The Wifi Gun Does it Really Work?
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- Опубліковано 4 сер 2024
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Email: andrewantennas@gmail.com - Наука та технологія
Good video Sir.Andrew. i'm excited to see you bulid your own version and design of this type of antenna
Wow ...when I saw the original video I thought exactly what you said. It is short circuited dipole. Then your video appeared in my tablet and you really explained the bad thing to that design. Only for a recomendation...I would use copper board and etched the center so there will not be a conection to the ground plane and reflectors. In order to achieve the long range of 3 km they will need and amplifier and a duplexer. If you or someone have a schematic or a design I would love to see it. There is a video where someone took a crystal from a old mobile to use it as a filter ....it will be interesting to see the modified gun with an amplifier and test the performance and gain....thanks for the video. I loved your scientific approach to the subject. Regards...
Thank you for sharing your knowledge and for the experiments!
Excellent!!! I Iook forward to seeing your design.
Very interesting. Thank you. The only practical way to get things like this working correctly is to measure the VSWR. There are other ways but this is the easiest , simplest and cheapest so far as I know.
great video, as is the reference video it discusses, and the comments below; They all show what a complex field this really is!
I saw the video you are talking about and I knew there was something not right but couldn't think what until you put it right here. You may have saved my router's life! LOL
Thanks for testing that for us, good video.
Thanks for this, I was wondering why the other videos I saw seemed to short out the cable.
4:36 to bypass the yacking and to get started.
Thank you.
THANK YOU!!
Also. In NONE of the tests did he try to move the focal point to tune into the target. This is just bunk show.
I was thinking they should be isolated, but i have also seen many antennas that when tested under DC current will appear as a dead short...cannot say which they used, but under your practical test, it was at least shown to work BETTER when the driving element was isolated. I like it when people independently test stuff that people post as being the next best thing since cold fusion.
Great video. I have just made one today:) I have set the first 3 Only 10mm Apart & then 32mm to the 4th one at 38mm. I have just done a quick test on my phone & the results are very good. My phone on its own only picks up x2 Direct Wi-Fi Signals & x7 Normal Wi-Fi Signals. When I attach the Gun I'm getting X7 Direct Wi-Fi Signals and x18 Normal Wi-Fi Signals. I'm trying to connect to my local Mc Donald's:) Sometimes you just have to try these things out to see if they work:) Great video.
Thank you for taking the time to make this video!
Regarding the original video I was also wondering if there's any merit to the way the phone's antenna got connected to the "wi-fi gun'', I mean that repeating bending of the signal wire at 90 degrees to form something like a spiral?
Hi, great video as always! Have you ever considered making an "antenna basics" showing the physical principles behind antenna design?
Too funny, I just watched their vid late last night... and I immediately thought of you. It would be interesting to test on your equipment against your compact yagis.
loved it andrew
Great video. Thanks for your insight. Just wondering if you have a video that shows how to connect the co-ax to a lap top? Thanks!
I hope you'll also test his 3G/4G version. And I'm really curious about what he calls capacitive coupling and if it really works.
No it does not work but you can find people selling them online. Not sure if that part of the video was a joke lost in translation.
@@andrewmcneil It went over my head! Cheers for the info :)
You should try it. It seems that the result depends on lots of factors. Personally I was surprised. I've assembled the antenna from some rubbish on my backyard. With the antenna I've got significant improvements in connection (though I have 3g antenna but not wifi one)
I am glad you readed my coment and thanks for this quick video.
Great info. Do You have recommendation DIY WIFI Such as this one?
Hi
Would just like to know when you mentioned Office Repeater, just how far away is that from your location?
Thanks in advance
Thanks for the Video Andrew! I am a fan of your channel, and i thought about asking you for a review of this antenna. I liked it because it is very easy to build and robust. Nice tip about isolating the driven element from the back reflector!
Its perfectly possible to have a DC short on a good antenna(PIFA or slot antennas as an example). Its the impedence at the frequency of operation that matters. Clearly isolating on this improves the match, but it isnt a universal rule.
The problem is when connecting to an output that has any DC bias for driving an external amplifier. Any antenna that is a DC short will damage the output.
Very very informative. Thank you
I like your magnetic wall mount tool holders
Cool! Thanks for this post .
Can you combine an open dipole bow tie style antenna with a cantenna?
Would really love to see that in a video!!
Hello Sir. Could you please mention the cotrect size of each circular plates, distance size between plates, thread bar size n lenghth etc. Thanks for your help and support 👍
can you show us how did you modified it ? i didnt understand where did you put the heat tube
so, if i may know... which design do you like the most?this one, cantenna, or bi-quad parabolic?
cause i'm lil bit confused to decide which design i'm going to build.
