2 4GHz Cantenna
ฝัง
- เผยแพร่เมื่อ 11 มิ.ย. 2015
- Here is my new version of the classic cantenna/waveguide. Perfect for enhancing your Wi-Fi signal, wardriving and penetration testing or situations where you need a line of sight connection over a long distance. I always take one on holiday and use it to check my email from my balcony and not the stuffy internet room; in fact the last hotel I stayed in had a small charge for online time, the hotel next door did not!
Frequency Range 2.4GHz
Beam Width 30 degrees
Polarization horizontal
Gain 11 dbi
50 ohm
VSWR 1.5:1
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Email: andrewantennas@gmail.com - วิทยาศาสตร์และเทคโนโลยี
nice work keep it up
Great tutorial mate, You would love a rivnut gun for these. It would make it really easy to add tuning rods or mount the tripod.
If you're taking into account the 7mm recess in the bottom of the tube and you're working to 0.1mm accuracy, you'll want to account for material thickness as well, probably around 0.8mm which is significant.
Using a (fresh) lobster and crab paste tin epoxied to my neighbour's sky dish I am receiving data from the Viking 1 spacecraft that left the solar system 18 months ago.
I couldn't stop myself. I have enjoyed your videos and have subscribed.
An SWR of 1.5:1 is actually NOT bad. Anything under 2.0:1 is acceptable. I'd ditch the heat-shrink tubing and make the pass-through hole for the driven element a bit bigger. The insulation forms a capacitor which detunes you antenna.
Good day. Prompt executable antenna sizes. Thank you.
Bless you for making these videos sir! I'm trying to locate the 21 swg wire on a budget. Is there something I could pull it out of? Like rg--59 wire or rg-6 wire? I'm pretty sure cat5 wire is 22 or 24 awg so that's a no go. I'm reading the solid core of rg59 could be 20awg (. 8128mm) which is very close to 21swg (. 813mm). Have you used the solid core out of an rg59 cable for a driven element before? Also I'm on the hunt for a stainless toilet brush holder and they only had chrome at Lowes, and the indention doesn't appear to be the same as the one in your video. I went to Lowes, home depot, Walmart and bed bath and beyond. No dice. Do you have a link to one with the correct dimensions?
Great! I see these are still available to buy on your site (on backorder?). What is the estimated delivery time?
nice man, I've just build the biquad antenna out of your design, and just have a question, what gain you get from the biquad antenna vs the double biquad, is it worth it? or should I just jump to this cantenna design??? ...btw I don't know why others designs didn't work for me, but this works perfect just at the middle of the 2.4 GHz frequency
Another great video Andrew .. Can you please tell me what will be the wave length for 2100 Mhz 3G connection if I want to make one?
I build one today and had a lot of problems with soldering. Because my toilet holder was really made from steel and the solder does not stick very well. But for the cover i found a good solution. The yogurt covers from the 500ml cups in germany fit exactly on the toilet holders. Looks after the paint very professionel. Thanks again for this very good antenna Mr. Mcneil.
Yes I have come across this myself they don;t all seem to be made of the same mix of metals. M2.5. 4 mm long screws also work well with a 1.5 mm drill bit. Do you have any pics Chris?
Yes, here is a picture. Sorry i always to lazy to clean my windows.
www.pic-upload.de/view-35404714/IMG_20180530_201158.jpg.html
That's very nice and your windows are cleaner than mine :-)
Thank you. Makes me happy.
I forgot to present my solution for soldering the steel for other peoples. I used soldering oil (Lötöl) from a company named Fohrmann ( payed today 7 Euro in my electronics shop) and it is especially made for things like that . First place the oil on the steel and than pre-tin this area, after that you can solder on the sma connector. I give it after cooling a little more strength with epoxy.
what do you think of using yagi and cantenna together ? like the guys at simplewifi did.
Sir I am your biggest fan! I've dreamed of testing and designing as you are! hope to be there some day soon. Please I have no real experience I made a cantenna. And connected to a router with tomato in client mode. The router has 3 antenna port posts. right middle left , i assume one is for 5ghz i'm not sure how that works. Do i need multiple cantenna for optimal performance and range? or does it help at all having a second cantenna ?
when you buy this cantenna from your website does it come with the wifi adpater??
