Biquad Curve 2.4GHz WiFi

Since building my first antenna back in 2001 the Biquad still remains my favourite. Over the years I have built them in sardine cans, pie tins and CD cases. This one however I really do like.
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[@haggar11]

What a professional and sophisticated design Andy, thanks a lot for your continues contribution to WIFI tech.

[@andrewmcneil]

Thanks for the lovely comment Hassan

[@arehman8679]

I have to say that its one of the finest works i have ever seen on youtube by an individual, actually it compelled me to appriciate this fine work, excellent attention to details, careful & miticulous work, beautifully explained each step . Keep the up the good work.

[@andrewmcneil]

Thanks Rehman

[@michaelstarks7029]

Excellent craftsmanship. It's a rare talent these days.

[@friddevonfrankenstein]

"You never want it to shrink prematurely" Now that's what I call life advice.

[@farrellsessou3544]

Excellent

[@electronics.unmessed]

Really nice construction guidance! 👍👍

[@victoryfirst2878]

Good day Andrew, I have to say you really keep attention to detail. Your produced antenna is a work of art for sure. Would you tell me what you would choose for a TV antenna type with max gain and small form factor for a ultra deep fridge range of reception ??? Thanks vf

[@youssefayyar6011]

THANK YOU SO MUCH SIR ANDREW

[@andrewmcneil]

your welcome Youssef

[@chrisconnolly6524]

Hi Andrew, I've watched a few of your videos. But I'm curious over the curved reflector in this. Please ignore my ignorance, I'm just trying to get my head around some of this... Does a curved reflector in this case make much of a difference since the driven element is flat and the EM waves would hit it effectively perpendicular? Wouldn't any pickup on the vertical extremes of the driven element be outside the focal point? In that case, wouldn't a flat reflector be better suited? Or am I missing something. Would you mind filling in the gaps? Watched plenty of your videos in the last few days, and I'll be putting together two of my own bi-quad for 2.1GHz 4G reception - it's fairly poor where I am, and I've just cancelled the best fibre broadband a BT line can give me: 10Mbps down, 0.5Mbps up!!! Also, would this design benefit from directors / parasitic elements being placed on front like a Yagi antenna? What do you do for impedance matching? Just placed an order for some parts, and looking forward to getting stuck in. Btw, you should get yourself a 3D printer, could be an excellent tool on jigging these things up. If you ever want a few peices 3D printed and posted down, send a PM, I would be more than happy too for what I've learned on your channel.

[@ministeriomundialliberando8403]

Thank you very much! Can you share the formula to calculate the focal point for of this type of parabolic shape, please? Thanks in advance

[@user-gs6dn2zg8i]

Saya terkesan dengan pembuatan nya. Mulai perhitungan dll. Saya mencoba belajar memahami apa yang di buat saya mulai kebingungungan dan sering mengalami kegagalan karena memang berbeda kasus nya

[@fluffyfloof9267]

If you intend to please the symmetry afficionados amongst your customers, you could put the outer set of rivets in the centre of the outer quads. Purely cosmetic, though. Edit: you could even put those two posts, that are at the ends, under the cross and affix the driven element with that epoxy putty. That way, you could even hide the heat-shrink. The idea is to eschew privets completely, and use nuts (on the posts) at the back side. Again, purely cosmetic, but even "cleaner".

[@davidm1635]

one word: beautiful

[@ali2naveed]

Fantastic Job. Love to see the professional work. Keep it up.. Already Subscribed :)

[@thecentralscrutinizer5105]

Nice looking unit Andrew, As you know, I usually make these after your inspiring video's. Please notify me when you get this one in your eBay store, I would like to buy this particular one sir.

[@thecentralscrutinizer5105]

Are the two support posts metal??, can they be in contact with the back reflector?

