Yagi Cantenna (Yagi in a Can) 2.4GHz
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- Опубліковано 28 вер 2024
- 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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My eBay store: www.ebay.co.uk...
Facebook group: / 1313077415524264
Email: andrewantennas@gmail.com
A good Yagi calculator can be found here: www.changpuak.c...
Copper foil tape: www.ebay.co.uk/...
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.
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!
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
Andrew, another enjoyable video.
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. 😀
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
Yagi antenna having regular distance elements and same-length direction elements, are pretty much ineffective if compared against real inhomogenic yagi antenna designs which have tuned elements and as well tuned distances inbetween them. This kind of "homogenic" format also has a "dead end" where no more gain can be achieved by just increasing the number of elements (because it detunes while increasing, causing pretty big sidelobes. Inhomogenic tuned arrays consistently increase gain while increasing length instead. Homogenic arrays with undercritical regular spacing are very broad-band on the other hand). Feeding two driven elements behind each other for the grounded (Reflector) and driven (1st element in front of the reflector) creates kind of a driven "capacitor" , not really making up a regular dipole in the first place. The usual way of properly building a yagi antenna using a loop (300 ohms) or split (75 ohms) dipole as the driven element - with a symmetry converter which is required to attach both wires of the router cable to it - is different.
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.
it would have been better if you created small notches to fold the copper tape around top to bottom on each of the elements to create a better uniform microstrip for the radiator and elements. This would eliminate the soldering top to bottom of the tape.
Hi bud really great work I'm going to Def get on and make one .. Thanks for the inspiration
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!
Thank you for sharing this!
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.
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?
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?
easy to follow great video
I really don´t understand how this works because the sheets don´t tuch themself so there is no conection instead of the first
Did you solder the coax screen to one side, and the center lead to the other side which was just soldered together? You are basically making a short circuit, and so it is not an antenna, and you are breaking the output driver of the wifi card.
Yep, i was thinking the same thing
Andrew the link for the Copper foil tape don't work how wide is it ? Thanks
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.
Hi Andrew, will a standard aluminum foil tape work as substitute in place of the copper tape? Thanks!
Great video. Very informative.
EDIT: Sorry I made a comment before halfway of this video. I see I can use aluminium foil. (smh) I was too excited for this DIY project.
UPDATE: Another question. Does it need to be transparent for the board that holds the elements? Thanks!
Completely wasted my time watching this. This design has some serious design faults! A yagi consist of dipoles as elements.
@@haraldhaporta425 9:35
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
Hola esta muy buena idea lo voy aser una antena como lo describe. Gracias
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 Andrew, would this be as long range capable as a dish with a cantenna such as you have made? Also i have sent an email to you but due to being in a rush i left out that id like to know if you still sell ants as getting parts here in Singapore is quite expensive so it might be far better to just ask if you still make them for others and if you would post it to me over here please.
Regards
Christopher
Ideally for a dich you want a short waveguide at ½ wavelength 63mm.
Isn't your driven element shorted to your ground plane right now because you put those 'vias' in between the sides the lead is soldered to? Shouldn't the ground plane be connected to the can rather than the driven element?
If you had created the reflector from tape like the template had it, you can leave the can isolated. If you don't have that, the only thing acting as the reflector is the can and you're not connecting to it. That will at LEAST lose you a lot of gain.
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 ?
would I get the same results if instead of using plexiglass & copper tape, I printed the pattern on a PCB?
Your yagi is 90 degrees off ! Why do you have it mount side ways?
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
Not too shabby old mate
hi no it made no difference that I could see when I was testing.
Instead of laying this on a flat plane like your perspex, could you possibly put it on a curved surface like a clear fluorescent tube cover or would that mess with the waveform?
Unless you are building a helical antenna. google it.
One question, in Venezuela i can't find a cylinder with 90mm diameter. I found a 134a cylinder with 72mm of diameter, if i use it i will have problems using this template? Or what should i use?
you will be able to fit the Yagi in but 72 mm is the absolute minimum diameter for 2.4GHz
@@andrewmcneil yes, the thing is i don't know if make some interferences with resonances and other things using that diameter.
i used a hard card board in stead of plexi glass can i connect the antenna directly to my router?
