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.
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...
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
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....😊
I'm not trying to be disrespectful, but why not test all antennas you made with Spectrum Analyzer to be sure that they run on 2.4 GHz ? It feels like an incomplete video.
prof20 int Agreed! More like use a sweeper or network analyzer. I don’t believe the dimensions are accurate. I have many 2.0-2.5ghz commercial disc rod/yagi antennas and the dimensions are much different. I don’t believe that antenna is properly tuned or optimized for 2.4ghz. A circular polarized helix antenna is much easier and woks much better. You can wind copper wire around a piece of pvc pipe and get a better antenna. Higher gain and a decent beam width. The half power points are more narrow on a properly designed helix design. A >15” long helix can get you 12dbi with 40 degree or less half power points. This disk rod yagi design will never make that spec. Unless it is swept and optimized. Still it will not result in a gain of 12dbi. 6dbi would be a stretch.
So you're saying helix antenna most likely better than that antenna in video for 2.4 GHz? I've made the antenna above and the distance is not great, less than 1.5 KM I have tested it.
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.
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)
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.
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.
And they all build this antenna and "conclude" and "demonstrate" that it works for multiple kilometers. But it can not. Wifi protocol frame time is not waiting for more than 1.6 kilometers signal travel time. It will retransmit and then listen again, not wait enough and retransmit again. But happy to get a tip about the driver isolation. Do not want to burn some holes in wires or parts, so the smoke comes out.
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.
1) Short circuit when measuring DC, not on the RF! 2) there is no current flowing through the central line when RF recieved 3) incorrect measurement, this is hightly directed antenna for the free space, not for the office.
The 5 KM figure was with line of sight and these antennas for both recieve and transmit! I know for a fact this is possible, because line of sight makes a huge difference. I say this from personal experience. With line of sight, i have managed to set up links of 10 km on just 10 mW.
I saw the video again that guy put directional antena on the roof of his house and u have in side of your home so may thats why he have strong signals, and the second mistake you told was right he can correct that .
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.
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.
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.
Short answer: yes Long answer: the entire video Yes its legit, i use a bunch of aluminum tin-can, cord, wifi extender, bolts and nuts the range is extended up to 100sq meters or more
im sorry but you need to understand that it is a directional antenna soo you don't need to base the number of wifi ssid scanned by the receiver what you need to do is to do a range test not scanning the number of ssid by itself,
Impedance is quite important. don't try antennas with bad impedance or obvious isolation. as the op mentioned if you use an amplifier it can burn. baby burn and eventually damage the receiver electronics
original video he put the antenna on his roof also its a directional antenna testing in garage is bios, should replicate the actual video to make it fair
Well now you are speaking about putting shrink wrap on the boom. Well if you go back to the video in question you will notice him cutting down a wall anchor. Which I do believe you may have missed because he did in fact isolate the boom !!!
Make the driven element a copper ring riveted on a non-conductive disc to isolate the center wire from ground. However building this design is a waste of time.
Not tried wifi gun yet, but i have built antenna and used GSM and 3g 4g frequencies and they are really good. They even catch up signals far away 30 to 40 kms away. As this design is yagi model. It may work.And i disagree from narrators some points.You say parasitic elements must be isolated, but yagi theory says that elements have a node (zero rf at centre) so it can be connected to metal boom.
But no the dipole .look for an vhf tv antenna and you will see why the dipole is isolated. Or if you love to strip LNA from parabolic dishes, you will find the small antenna in the wave guide is isolated from the chassis or metal body and has a hole to conect to the electronic board inside the LNA....
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
The thing is every wifi signal is Locked today. I don't see anyway that this would work for that reason unless you already have paid internet and you want to boost the signal.
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.
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
I made similar antena and connect it to router with original three antennas. I disconnected one original antenna and connected this wifi gun antenna. There was no difference in signal range. So not working.
Andrew McNeil. Every wifi signal is Locked today. I don't see anyway that this would work to get free internet unless you already have paid internet and you want to boost the signal with your wifi antenna.