[@andrewmcneil]

Will do Ralph

[@andrewmcneil]

Nylon

[@andrassteger9589]

Dear Andrew, I really like Your videos and the very practical & simple approach. I would like to replace my GNSS antenna (2.6 dBi) with a higher gain one. Is the concept of the Biquad antenna working for GNSS signal as well? For example: L1 = 1.575 GHz -> wave lenght= 190.2 mm, the wire lengths will be 47.6 mm & 95.2 mm. > If the Biquad antenna is not right for GNSS, then what is Your suggestion? > Any kind of feedback from anybody is sincerely appreciated on this subject :-). Thanx a lot in advace.

[@Jonny10001]

Hi Andrew, are the end supports earthed or insulated? Which program do you use to view the WiFi access points. Keep up with the good videos.

[@andrewmcneil]

If you mean the nylon supports then no if they where they would short out the antenna. www.vistumbler.net/

[@millanferende6723]

these are amazing antennas! I see you have 3 attachment points. One in the middle and 2 on the sides. Are the 2 on the sides insulated?

[@loveugirl9195]

please make video on Cell 3G/4G antenna designs . I have my DIY cost only 0.7 $ and working fine upto -75 to -80 dBm. please suggest me some Idea to get it within -50 to-60 dBm. thanks.

[@NesConsola]

Very good information and preparation of antennas of your channel. consultation could you pass me the information on the preparation of that antenna thanks

[@t.m.larson]

can you post your eBay store, so I can see if any antennas come up for sale.

[@sim6699]

@@projectdn5 can't find "andrewantennas"

[@bigpaul009]

Hi Andrew, love the videos and I have a quick question for you. I have a caravan and while I am able to get on the Internet I am just out of range of a 5g signal as it flashes on and off so the mast cannot be that far away. Which in your opinion is the best and easiest antenna for me to make to drag more of the signal?, keep up the good work and keep safe.

[@Assitier69]

Could you show how to make the Poles on the end to hold the copper biquads? And what's the thick thighs around the copper on the little biquad?

[@armstrongskyview2810]

Hi, can i buy one of these from you pleaae, do you have an ebay shop and can you ship to a fellow brit overseas as im now in Singapore.

[@TarreY13]

Your video was very helpful and safely but I'm not very good with centimeters could you tell me the measurements in inches I was never really too good with math and stuff but great at building stuff I would really like to know the measurements in inches that really be helpful please and thank you

[@andresgongoraYT]

Could you please provide some details about how you painted the double-biquad? Every time I try to paint aluminum myself I end up with that wavy (probably too much paint) pattern as you also got on your single-biquad antenna. I know the difference is that one uses shiny paint whereas the other is matte, but still, the double-biquad looks gorgeous.

[@Xynudu]

Interesting approach. I'd be interested to see how signal strength compares with a conventional flat reflector version (same element). It looks like the element cannot be optimised uniformly to the reflector because of the variances caused by the curved shape. Having said that, obviously the reflector will work to some degree (excuse the pun), but just how effective will it be for that dimension. Cheers Rob

[@andrewmcneil]

Could do a side by side test I will say that the thickness of the aluminium, 1.5mm would help in pushing as much of the energy forward. (front to back ratio)

[@Xynudu]

Hi Andrew, That would be interesting for sure.

[@dennissirvent6965]

What type of cable did you use to lead out the back? (Example: 24, 26, 28awg or certain coaxial standards)

[@gc9n]

Andrew whats the exact mesurments for the tool you used , i think is 31.25 X ?

[@arctictimberwolf]

26:05 You get a Plus 1 for saying the word "Snazzy"

[@3rd_Millennium_Engineering]

Hello again Andrew, If you DO in fact consider selling these, any chance you could ship to Maine in the US? Do you have an idea of costs for the antenna as well as shipping to the US? Thanks.

[@wilsonstratulat8199]

what instrument is the coax wire attached to???? enjoyed it very much thank you,,,,

[@bjarnivalur6330]

If it's a double biquad, wouldn't that make it a quadquad?

