Yagi Cantenna (Yagi in a Can) 2.4GHz
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- เผยแพร่เมื่อ 22 ก.ย. 2013
- Yagi antenna for the 2.4GHz spectrum (Wi-Fi). What's different about this antenna is that it is inside a cantenna giving it more range by narrowing its beamwidth making it more directional than a standard Yagi.
yagi template: goo.gl/GJrrUX
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Email: andrewantennas@gmail.com
A good Yagi calculator can be found here: www.changpuak.ch/electronics/y...
Copper foil tape: www.ebay.co.uk/itm/36043032037...
The cantenna is made from a toilet brush holder. These seem to be a standard size but the dimensions are: 265mm length, 90mm diameter.
To test my antennas I use a test router 40 meters away with the signal going through three brick walls. - วิทยาศาสตร์และเทคโนโลยี
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Fantastic build. Very impressive results.
As a radio ham this is all very interesting, thanks for explaining in depth and so clearly.
very good at giving full information and insight into the fundamentals of wifi... top marks mate... highly reccomended.
Thank you for covering insulating the driven element from the rest of the Yagi. I prefer insulating the front parasitic elements also but have no proof that helps. Once out of the air, the wave propagates down the metal at the same speed.
Hope you make a 5 Ghz cantenna as well.
Cheers
copper foil tape is also used in stained glass windows/art panels. It is wrapped around both pieces of adjoining glass and then soldered to hold the two together.
Andrew, another enjoyable video.
Thank you for sharing this!
Beautiful ! Just a small remark : BNC is useful up to 1 GHz (1.5 GHz). Using SMA may be more advantageous.
Friend I use bnc in all my projects and the gain or impedance does not change .
Nice video. I like your Hakku soldering station too.
Very nice! Thanks for sharing!
Hi bud really great work I'm going to Def get on and make one .. Thanks for the inspiration
You my friend just saved me around $100 US! I was just at Lowes pricing copper pipes tubes and rods for my own antenna. From what I'm seeing from the end of your video this will give me direct access to the AP I've been struggling to stay connected to. All for pennies on the dollar, and for a toilet brush can it looks a hell of a lot better than a 3 foot long monstrosity of copper piping!
Wow! Thank you very much for this video! Nice that you sad that cheap yagi antennas on ebay does not work! I was close to buy it! Now I'll just have to make a diy yagi like this! Thank you, times ten!
I agree that those cheap WiFi yagi antennas off ebay don't work - I bought one just like it and it is junk - I am glad this gentleman told everyone about them.
Really great video. Love it.
Hello, very interesting and well documented presentation, I gonna test your wifican antenna !
My pov about your realisation :
- Black paint is not a good candidat because it increase the temp in the can and increase the thermal noise never a good for signal noise ratio. The best paint are shiny white paint (never use mat) this is the same raison that you must never wall outside an house with mat paint.
- Take care about bnc connectors they could be very problematic and increase loose and noise or buy expensive connector certifié for your work frequency; for this reason every as soon as possible i always solder directly the wifi dongle (or SDR dongle ) directly on pcb with a shortest low noise wire and put dongle in metalic grounded box. This make some differents with sdr dongle.
- If refer to pratical antenna handbook (the holy antenna bible) with an air core in your case plexiglass this kind of antenna must be less sensitv to "Electrical vector" than with a copper or Aluminium, it could be interesting to compare the 2 case copper VS air core antenna.
- Have you be able to test with a vector analyser (minivna & co) ?
Thanks
Great video. How would the calculations change if you just drilled a hole at the ends of the element dimensions and wrapped wire around/through the plexi?
Great design Andrew.
I noticed that the driven element became a folded dipole when you soldered the copper with thru it, ingenues.
incredible- makes me wish I still had my radios.....
thankyou mate i really enjoyed that cheers
How exactly do we use a template of we don't have one?