I have a question if i can use PCB boards to build the antenna
NO, the driven element is shorted to the boom at DC only, but not at RF. This is the same with all the elements, the centers of them are all at minimum current points, so the only difference between grounding them or floating them should depend on how far from resonance the measurements are, including any velocity factors. If they are at the perfect lengths and spacings, their zero current points do NOT see the booms at RF frequencies.
When we go South to avoid the frigid winters of the South Dakota high plains, we stay at a nice little rv park in a tiny Arizona town near Needles California. They furnish wifi but it is slow and not at all reliable. I finally decided to buy a sort of booster, and that helps a quite a bit, but since it is inside our RV, which is made up of steel 2x4's with fiberglass body, a lot of signal is lost. I have been looking at hooking up a small outdoor antenna and runing it into our RV then hooking it up to a twin antenna router to be rebroadcast in the unit. Would this antenna design be OK? I did find a yaggi antenna and purchased it a few years back, but have not hooked it up as of yet because I did not have proper cabling capability. It came with some sort of coax but I am not sure exactly what it is, not 50 ohm or cable tv, someplace in the middle. The seller said they had it mounted on a sky scraper window ledge and used it to transfer files from one building to another some distance away, but had upgraded.
Mr. Andrew Can you make a video where you explain necessary measurements for a Cantenna ? For example I have a Can with 10 cm diameter but need precise measurements (Can's length, where to put the driven element.....) I hope you do it please!!
i'm not andrew ( his smacking when he talks bugs the piss out of me) however i can give you this: archive.oreilly.com/pub/post/antenna_on_the_cheap_er_chip.html
their is a part list as well as directions. :)
Not forgetting a 50ohm termination is probably more important. Testing the driven element to Director with s DC multimeter is not a valid argument. It's whether it presents a true 50ohm load. Look at a folded J pole antenna. It's a DC short with an infinite impedance at the antenna tip. However the 50ohm feed is near the bottom of the antenna and a DC short. In technical terms a transformer is a DC short however it's not to AC, ......RF is AC. Ok it's true your not going to get far with the driven element shorted in this way however I think the fundamentals of antenna design need exploring a tad more. Example your average Sky dish has an antenna about 15mm but its nestled inside the feed horn (can-tenna). Ultra directional however has a range of hundreds of miles potentially. Why not check the reactance, do a little J notation. 2m EME is a round trip of 750,000km and 23cm EME. Since 2.4ghz is in the 13cm band the potential for 10,000 miles is achievable IF both designs are capable. Having an excellent antenna at one side and the other possibly using a vertical to your circular polarisation antenna is 30db down perhaps as much as 60db. Build the design again and test the pair pointing at each other. Measure the thermal background noise and run this video again. Or Google 13cm EME
www.vk3nx.com/13cm.html
CodfishCatfish
I agreed , the feed point must be near the center to "try" to match 50 ohms .
Just a comment....the so called gun antenna is like the one used for comertial MDS television cable. The elements are circular because the used polarity either vertical or horizontally. In that way the waves are reflected in any position...that is another problem because if you have a transmission where they used separated transmitters your gun will peek both and interfere with each other. So that is the reason where a bow tye antena correctly oriented will work as well. But with respect to the impedance referred a 50 ohm....since we are talking about high frequencies here and probably people here doesn't realice that these things should be designed as transmission lines using what is called a Smith chart and a process called matching the impedance seen at that frequency....this is not an easy stuff to be explained here unless you have seen the problem as a transmisión line. With this I just want to say is not to put a 50 ohm terminator plug....the antenna should be matched to a certain frequency to get the most possible gain. But considering this is a WiFi transmission where they used many channels and in your wifi router you may specify which one to use , the you should take the consideration to cut the dipole dish diameter acording to resonate a that frequency . I think they use 1/4 lamda for that. Kind like the dipole on the LNA of the parabolic dishes used in the 80's.
So forget about 50 ohms terminators and design the size of the dipole cutted to that channel frequency. Or forget what all of this discussion I just mention....😊
hi Andrew, thanks for this. I've always been interested in the "how and why" so I have a few questions: 1) do the plates need to be copper? is the conductivity of copper a benefit? 2) you say you've isolated the main plate but they are still attached by that wire? 3) maybe a bit off topic but I have two channel master tv antenna mounted on a mast, one above another. They are on a 30 degree angle from each other (I've experimented with them parallel and up to 90 degrees to each other. 30 degrees seems to work best) Each one is about 2x2ft so I have about 8 SF aiming in the direction of the sources, whereas a yagi design has very little frontal area but perhaps has more of a chance to lock the signal since its longer and deeper. Which is a better set up? thanks.