[@kamerongatlin5721]

You prolly dont care at all but does any of you know a way to log back into an instagram account?? I somehow lost my account password. I would love any tips you can offer me

[@daxtonelliot4968]

@Kameron Gatlin Instablaster =)

[@kamerongatlin5721]

@Daxton Elliot i really appreciate your reply. I got to the site thru google and Im waiting for the hacking stuff atm. Seems to take a while so I will get back to you later when my account password hopefully is recovered.

[@kamerongatlin5721]

@Daxton Elliot it did the trick and I finally got access to my account again. I am so happy! Thank you so much, you saved my account :D

[@daxtonelliot4968]

@Kameron Gatlin happy to help xD

[@kevinanderson9243]

Could this be done with 2" black plastic abs pipe and a copper plate on the back?

[@manoelvila7264]

Você fás antenas rural?

[@victoryfirst2878]

Did you solder the ninety degree wires with barrel couplings ?? Good day Sir. vf

[@boriskostadinov9350]

great antenna, thank you for the idea. Have you tried to combine two of those? you can search in google: Antena 6 Quad for example.

[@cesarluis1703]

Could you give the measurements of that rare biquad antenna that you have there? I see that they are not common rods. It has different diameters up to the middle. could you pass the measurements?

[@TomTheDragon87]

Really good video like always ;) ..I am thinking about making an antenna like that for myself but i am not sure if a double biquad or two single ones combined (over an wilkinson splitter) would be an better idea.

[@andrewmcneil]

Hi Tom give it a go and see how it works but remember a wilkinson has 3db of loss so best to use them in conduction with a small amp to make up the loss

[@TomTheDragon87]

​@@andrewmcneil Even if you got that loss of 3db, it still could operate at around 15db, which would be more than a double biquad, if i got that right. But thanks for you to consider testing it :)

[@RAMASHANKARSHU]

Dear Andrew recently you post your curved double biquard what is actually gain

[@andrewmcneil]

11 to 12 db

[@YouZbychu]

I've got an Asus RT-AC87U router at home which has 4 antennas but I'm not happy with the coverage in my 2-storey semi detached house. Would it make sense to replace one or more of the original antennas with the antenna shown in this video? My original antennas are 2.4 & 5GHz antennas. I realize the antenna shown here isn't 5GHz but I'm only interested in reaching some dead spots and I'm not interested in higher speeds of 5GHz network.

[@andrewmcneil]

it will work fine like that I used to do it to get wifi in my conservatory

[@methummethum8014]

Wifi high speet curcit diagram

[@jacksprat7087]

@@andrewmcneil Do you sell these?

[@mrgreenswelding2853]

I have a heaps of stainless steel wire for big welding, can I Use that.

[@jbx907]

isnt that vertically polarized, shouldn't the next set be on top of each other to be stacked?

[@andrewmcneil]

No a double biquad like this works in the horizontal and vertical

[@box1ne603]

Hi sir andrew... Can i ask a question? Witch is better the parabolic double biquad or the curve double biquad? And why? Thanks...

[@andrewmcneil]

parabolic because it has a focal point much like the difference between a piece of glass and lens you can start a fire with both but it is much easier with the lens

[@box1ne603]

@@andrewmcneil sir thanks..

[@MichaelMantion]

no test?

[@spirituallysavant231]

id like to buy this i have no reception in my part of the house

[@dagobb]

Will a Biquad 5.8Ghz be any usefull?

[@spirituallysavant231]

how much would you charge

[@nasrulacuy6991]

Is it possible to make dual band biquad?

[@andrewmcneil]

No I don't think so but I will be looking at dual band antennas in a future video though and how they work.

[@coidefisk3925]

algo

[@johnknowles997]

I am not too good a the metric system. so can you let me know how to build one in US standard measures?

[@txm100]

How can you be 'not good' at it if you just have to convert the given measurements?

[@amy-joe5772]

Is the word zero not in your country's vocabulary