Do you maybe have measurements?
good video. thank you.
what wpuld happen if you had the driven element spaced laterally the same distance as you have the other elements. instead of the driven elements being speced the thickness of that peice of plexiglass(3-5mm), they were spaced the same distance as the elements are horizontally? am i making myself clear? sorry if not.
how much of an improvement would you get out of this pointing it into a parabolic dish, something like a used satellite TV receiver?
updates on copper on both sides?
Thank you
I bought one of those joke yagi's your holding @00:50, at the time I thought I was doing something wrong with it. I installed a wireless IP Security Cam system around a lady's house, 12 camera's. She also wanted one down at her big 2 car garage (had a living quarters above) which was roughly 300-350ft (90-105 meters), with a clear LOS. whole system was based off the home's wireless router, I used a pair of the ol classic WRT series linksys wireless 54G's (fastest @ the time). setting up as an AP... that bloody garage camera was the biggest pain in the.... I went from stock antenna to a bigger pair of -11dB (on both router&AP)
caught a drift of an image for about 30 seconds, then poof.... SO I bought from fleaBay, that very same shiny stick you're holding there @:50, aimed& roof mounted it,....there, for hours, me the roof became one,.. I was better off with the higher db internal dipoles.
Keep in mind, I had no clue back then about wireless sigs, rf in the gigahertz range, antenna types, wave length's, resonance freq, etc I was an old school tv antenna guy just learning about computer networking ;)
Solved the dilemma very painfully.....ran a buried cat7 drop out to garage...lmao, I wish I knew then what I know now....d'ohhhh
It might not be a bad idea to have a known measurement on all the printouts to make sure the scale is correct on the finished print.
I don't think he responds.
@@icraftcrafts8685 You are not understanding his question. When the template is printed, it is important to verify that the dimensions were not altered/reformated by the spooler and/or printer.
@@sinless1 Ok I see now, apologies. Here are 2 links that may help:
www.changpuak.ch/electronics/yagi_uda_antenna_DL6WU.php
www.ab9il.net/wlan-projects/wifi6.html
Hello there! Can you put an aditional template with the right dimensions in mm? It would be a great help for those without good printers. Thanks
Hi, What the config if i have tube 100mm diameter ?
easy to follow great video
Hi Andrew, great job on your videos on antennas. I was planning to build a 10 or 15 element Biquad Yagi similar to your previous design. After seeing your new antenna design, I have a few questions-ideas that your answers-insight would be most appreciated.
Here goes :-
1. How does this antenna perform compared to your previous Biquad Yagi?
2. Would the Biquad Yagi provide similar performance with wider beam width?
3. How about a double Biquad Yagi?
4. Would re-positioning the yagi element at 1/4 or 1/2 wavelength
inside the cantenna make a difference?
5. How about a Biquad Yagi Cantenna
Thanks. Looking forward to your next video.
Man makes my piece of wire for antenna a joke. You sure know your stuff here 👍
What are you using to design the layout and size of the elements?
Hi ! May I know how to connect this antenna to a computer or modem ?
Did you compensate the element lengths for the dielectric constant of the Perspex? What are the frequency bandwidth 3dB downpoints?
andrew mcneil tell me which antenna is fablous for gian wifi signal and also qualitiy of that wifis best anteena?dish?parabolic?yagi?parabolic dish? kickstart biquad??? please help me
If I were to make the can slightly conical would that have the effect of slightly 'opening up' the signal. I would like to utilize the antenna for use with a UAV using an automatic following system but your comment on the cantenna being extremely sensitive would preclude it from being used because of the slight delay in the 'following' system may cause the signal to be lost.
I have seen several posts here asking for dimensions of the template, could you please advise the distance between the first and second element in order to ensure correct scaling.
Can you tell me the antenna suitable for satellite feed pot?
Hi Andrew. I watched two of these great videos and I am wanting to give them a try. But Before I do I would like to know if a yagi can be used on a Android tv box.? Will it improve the signal ?
or can i use 3 soda can and put it together?
If I was planning to use sma connector, would it be male to male connector or male to female connector?
would I get the same results if instead of using plexiglass & copper tape, I printed the pattern on a PCB?