Hello Andrew,
I've build some parabolic antenna's for 10Ghz (3cm ham band) but i'm new to Wifi. Once You have your cantenna ready you can plug a wifi card on but what kind of card is it? They sell a lot of different ones; do I need a wifi extender, a wifi AP, or some kind of a repeater to connect to the cantenna? If you use it as a receiving antenna do you connect a cable between the card and the laptop? It may be seem obvious to you but I don't really understand the 'things' needed between antenna and laptop.
Couldn’t you wrap the solder around the back reflector and heat it up? It’d be much more uniform
I recently bought a proper stainless steel toilet brush holder and set it up pretty much exactly as shown with very poor results, should I be using tin or copper for the can instead?
Kind of sad, I triyed to access your website and it say that is forbidden...
what software do u use for reading wifi access points signal strength please?
Why cant you get the SWRs down?
What is the best antenna for long distances?
Hi! I'm thinking about building a cantenna but I'm really scared about the reflections from the cantenna - those will destroy the wifi router. I don't have any equipment to calibrate the cantenna so I'm thinking about running a continuous upload test while I'm inserting screws inside the can like you did. What do you think about this ideea? Could you please do a video about this? My ideea is that when I will find the biggest upload speed the reflections will be really small (and so the SWR will be at a minimum).
Both devices must transmit with adequate strength. Increasing the range of only one receiver / transmitter does not give much ?
how does Andrew solder onto a steel can? I can't do it.
Hi Andrew. All your Cantenna videos use coaxil cable. I am not able to find a computer, or router, with this plugin NZ. Is it possible to connect an ethernet cable to the Cantenna?
u ship to anywhere ?
Hi Andrew, do you still have these up for sale?
are you still selling these andrew
Where can I get the plans or instructions to make the antenna?
How do I buy one of these from you?
Hi, I was wondering how you calculate the standing wavelength within the waveguide, I only know how to calculate with regards to the wavelength in air. I have heard lots of different numbers for the same dimensions of cylinder but I can't find what formula you would use to calculate the distance from the back reflector or the height of the driven element, I only know them in terms of the standing wavelength within the waveguide (which I can't calculate).
Thanks for making your videos, they have helped me more than just about any other source to understand antenna mechanics.
Cheers.
May I be so bold as to recommend to the expert a few enhancements? Can should be diameter 85mm, element 3mm wide, 30mm long, 75mm from rear of can, and a rod soldered into the can, 33mm long and 15-18mm behind the driven element.
I got Kingspan in my wall and it reflects my wifi Signals I have a repeater but it is crap should I get that TP-Link Router and do what you did with the Cantenna, It has to run off PC > RJ45 > Repeater -------WiFi------ Router
Andrew's driven element is 51mm from can base, others do 55mm and 42mm. Which is best?
Nick Horrex You can use these tools:
www.wikarekare.org/Antenna/WaveguideCan.html
www.changpuak.ch/electronics/cantenna.php
I don't know whic one ise reliable but its better than random.
I want to build that antenna but I have some trouble finding 20 awg (0.8mm) solid core wire at a decent price. Since I already have plenty of 0.65mm wire, would that diameter be sufficient? Thanks!
William Belanger I find 0.8mm wire in a coax wire for TV. Maybe that helps you out.
Why doesn't the SMA connector itself count as part of the length of the wire antenna?
He's probably already included that.
I build these, too. I use "N" connectors on mine. I've made a biquad, and now I have a double biquad, I use as a feed mounted on an old satellite tv dish, which boosts the gain up 2 or 3 fold. You can mount the cantenna waveguide as a feed for a dish, too, in fact the feeds on them are waveguides, only they are smaller for the higher frequency used by satellite tv. Just put the can's mouth at the same distance from the dish, and at the same angle as the original feed. Keep in mind that the dish is a reflector, so to work, the dish will have to be at this angle / to be horizontal.
Would a usb wifi adapter work inserted in to the can instead of the copper element he uses ?
Andrew, I apologize, but I'm a tad green when it comes to tech stuff. If I have this antenna plugged in, will it strengthen the wifi to one unit (laptop,smart TV)? Thank!
+Mario Moreno It must have a SMA connector so you can hook it up to the cantenna or you may want to look at a repeater.
How long it will access?
did i miss the length of the can, is the length important. great show. i have a router that has 3 antennas, and it is dual band, can i take off one of the antennas to put a cantenna or one of your others for either 5 or 2 gig antennas.