Thanks for the detailed video. I would live to build an antenna and have done a fair amount of research and always got confused when it came to the elements. Out of curiosity, the video you're referencing bent the end of the wire into a square spiral and held it near his phone to increase the wifi range of his phone. Is that possible?
Same question bro
Question. Why is it that on a yagi antenna it's ok that it is shorted on the drive element?, ... and why are some yagi's parasit elements not connected together. I always want it to be like how you modify this.
friend, I just saw your video ... 7 months later you can tell me please if the antenna works or not, I have a serious reception problem and I want your opinion. Thank you.
Wow Salute to you Andrew. I cant believe you followed up on this antenna. Great Job PS: Does this antenna beat your double biquad in gain or is that still your bread and butter antenna?
Please I wonder, if the distance between all discs is the same 30mm? what about disk 90 and 68? thanks
Hey could please upload a construction guide for the parabola disc + cantenna ?
My question is... I notice the copper plates are isolated between the wires.. or seperate.
but wouldnt the bolt and nuts cause interference?
Do the 2 main non parasitic plates need to be insulated from the rod>??
or does it not matter
The antenna is actually narrowband (narrow range of frequencies) so WiFi download and upload speeds will be different.
FDD (Frequency Division Duplex) uses separate frequencies
Nice save!
The antenna needs to be 50 ohm for communication. But Reference antenna conductive and it 0 ohm resistance. Internal impdance of IC 50 ohm and the antenna has to be 50 ohm for the maximum power transfer.
so since a cantanna has about 10 to 12dBi antenna gain, the improved "wifi gun" has aprox. the same gain of 12dBi?
Thank you for the video and your suggested mod that improved the design. Although, i have a couple issues with several assertions made.
1) DC short != AC short. AC will have an impedance with either inductive or capacitive reactance. For instance, it is possible to connect both shield and center wire of a coax to a copper pipe with their connection points separated by 90 degrees, and have an infinate impedence at specific frequencies.
2) The possible distance. You yourself pointed out you were shooting through brick. Then in the original video, one can see it was winter. Low humidity means low attenuation, and no leaves on the trees. And then the original video had two of these antenna roughly pointing at each other. And lastly he erected one antenna on top of his roof. All I am saying is that one might be able to get long range under very special circumstances, and it would be helpful to list them but advise that many things can detract from optimal performance.
A short is a short... Good luck.
I am surprised they even got a signal out.
I have been looking for a good Wi-Fi antenna that only needs to connect with my router that is only 350 feet away. Do you know of one that I can buy?
The disc size can be as many wavelenghts as you wish which in this case has so many factors as to go with best guess.
Hi just wanna know if i can substitute bronze plate with a cardboard coverd flat with aluminum foil? Since theres enhanced community quarantine here hardware shops are closed.
Im tryna reach a wifi rent from a distance. Thats why i wanna try this so that i dint need to go out just to have a wifi connection
Please reply
excellent!!, how can i build a 5ghz wifi directional antena for rocket m5 ?
hank you for the video
Good stuff, Good video
Could I take something like this or the cantenna and hook it up to my drones controller and get longer range with it? ? I have a phantom 3 standard and it uses 2 different wifi signals I believe. One for video and one for the controls.
Это узконаправленная антенна, учи матчасть.
hello sir andrew i actualy made the wifi gun it works in very short distance. i did not get the signal of my target wifi source. perhaps you can share to me were can i buy a better wifi gun that has long range of getting signal. im tired and frustrated already . thanks
What phantom said...same reason long long extension 120amp cord developes resistance and creates heat/fail
This is a Yagi antenna but can this be made polarized ? Rh or LH polarized. This is in connection with using this antenna for the current EsHail satellite. It needs a RHCP signal
Why does the coax antenna touch the back reflector AND the main driven element?
how do you hook it up to your computer and if the main dish is to be isolated from the rest why do you need the other dishes?
So does the screen of the coax connect to the reflector in this type of antenna?
hi very nice info. please tell me does biquad antenna is damage the wifi adapter too because it is also soldered both end of coaxial cable on biquad antenna. sorry for my bad english. i am just learner.
The biquad element is not connected to ground, Ground is connected to the reflector
Yes you are correct SJP, I let my keyboard fingers run away before engaging brain :-)
I totally was thinking about you when I watched the video also. I also thought about a University that constructed a longer yagi like yours, though similar to this, and I don't recall the University off the top of my head.