What software did you use for the element spacing? Id like to make one for 23GHz
Hello Mr. Andrew! Can I test this antenna with adapter chipset Ralink RT5370? It is a small USB kind internet adapter.
Thank you!
I have a question if you can solve pls. I made a yagi antenna which i mounted on roof which capturing good signals, on other hand (receiving end) there is no antenna. So i want to know if there is any antenna that can receive the signals from yagi antenna and spread those signals to my mobile phone. I shall be very thankful to you if you solve my problem. also note, i do not want to use any wifi or any dongle. what i need is an antenna at the end which receives signals and spreads those to my mobile. Thank you.
Fantastic! Could you tell me how much DBi this cantenna+Yagi?
thats really good. the perspex yagi idea (without the can) might be a good way to make one that could be robust and compact enough for a backpack. would the yagi without the can be a little less directional?
Another question regarding the center conductor of the RPSMA pigtail incorporating RG316?? from Ebay? I am assuming that you must prevent any short circuiting of the center lead with the element that is soldered to the shield driven element, as in drilling a hole large enough to allow the insulation of the center lead to go thru the plexi?
i used a hard card board in stead of plexi glass can i connect the antenna directly to my router?
does Wi-Fi have a polarity ,and I wonder if the back of the can can be make parabolic to make the focal point in line with your folded die pole ,kind of like a catchers mit .good work its very hard to make Yagi's in 2.4 gig .
Please give me a refresh on distance x y z and shape of antenna.
What's the name of that white plastic small screw sir?
I'm curious, how the distance between the upper and lower elements affects gain. If you used two sheets of Perspex for spacing would it be better or worse. Is There an optimum spacing between upper and lower?
I once had a long distance between my antenna and computer, I was afraid of the coax losses. So I disassembled a wifi dongle cut the antenna and mounted an N connector to match the N connector on my Yagi. I connected the wifi dongle directly to the Yagi. Then ran usb cable to my computer. It worked great, I used that for many years. It was all mounted on a boat in a marina.
Also, it looks like there are only two lengths of foil, please post the lengths as printers often change the original size. Then I would make a quick template to cut the all.
Very inventive !
Can you make a PDF with meassure of 400 to 900mhz for same type antenna???
Do you think you could also use glass for this project? and like the yagi gun could you just keep adding elements?
I'm looking in to methods of extending WIFI and internet connectivity from the main house about 500 ft/150m to a second building on my property, and researching Yagi prototyping before buying hardware for the second bldg.
I have a large amount of scrap materials to use for this project, but I don't really understand the physics at work here to know what to use.
How does the diameter and spacing of the elements effect the waves, and what is needed for 2.4 Ghz standard WIFI? is there wiggle-room, or is it very specific?
Also, would I need to do anything to the router at the main house, or should the Yagi at the second building pick up the signal inside without a problem?
Thanks for the content!
I really enjoy your videos. I have not yet built any antenna but , have been looking at the DIY many months and many different types of antenna for long rage wifi. What I would like to see if it is possible is a duel band 2.4 MHz/5MHz . Using canteen for the 2.4MHz and the helix for the 5Mhz. And a duel band USB adapter to link them at the antenna. My question is ..IS IT POSSIBLE?
Does this work for cellular aswell? 4G signals in particular. And is the connection stable? Or does it introduce lag spikes or disconnects?
what application is that you use to scan wifi?
Hi Andrew do you have wifi antenna shop online ?
Do you have a template for 1800Mhz? Would be useful for 4G LTE in rural areas.
Nice videos!
Excellent
Andrew the link for the Copper foil tape don't work how wide is it ? Thanks
How can I make the WiFi on my galaxy s7 stronger when I'm online
is hard for make i want solution easy ?
im skeptic with the feed point,i thought folded dipole were fed in on center on one dipole element,so the element would produce one full 1/2 magnitude, feeding it that way could produce cancellation because of reverse directions, isnt the folded dipole 300 ohms, no 4:1 coax balun?