If I was planning to use sma connector, would it be male to male connector or male to female connector?
I reeeaaally wanted to make this, how come you disabled printing? Everyone here in the comments wants the template! Please enable it!
Hi, What the config if i have tube 100mm diameter ?
What are you using to design the layout and size of the elements?
Please give me a refresh on distance x y z and shape of antenna.
I noticed you mounted this horizontally instead of vertically. By being in a can, does polarization not matter?
Definitely does, but you would experiment anyway.
What software did you use for the element spacing? Id like to make one for 23GHz
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
No balun nor reflector?
Reflector is the waveguide and waveguide is the balun
Use Snipping tools in windows take picture in this post and save, then print > Done.
+Lưu Luật Thanks but snipping tool is not working in millimeters but uses pixels. I am also sure that snipping tool does not care about paper sizes like US letter or A4. Hence all the proportions will be off.
Yagi ddwrt repeater linksys v6
here is my response video... let me know what you think...
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!
this antena.de yagi.is perfect. signal.
15:02 "I have got some epoxy potty"
What is the use of copper if it's not connected to anything?
if you take a perfect isotropic radiator the global aim is to put in shape a field who look lyke to donuts / tore on a vertical antenna with a single radiator.yagi and other antenna use n elements 1 radiator where bnc or sma is connected and elements to put in shape the field.
- if element is after (here in the pdf at your right handise) the aim is to act as a director element the goal is to focalise / reduc the angle.- element is before aim is to act as a reflector element a miror that must send back retropoagation in constructif phase.
The best analogies is optical replace in your mind element with optical elements and isotopic antenna with a bulb lamp that you wana focalise in only one direction in conical shape.
All elements must place at the correct distance and position in order to respect construc and destruct phases who are a fraction of lambda of the frequency. This why "antenna are cut / sized " for a special frequenc. as harmonic exist antenna can work on other frequence than the nominal frequency F0 but they this is not optimum and very depend of the frequency band.
@@antoninperbosc1532 completely new subject yo me. Thanks
try to buy the book "Practical Antenna Handbook 5/e" Joseph Carr ISBN-10: 9780071639583ISBN-13: 978-0071639583ASIN: 0071639586or in pdf s1.nonlinear.ir/epublish/book/Practical_Antenna_Handbook_0071639586.pdf
nota : i looking for the :Joe Carr's loop antenna handbook in pdf in order to take a look ...
150MHz !!! I don't think so m8. :)
2.4k likes ;-)
where can i find a can like that with smooth surface?
pringles box may be
he says in the video that he used a toilet brush holder can or maybe ask a sheet-metal workshop for some scrap off-cuts to solder together as a can when U lack resources become resourceful is what I learned as an Entrepreneur
Mr. Andrew pls help us we are still unable to print template
+Shahid Jawaid If you download it and then print it it should work
+andrew mcneil ,There is no permission to download when I have check the detail i found viewer cannot download
+Shahid Jawaid I have uploaded a new copy here is the link goo.gl/GJrrUX
+andrew mcneil Many many thanks, now its ok i can download and print
It would seem to me that you could save yourself a lot of grief if you gust made a printed circuit board for the elements as opposed to dinking with the plexiglass.
Great video Andrew, one question: I need to connect 2 bridges over a distance of around 20 meters with line-of-sight (no obstacles) will this antenna be good or is a bit of an overkill and could use a smaller one instead? thanks
Just peel off directors as you need.
Just use PCB
Here's the question: How could it work unless you have a key: Perhaps if you live close to a Mcdonalds and you know the password because you took your laptop there and used it but what if you don't live close enough to a Mcdonalds or a fast food place or somewhere that there is No way you can get the key or password. They are all LOCKED today. How can you use their internet? No one will answer this. They all just give me a simple answer like "It works", but they don't say how they get into the password. So before I go to the trouble of building one Will you or anyone else answer me andrew mcneil?
The assumption would be that you have valid legal access to the network you're connecting to. This is extremely handy for connecting two sites or if you need remote access to a network you already have permission for or own.