Cheers on the review! Much appreciated. I was thinking using your longer yagi on perflex with foil design specs in this style you just demonstrated in the video. My thought as I noted in their video was impedance matching (steel seems would be higher resistance), plastic rod and screws was my first thought or of some sort threaded rod like copper though not so common as maybe using brass and the reflector, i.e dish or trough if in more like your bowtie antenna shape or elliptical. Makes me wonder what a spiral conical antenna in a strip would act like versus a wire too. Thanks again for the video review! All the best!
Makes sense to use the more equivalent yagi in a can design for compare and contrast I'm thinking. Most aren't licensed amateurs or professionals I'm guessing and laws as well as enforcement varies depending on jurisdiction.
I want to connect to my university which is 1km away ( straight line ) with 5Ghz AC wireless card. what would you recommend ?
Andrew can you please post in PDF the 2.4GHz directions and materials and measurements😁
02:16 How about a panel antenna? How would you think it performs compared to a Cantenna?
can u make a detailed video on how to make it just like that, pls my wifi is very bad from 75m away, if u could please list the things u used and the lengths and widths of the items
thank u
are there advantages/disadvantages to disks vs simple diploe elements?
did you isolated just last copper circle?
i was thinking of making this one but i would like to do it with my Xiaomi Mi Wifi Repeater Pro but its antenna is built to it (unlike from the video that you can disassemble or remove the amtenna).
Would it be fine if sattelite/cable tv wire is Twiddled to the repeater antenna directly? can i get signal with that (of course with the same directional antenna design)
please i hope and ill be very glad if someone read this and answer my question.
(sorry for the wrong grammar)
Thanked forum good info.
How would using an insulated boom such as a wooden dowel affect the antenna?
The other vid was outdoors in a rural area that's how they got the 5km. In your vid you're indoors. So what your saying is it does work and it works best under 5km.
Thanks for this. I really did think their content was real, albeit a bit exaggerated and even thought about the short on this antenna. I dunno why they decided to show a non-working piece of shite when all they had to do was isolate that plate.
Subbed :)
I also built one and couldn’t get it working I think there needs to be rubber in between each copper ring and the boat they’re attached to is steel that has way to much resistance. Solder a small wire to each individual plate through a hole drilled close to the bolt and you can use a plastic bolt but either way, I feel the steel bolt is slowing the flow of signal to be cut from Wi-Fi. Small wires for small voltage right? My theory is too much resistance in the steel stop the flow of signal from Wi-Fi
Hi, is aluminium sheet okay for the disks ?
Did you finish the crosshair yagi? You definitely grabbed me on that one. I have made your other crosshair antenna
s and they work fantastic.
COPIAH COUNTY BLAMING QUICKIE YEAPO ALL IN
Could someone please make a list of all the materials/best materials to make one of these and their measurements? I'm thinking of creating one for a little project to keep me occupied, it would help a lot, please and thank you.
EDIT: It would also be helpful to know how to attach it to a router, please.
Can you provide pdf for this yagi antenna with your suggestions ?
Is this saport 2.4ghz WiFi?
I did enjoy the video and that car was just mad!
PLEASE make a discord server for us
That car was like something the props department would get for a mad max film!
I too like Kreosan videos very much for the entretainment propouse. =D
andrew mcneil is your site down?
Replication Andy ;-), please can you offer some advise ? ua-cam.com/video/KIwJlbqFs0M/v-deo.html
Is there any chance of doing a 700-850 MHz cantenna at long range?
Would this concept work for cell phone signal? Here I get 1800MHz and I´m tryng to get signal here in a rural area
Hello.
I want to know how many millimeters is the thickness of that copper?
I need to know
Hey is your shop down right now?also any reason why you don't use Alfa036nha?just curious
Please test the sunhans 4 and 10W amplifiers. The 4W seems to work. But the cheap Chinese amplifiers seem to have a bigger range. But lower WiFi speed
right on mate
Do you know how I could make a Tello drone fly a mile
Can u tell me that ground and signal terminals are short
ET wants his gun back.
What software are you using to scan with?
Andrew what about using a nylon threaded rod and nylon nuts? I've be planning on trying this. Would be great to see what you come up with.
Hi Antony yes I would also use nylon thread and nuts just makes everything simpler
Could you please explain how DC short will damage wifi card? I believe DC short has no effect on wifi card which is AC thing (RF is not DC right?)
the 5km claim was with 2 wifi guns, one on either end
please can you send me file word or pdf of this antina
me wondering how the hell that antenna increases the directivity.
Thumb up as always! Thanks for sharing!!!!!
he said in the video, 500 meters not kilometres .
tl error, it was 5km in english
how can i use it. for network suply Router to android phone?
Please tell me. thank you.
What is the measurement from this to this when Borton it on the boat
Thanks man