@@bansheemania1692 If it use approx 800MHz . (Harmonic frequency) The same effect of dielectric water resonance as 2.4GHz . I **believe** that it is the root of most cancers in the present day. However in the past, "The continuous of pulse" is too low (only "sound data" transfer for 2G ) In the present 3G-4G "the continue of pulse" for computer data is too high (ex. wifi 11Mb/sec) and this also has more affect to the "resonance" more than "intensity" of beams.(However "the intensity" for "resonance affect" must atleast beyond in some level see mathematical about Orders&Series then multiply by time)
@@bansheemania1692 It can cause no harm with Li-fi that use Lights or Infrared(GHz) instead of Microwave water resonance 800,2400MHz) PS.Except sending the red Light (Д=700M or F= 4.3x 10^17Hz) (c=FД ) in resonance frequency like 800Mbps or 2.4Gbps or harmonic still harmful
@@bansheemania1692 5G is a military weapon.. Plain and simple. It's the exact same technology used at the airport with those full body scanners. It's harmful. As is 4G 3G and the rest. You usually don't see the damage for 10-15 ish years. LED lighting is another creepy weapon that can pick up crystal clear audio ruclips.net/video/hliHBeC1sco/видео.html Any claim that 5G (or any G of internet thus far) is not harmful or that it's not tested, is BS. The damage these things cause has been known for decades. The frequencies used with 5G are the same frequencies used to induce diabetes in rats. And all G spectrums are used as sterilization. Sure they're may be beneficial and safe uses for these technologies, however, idiots use them. And they've been handed to idiots to use, as weapons. Period.
Thank you for this operation and test. This is a modification. The second disk needs to be isolated. I don’t know if the rest of the gun is operational but it still looks cool.
8:09 exactly.. This device is a dead short... Bad, bad!!! If you need cheap directional WIFI use, a pie plate or a metal dish behind your tiny Antenna.
You unfortunately forgot the primary reason they were able to get a 5km range from the antenna; They're native Russian and their WiFi was powered by the power of Putin.
Very very clever video, from a real technician. The thing to connect all elements together shotcircuiting is a real stupid mistake from the russian guys, shows that they don't know the way a Yagi antenna works.
The wifi antenna built here does indeed significantly boost the signal, however it isn't as far as the other video claims. But yes it does create a stronger connection.
Thanks for the meters to feet conversion. I'm trying to switch to Metric... but I have 30 years experience with Standard. Standard makes sense if you're doing a great deal of fractions... however, I'll admit that(other than cooking), we don't do bother with fractions. Metric makes sense for almost everything and I wish it was taught first in school.
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.
I am trying to receive my Wifi signal from my main house to our second house on the farm. No trees and no interference to my cell phone . How do I do this ???
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?
you referred to the largest disk as a reflector and the second to largest disk as a driver. What if you isolated the reflector instead of the driver disk? And what if you did that by switching the wires going to the disks, either like either with the driver disk isolated and then again, instead, with the reflector disk isolated?
The driven can be at dc ground potential as long as its fed and matched correctly. Building this antenna is a complete waste of time, effort and metal ;)
Instead of copper disks, why not use single-sided PCB stock? Then Isolation is a simple task--just scribe a ring into the copper foil of the isolated element.
feed piont on the side it is virtcally polerized...feed piont on the bottom it is horizontel polerized.....most devices are virticaly polerized...if you cross polerize you will loose 20db of signal !!!!!!!!!
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
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?
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
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.
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.
Nylon threaded rod is not very strong. There are many better options available. www.mcmaster.com/#threaded-rods/=1cn8i6c Hopefully it is not too late for the comment to help.
Others may want to go down the path. We can offer a bit of help. Things made with 2 metals touching don't work very well outdoors. In general, dark colored plastics survive the sun better than light colored. Polycarbonate is strong but goes bad in sunlight. Acrylic does quite well in sunlight but is not strong.
There is more problem with the design. The size of the patch plate is designed to 1.1 Ghz and not for 2.4 Ghz and it need to be a dipole antena. And the directors ar the same size what is not good because there is no gain from it.
I have the exact same Wi-Fi gun except plastic shimmy on the driven element and made of aluminium so it's kind of potato it's not really good the pics up the nearest wifi only I checked with the multimeter the driven element is not in contact with the rest
Si no me confundo, la solución para que funcione correctamente es aislar cada circulo de cobre para que no estén en contacto a través vez de la varilla de metal ???
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.
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.
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...
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....😊
I'm not trying to be disrespectful, but why not test all antennas you made with Spectrum Analyzer to be sure that they run on 2.4 GHz ? It feels like an incomplete video.
prof20 int Agreed! More like use a sweeper or network analyzer. I don’t believe the dimensions are accurate. I have many 2.0-2.5ghz commercial disc rod/yagi antennas and the dimensions are much different. I don’t believe that antenna is properly tuned or optimized for 2.4ghz. A circular polarized helix antenna is much easier and woks much better. You can wind copper wire around a piece of pvc pipe and get a better antenna. Higher gain and a decent beam width. The half power points are more narrow on a properly designed helix design. A >15” long helix can get you 12dbi with 40 degree or less half power points. This disk rod yagi design will never make that spec. Unless it is swept and optimized. Still it will not result in a gain of 12dbi. 6dbi would be a stretch.