George Gardinier Hi George the length is 270mm and I have done the same with routers in the past. I don't know why manufacturers don't make a router like that, 2 omnidirectional antennas for blanket coverage and 1 directional for a specific area.
Materials sir?
I can't find the exact same connector anywhere, sma -rp to which you can solder driven element to
www.ebay.co.uk/itm/222098590300
stumbled on this video. lf there is a router 20m away next to 3rd adjacent house , without clear LOS due to multiple in between walls of linked houses, does Cantenna still work? I tried to use WiFi repeater but get very weak signal
If you can get a weak signal (1 to 2 bars) by regular means (omni/internal antennas) then a cantenna will definitely work very well!
I use one myself. All I did is plug a usb wifi dongle into the hole of the cantenna (with correct measurements) instead of doing any wiring or soldering. Works like a charm.
You *might* have to play a bit with the dongle inclination inside the can for a better reception.
What if my cantenna is too short?
I have a nice can that has a diameter of 75mm and is 110mm long. I assume that the RX wouldn't be affected too much and the TX radiation pattern would be more spread out, is that right?
Alex You can use these tools:
www.wikarekare.org/Antenna/WaveguideCan.html
www.changpuak.ch/electronics/cantenna.php
The use of a stainless steel toilet paper canister surprised me because stainless is a poor electromagnetic material; why does the stainless work and would a thin copper sheet work better? You do a nice job on your videos, thanks for taking the time to share your experience and knowledge. I would like to learn if this could also work as an antenna for a 900MHz GSM signal repeater. Thanks!
+Mark Main he says that its not actually stainless steel
+Mark Main I think you're missing the point of the canister, that being not to conduct, but to reflect. The can itself is meant to direct the beam while also minimizing the amplitude for a given wavelength, the same as a standing wave in a pipe. The conductivity of the reflector is less an issue than it's opacity to electromagnetic waves.
irishman, you just got a friend in Sao Paulo. whatever I may do, please ask... I was raised in Brighton, UK. tah tah... 🇧🇷
thanks bra, always a good thing to have another groupie on the team roster. what u may do is u may send some tax deductible capitol to my paypal, pm me for exact address. tah tah to u also, no homo.
I have a question. I think antenna is not the big deal, the big deal is Tx Power? If i use this cantenna with 100mw wifi card i think it doesn't increase signal a lot?
RichBristol1 thats logical. Thanks!
Видимо в США о поляризации волны еще ни чего не известно, а так же при таком диаметре банки будет достаточно половины длины если не меньше, если добавить раструб на конце диогоамма направленности станет лучше
Hi Andrew.
I know it's just a can but here in sleepy hollow (Australia) we cant even get that correct for the dimensions you recommend, however I can obtain 90mm pvc. Could i use PVC pipe with the inside lined with say copper tape or a sheet of tin and a lined cap on the end?
Thanks
Walt
Hi you could do that but the diameter does not have to be exactly 90mm. You could use something say plus or minus 10 or 20mm without having to change the length of the driven element. But remember a narrow tube makes it more directional and a wider tube increases the beamwidth.
Thanks Andrew,
It was your suggestion that the above mentioned dimensions would be ideal for a good Cantenna that lead me to search for the particular size can.
So a larger can would yield as good results but be less sensitive on the directional aspect?
Walt
I would cover the outside of the pipe as the PVC would have very little effect on the signal and it will be much easier to cover the outside.
Yep that could be a plan.
I also wondered if the back of the can was parabolic instead of flat, Would the cantenna probe receive more signal?
Just wondering if it could be improved.
I have tried that on a small scale but I did not see any advantage to it, Although it did lead me to come up with this: th-cam.com/video/2bc4Gi6Ib1s/w-d-xo.html
I'm confused,can anyone please how do we get measurements?
How far does the driven element need to be from the back for a 100mm diameter because online calculators don't allow a diameter this big and what about the length of the driven element?
43.9mm but 100mm is a little to large
Why do you seem to like the 100mm cans? Every online calculator I try seems to think that that's too big a diameter. The optimum is 80 to 90mm diameter.
Next question is, what happens if the can is shorter than 3/4 wavelength?