Will you in future videos consider working with other frequencies i:e 700-800 MHz spectrum for lte 4g?
is this not compatible with 4g? What's the lowest frequency you can realistically get with this setup?
I dont understand this: on minute 15:43 you are making contact between the center of the connector and the ground, is that okay? you are short-circuiting both ends of the conenctor?
Hello there :), my question is simple is it longer better? I mean because I have 300 mm. long pipe should I reduce it on 265? Thank you in advance. By the way you are awesome, I did watch all of your videos and I'm very glad. Thank you!
This is Great!, but isn that a Short Circuit at the fiirst "Director"? the ground and the center pole are circuited together?, or is this common in microwaves?
Hi, what toilet tube did you buy for the correct dimensions?
It looks to be a basic white B&Q Steel Toilet Brush holder at £3.50 currently, so really inexpensive to buy www.diy.com/departments/bq-white-steel-toilet-brush/132204_BQ.prd?ecamp=Seapla&ppc_type=shopping&ds_kids=92700015947509140&gclid=CMfqrebCg9ECFQEG0wodtPMGWA&dclid=CI_j3ObCg9ECFa6m7Qod0kYEKw
Andrew, great video.
Can you post the dimensions of the template. If you give one dimension, I can use that one dimension to determine the others. As a few others have mentioned, some printers may enlarge or shrink the PDF, making the dimensions change, thereby altering the efficiency of this antenna. Millimeters or inches, whichever is easier for you.
Thank you.
you should print in A4 paper, that's the configuration of the PDF document.
Does the can need to be metal? Can it be PVC or something plastic?
Sorry, but are the positive and negative poles shorted? The tape you weld it both above and below ...
Can you please enable printing or downloading for the antenna template on google drive?
Is it also possible to just use the yagi without the surrounding can? I want to use the antenna for travels when the hotel wifi is bad and i need to reach some other distant public hotspot.
Cu strips easily damaged while transporting. Scratch a strip and it's all over red rover. I would used large pvc water piping which solves ll the grounding probs and screw or push lids are bought off the shelf.
All: Instead of asking thoughtless questions of Andrew, do your own research and learn something along the way. Sheesh!
Nice video. Question, Most commercial antennas appear to be Vertically polarized. Yours appear to be Horizontal. Am I missing something or does it not matter at this frequency?
It dipends on the signal
Hey Andrew,
This makes me wonder if one could make stained glass decorations that would also be wi-fi antennas? Obviously I don't mean a 'yagi' style, but a a mere basic wi-fi booster mayhaps?
Stained glass workers use this copper tape to line the edges of glass before soldering together...I think it would be dead brilliant to make decorational wi-fi boosters. windows or not they'd still look cool & as long as they're made properly, they could hang virtually anywhere...minding the critical info for reception of course.
It mght constrain the direction you need tho.
Question, if you had to transmit 2.4 and or 5.8 wifi from one building to another over 10miles apart like me in setting up long range mesh network, what antenna would you use and please dont just say dish lol as thats expensive and stands out a lot! id like to try and be somewhat discreet as i may likely be using clients roofs and they would not like an isaw on the roof. Could a patch antenna do the job, perhaps stacked patch like the larhe one you opend up which was printed on a pcb but i dont understand how that works as it is not an active array and i was led to believe during my time in the army as a rad-op that you cant just add in another ant. So how do those stacked antennas allow for additional yagis/ patch antennas etc to use one cable and not increase power??? Really hope you understand what im asking and that you reply to this, i will look to find such a video you have done and comment there just incase you dont quite follow. Thanks again.
Thanks.
I'm confused about the driven element. Is it a folded dipole? The short by the vias would seem to indicate so. But with center of BNC driving the center of the element, by symmetry, the current flows in opposite directions, and the fields should cancel. It doesn't seem right to me.