We have tons of free WiFi where I live. It's not secure using other People's WiFi anyway. There are ways to snoop, while you are using Public WiFi.
jg
Hello I am from Argentina and I wanted to ask if that type of antenna used to increase cell signal in my country is gsm thanks
Not as it is no. You would have to re calculate all the measurements for your GSM wave length.
different carriers use different frequencies. call your carrier or cell phone manufacturer to determine the frequencies used by your phone. also the internet can be of use in your research. look up the carrier and/or model/make of your phone.
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 .
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
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?
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 ...
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.
how much of an improvement would you get out of this pointing it into a parabolic dish, something like a used satellite TV receiver?
Fun idea, have you ever added a schottky diode (1N5711) and connect it to one of your antennas in order to capture power from received signal and the diode will convert the signal/power into DC power! you could even add a single led to the diode/ant and it should light up. Thoughts?
Its called a rectenna
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.
How exactly do we use a template of we don't have one?
Do you maybe have measurements?
I cannot download the pdf to properly print. With the current permissions I cant print it from the web either.
+Ian Steedman I have the same problem.
drive.google.com/file/d/0BzmJxxD-Z4B6NTl2dHZnUDFZWEE/view
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.
These Antenna is good for DATV Reception and Transmission with a Adalm Pluto SDR!
Great design for indoor use. Don't use it outside though - rain on the tube will wreck the gain.
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?
Sorry, but are the positive and negative poles shorted? The tape you weld it both above and below ...
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?
Andrew, in "The Wifi Gun Does it Really Work?" you said that shorting the reflector to the active element (center to braid) would cause harm to the active equipment - agreed, and reduce efficiency, also agreed.
Yet you have done just this, shorting centre to braid since the two sides of the aerial are connected by the vias. I was anticipating the braid being connected to the can/reflector. Am I missing something?
The vias in the driven element are being used to form a folded dipole, lowering the chance of messing up the tape by cutting it in half to form the two elements. (en.wikipedia.org/wiki/Dipole_antenna#Folded_dipole)
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.
Can you make a PDF with meassure of 400 to 900mhz for same type antenna???
wow,,clear.concise.youre a gem,,,,,i dabbled with ham/cb radio in 80s..im looking to build a dab yagi,using tv aerials,i cant remember the formula for arriving at sizes for beam,reflector,emitter.directors..it was wavelength divided by 934 ??? or something?,,,,,my son lives approx. 75yards(in old money )lol.away,he cant afford internet,so id like to build a cantenna. would it be worth doing 1 to transmit from my house to 1 to receive at his? its unobstructed view ?could lin e them up with laser pointer ?,,,again thanks for being so good ,,,jimmy
What's the name of that white plastic small screw sir?
andrew mcneil: What kind of device are you plugging this into? Laptop, desktop etc. etc. ? Where are you plugging it into? USB? Some WIFI antennas will fry your internet card. Have you solved that problem with this antenna?
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.
0.57 seconds in, 150MHz? really. A dipole at 150MHz is 1 foot, 6.7 inches each side, ie 3ft across. These elements do not look like 3ft.
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?
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
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
what if i will gonna use PCBoard, does it work?
Good job! nice and simple design. Can this type of antenna be used for transmission? (also with focused high Db "beam")
Yes will work just fine
andrew mcneil Thanks for the quick reply
Do you think you could also use glass for this project? and like the yagi gun could you just keep adding elements?
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?
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!
sir you don't mention this video distance and wide and how long size. please in from me.
Also see how the elements collect all things also and how, where connection and that after the result and speed test where? please description all elements and connection
not wanting to sound dim, but why do we short the earth to the signal on the SMA/BNC connector?
Old video but pretty sure this was an open dipole feed. If you’re referring to grounding the waveguide then that is essential
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!
or can i use 3 soda can and put it together?
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.
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?
Another source for copper tape is a stained glass shop. If they teach you how to make stained glass, they have the tape you need
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?
Do you have a template for 1800Mhz? Would be useful for 4G LTE in rural areas.