These are 92 mm the best diameter for a 2.4GHz wifi signal is 82 to 98mm. The calculators or OK but if you study this area of RF you will soon outgrow them as they are very limited. most will tell you you can use 74mm and you can and it will work but it is crap when put next to a can with 82 mm. You can use a can shorter than 3/4 but technically it is no longer a wave guide and just a reflector and is to short to guide a wave to the driven element.
I want to build my own but only have a 193 long and 127 wide
You can use these tools:
www.wikarekare.org/Antenna/WaveguideCan.html
www.changpuak.ch/electronics/cantenna.php
I don't know which one is reliable. But you can try them and choose one.
where can i get this to buy ?
mortal4life andrew-mcneil.com/
Will a pringles can work since it's cardboard on the outside?
Only in the movies
The thing is every wifi signal is Locked today. I don't see anyway that this would work for that reason. What do you say to that bro?
Kali Net Hunter
Please can you tell me where to make the hole in a pringles can??? Thanks
The best advice I can give you is don't use a Pringles can
@@andrewmcneil so what would you recomend?
Thanks for the video.
I have a remote underground garage which is remote from the flat. I am not able to get a cable from the flat to the garage. Do you think it is worth trying to get wifi from the flat to the garage by using a cantenna at both ends, one in the flat and one in the garage.
The garage is around 80-100m away line of sight
I assume i would also need two alfa cards AWUS036NHA or i could do a double using the TP-link TL-WN822N as you have shown in another video.
How does wifi 2.4 or 5 when you have not got line of sight.
never made an antenna but feeling excited to give it a try.
If you think this idea is a non-starter can you recommend another solution i can research.
Thanks in advance
Could you use single walled stove pipe approx. 102 mm?
I wouldn’t use anything over 100mm, my friend. Bandwidth goes to s*** around thereabouts I’ve found. But I have used drier vent tubing (little smaller l) to great effect. If you have the “folded” seam on your pipe, unhook the seam and use a straight edge to back the catch-fold up a little. Good luck
I fail to see how this would be useful. All access points I’ve seen are password protected.
Does the can need to be metallic?
Yes
now the question is...does the uk use the same diamater toilet brush as the us lol
Not really. Most the US ones I found were 4 inches. It takes some time but I found one that is 3.5 inches
@@clion520 fwiw, amazon.ca sells the exact one AM is using for around $10.
sorry...not exact...bottom lip is only 3.5mm
I can not access your website, i get "Forbidden
You don't have permission to access / on this server."
I have shut it down will be selling using amazon prime in around a months time.
Hi Andrew - will you be selling these cantennas on Amazon in a couple weeks then? I'll put off building my own if that is the case. Thanks
Do you have a link to your amazon account page yet? (even if it is empty at the moment)
Following up on this comment, has there been any progress in creating an Amazon account yet? I'd love to purchase some equipment from you.
Yep - there's a lot of interested people. Even if you say it's 2 months away an answer would be great!
Andrew, will this help me pick up a signal when I'm in a RV Park? They provide wifi, but it's often weak or very far away. The park provides the password to log in to their network. And do you ship tot he US?
+Mario Moreno Hi Mario yes it should if you have line of sight it will easily do 2km I always take one on holiday with me. It is £10 shipping to the US but it is slow and not tracked.
damn them 4 hole connectors are expensive
Just jerk one off an old router. I get em the linksys WRT routers for $1 at my local thrift and that’s two screw on connectors a piece. Some are N-Type and others are SMA. Same with the pictails that reduce them to a uf.l connection for plugging into your circuit board. Have fun
Hi , I think that you forgot to add the thickness of the back of the can to your calculation before making that hole !! sorry I"m not an expert .. just a fun .
This is fascinating. You need a metal can, a bit of copper and you can do illegal stuff!
there is nothing illegal about building/using this antenna
Mày nói nhảm nhiều quá.
blablablablablablablablablablablablablablablablablablablablablablablablablablablablablablablabla, mas al grano no muestras de donde sacas a que distancia va el dipolo, cual debe ser su largo según el envase, no muestras conectando la cantena al pc, 23 minutos en nada
Good stuff. Too much explaining though. Gets tiring.
You dont need to talk so much...
Too much bla bla bla bla!!!!!! Mate!!!!!!
STOP STARTING SENTENCES WITH "SO"!!!!!!!!!!!!!!!!!!!!!
a bit of an excessive reaction, innit