Thank you for this video Andrew. I am not that familiar with RF but followed everything you did except at 10:15 in the video where you drill the vias in the radiating element and put a copper wire through them. I was wondering why you did that? and why it was done only on that element and not others? Thanks again for the great video!
because its the driven (powered) element and must complete a circuit. all the other elements are passive and only direct the wave.
That makes it a folded dipole driven element, If I remember right. reason for this is to a) match impedance? b) 1/2 wave driven element in the space of a 1/4 wave? c) produces around 3db more gain?
no need for impedance matching then? Nrfl01, for example connecting straight to module with no balun.
what if i will gonna use PCBoard, does it work?
I've never seen anyone connect the cable to the center of the driven element like that before. Does that actually work OK compared to the traditional ways?
Hey mate. I was wondering if the antennas you make are also able to assist in boosting the 4g/ LTE phone reception as the antennas I’ve bought don’t make any difference. Cheers in advance old mate
These are for 2.5 ghz band for Wi-Fi. For 802.11 n/b/g ect. So no but you can find plans to make your own for LTE.
Just to be certain I can use a standard USB cord to solder on for connection right...? I have a big gaming computer and I am always looking for improvements in performance.
Negative. You cannot use a USB cable to connect to the antenna. The antenna requires a coaxial cable that has a center conductor and an outer conductor/shield. The center conductor transmits the RF signal to the driven element while the outer conductor is the ground connection (in this case, the completed circuit connection for the driven element).The USB is a universal serial bus connector and is used for an entirely different purpose.
Did I hear you actually state at 0:45 that the elements on the eBay commercial yagi were configured more for 150mhz than 2.4Ghz?
Hi nice tutorial! I have a USB wifi adapter with removable antenna, can use this as LNB for parabolic antenna connecting directly to the adpater ? thank you! and sorry my bad Eng
Hi yes you could do that and it would also reduce loss so in theory should perform better.
Andrew I have been following your good works for some time now. It has finally come to the point where I must adapt this Cantenna design of yours to run with a rather large booster in the 8 watt range. How do you think it will perform - efficiency and reflected power considered? I laugh to myself thinking about running so much power through the copper foil driver element! :-) P.S. there is a spare element on the Google Docs printable file you have provided. What is it for mate?
The cantenna you built is mounted horizontally. Most routers have vertical antennas. Wouldn't the cantenna be have a higher gain if vertically mounted/polarized?
You could glue two small plastic guides on the entry side to stop the perspex moving if dropped
would have liked to see you compare it to built in wifi during the scan at the end. otherwise great video!
wonder what wil happen when i use my ralink 3070 1000mw chipset on one of youre cantennas! i get a range of 3 kilometer with the standard 7 dbi omnidirectional outdoor antenna :p
Hola esta muy buena idea lo voy aser una antena como lo describe. Gracias
Pretty neat. I wonder, the plastic lid you put in front of the antenna to close it up and make it look neat, will likely introduce some RF loss. The lowest RF loss material you could use there is styro foam (mostly known and used as packing material) as it has very low density, RF goes right through it. Also in speaking of RF losses, the plexi glass material you used, might also introduce RF losses, perhaps comparable to using just FR4 circuit board material. For testing your antennas, you might want to consider getting a NanoVNA - about 150 Dollar on ebay. Then you can actually tune for maximum performance.
How you can use NanoVna for wifi antennas? They work at 3 times higher frequenicy than NanoVna able.
Has anyone asked what the width of that copper tape is? It's sold in here in the US by fractional inches, of course. So...1/8", 1/4", 1/2", ECT.
I figure yours would be in MM, so would you elaborate? Your ebay link for it in the description has gone out of service, I'm afraid.
Thanks!
U need an alt-az telescope mount😀 they have ones with motors and hand controls. Even an Ethernet port so you can control it from your computer. 😀
Sir, Can you please give us the dimension of at least the reflector, so your tutorial is fully worth and usefull.
cant print this.. please re-upload in another format elsewhere
cheers
So, if this works, it's just dumb luck since there is no matching from the balanced driver (ie the yagi) to the unbalanced load (ie, the co-axial connection to the router ...