you may see a capacitance HAT

[@andrewmcneil]

Thanks for the info BA. So the mag mount that you see on vehicles with a loading coil at the base, are they called verticals?

[@ba2629]

some guys mostly cbers will call them whips . the coils at the base areulauly tuable on the fly unless your doing and end ed long wire antenna @@andrewmcneil

[@krzysztofswitkowski5364]

If comes to the upper sleeve dimension consideration, you should add the length of coax core connector length (it should be about missing 3.6 mm). It adds up, to the dipole length. Now, it is clear that antenna is tuned to 2,4 GHz. If comes to the bottom sleeve, watching your videos, I have never heard from you about additional role of the element. To the best for my knowledge, bootom sleeve is a "sleeve balun" also known as bazooka balun (1:1), beside being the second dipol l/4 leg it also improves the antenna performance (choke some currents).

[@ZonaALG]

Please make a *really good diy dual band laptop wifi antennas* video. It would be great

[@abo3abid1]

Wouldn't it be faster and cheaper to just buy/get a junk wifi router/access point that has internal ufl connector (they almost always do), and install it's antennas. All laptops have internal ufl connectors? It's a cheap way to move to (up to) 8Db

[@SeeNyuOG]

Hello Andrew, Could you please tell me if one Dual Band antenna can be used for 2 different wifi networks (one 2.4ghz and one 5ghz) at a time? I'm having a discussion with a friend and I fell like it's not possible, but as noobs, we cannot find easly the answer. I understand one dual band antenna covers both 2.4 and 5 spectrums but before usage on one or another it has to be reconfigured?

[@andrewmcneil]

No they are used at the same time the two frequencies are so far apart they do not interfere or interact with each other. But the offset of a duel band antenna is a loss in gain.

[@johnbaas3117]

Hi Andrew, is there a way to get more gain out of these dual band antennas, I have a whole bunch of them from TP-LINK routers, is soldering a piece of copper wire on it a methode to have more gain in the 2.4 GHz?

[@johnbaas3117]

@@misterkota1252 Hi, I am still waiting, but actually I totally forgot that I've ever asked 😂

[@MubarakNour]

You R Great Thank you indeed

[@andrewmcneil]

Thank you too

[@mandh14]

Cracking vid!

[@tabiApo41013]

what is the measurements of that dual band pcb based antenna?

[@mdwillington9416]

Any chance of a follow up soon?

[@ConnorA21]

Is there a way to check the gain of a wifi antenna?

[@andrewmcneil]

VNA

[@infoalterna1990]

Thanks for the information ! Was really useful! Greetings

[@gustavoenriquejimenez8098]

Thank you!

[@gunepower2428]

I have 2.4 ghz grid antenna how can use it for 800 mhz for 4g I mean what I can do to make it receive that frequency

[@vatterger]

Nothing much, you are better off building your own: en.wikipedia.org/wiki/Monopole_antenna

[@mikewoods1288]

can't do nothing since buying the correct one needed cost nothing

[@hamidlachguer4830]

thank you. from morocco

[@jonnieandalan8214]

Plss make a video how to modify that

[@djtahir7752]

Good job sir ...

[@bloodyjoker4403]

sir make 1 antenna for pocket wifi

[@jocasimoes2222]

Thanks👍

[@santosmorales.cienciaytecn9357]

Buen video Saludos

[@freefilms10000]

I am confused again. I am sure you said wi fi was 5.8ghz

[@thecentralscrutinizer5105]

wifi usually comes in 2 flavors, 2.4Ghz & 5.8Ghz, Higher the freq, the more data that can be transmitted @ once, BUT limits the radio range.

[@marc_frank]

0:21

[@medmusic7977]

Vistumbler man ! U forgot the test

[@dieudozedscorps7310]

5.8. Ghz géométrie antenna

[@koliakarapiperidis971]

first :-)

[@РусланАлександров-д3ъ]

Субтитры на Русский язык!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!