Robert Smicz please make a video
I will sure share it a round
So you're saying helix antenna most likely better than that antenna in video for 2.4 GHz? I've made the antenna above and the distance is not great, less than 1.5 KM I have tested it.
his antennas work dont care if they legal or not screw the neighbors
The best is to make an HFSS simulation and a VNA test. ideally in an RF anechoic chamber. At the 2.4 Ghz anechoic chambers are not that large to make.
he said in the video, 500 meters not kilometres .
tl error, it was 5km in english
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 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)
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.
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.
And they all build this antenna and "conclude" and "demonstrate" that it works for multiple kilometers. But it can not. Wifi protocol frame time is not waiting for more than 1.6 kilometers signal travel time. It will retransmit and then listen again, not wait enough and retransmit again.
But happy to get a tip about the driver isolation. Do not want to burn some holes in wires or parts, so the smoke comes out.
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.
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
1) Short circuit when measuring DC, not on the RF!
2) there is no current flowing through the central line when RF recieved
3) incorrect measurement, this is hightly directed antenna for the free space, not for the office.
The 5 KM figure was with line of sight and these antennas for both recieve and transmit! I know for a fact this is possible, because line of sight makes a huge difference. I say this from personal experience. With line of sight, i have managed to set up links of 10 km on just 10 mW.
So am I ready to make one like this one? Will gonna work?
Just out of interest what frequency were you using for a Ten km radio link using 10mw ?
I saw the video again that guy put directional antena on the roof of his house and u have in side of your home so may thats why he have strong signals, and the second mistake you told was right he can correct that .
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.
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.
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.
Short answer: yes
Long answer: the entire video
Yes its legit, i use a bunch of aluminum tin-can, cord, wifi extender, bolts and nuts the range is extended up to 100sq meters or more
im sorry but you need to understand that it is a directional antenna soo you don't need to base the number of wifi ssid scanned by the receiver what you need to do is to do a range test not scanning the number of ssid by itself,
It works for 4G signal. People in my country(PH) are using this in their modem.
For real?
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 ? ruclips.net/video/KIwJlbqFs0M/видео.html
Impedance is quite important. don't try antennas with bad impedance or obvious isolation. as the op mentioned if you use an amplifier it can burn. baby burn and eventually damage the receiver electronics
Hi, great video as always! Have you ever considered making an "antenna basics" showing the physical principles behind antenna design?
original video he put the antenna on his roof also its a directional antenna testing in garage is bios, should replicate the actual video to make it fair
Well now you are speaking about putting shrink wrap on the boom. Well if you go back to the video in question you will notice him cutting down a wall anchor. Which I do believe you may have missed because he did in fact isolate the boom !!!
Make the driven element a copper ring riveted on a non-conductive disc to isolate the center wire from ground. However building this design is a waste of time.
Not tried wifi gun yet, but i have built antenna and used GSM and 3g 4g frequencies and they are really good. They even catch up signals far away 30 to 40 kms away. As this design is yagi model. It may work.And i disagree from narrators some points.You say parasitic elements must be isolated, but yagi theory says that elements have a node (zero rf at centre) so it can be connected to metal boom.
But no the dipole .look for an vhf tv antenna and you will see why the dipole is isolated. Or if you love to strip LNA from parabolic dishes, you will find the small antenna in the wave guide is isolated from the chassis or metal body and has a hole to conect to the electronic board inside the LNA....
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
The thing is every wifi signal is Locked today. I don't see anyway that this would work for that reason unless you already have paid internet and you want to boost the signal.
What? Singlal masurement with percentage (%) scale ??? RIP wireless world :(
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.
Is this good for home defense just in case they ban firearms in America
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.
the 5km claim was with 2 wifi guns, one on either end
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
I made similar antena and connect it to router with original three antennas. I disconnected one original antenna and connected this wifi gun antenna. There was no difference in signal range. So not working.
"I'm now going to show you the problem with..."
I WISH YOU WOULD!
7:33
Solution starts from 7:51
What phantom said...same reason long long extension 120amp cord developes resistance and creates heat/fail
ET wants his gun back.
I have a question if i can use PCB boards to build the antenna
Andrew McNeil. Every wifi signal is Locked today. I don't see anyway that this would work to get free internet unless you already have paid internet and you want to boost the signal with your wifi antenna.
2.4GHz is microwave oven frequency. Don't amplify it.It will harm people
What about 5g?
@@bansheemania1692 If it use approx 800MHz . (Harmonic frequency) The same effect of dielectric water resonance as 2.4GHz . I **believe** that it is the root of most cancers in the present day. However in the past, "The continuous of pulse" is too low (only "sound data" transfer for 2G ) In the present 3G-4G "the continue of pulse" for computer data is too high (ex. wifi 11Mb/sec) and this also has more affect to the "resonance" more than "intensity" of beams.(However "the intensity" for "resonance affect" must atleast beyond in some level see mathematical about Orders&Series then multiply by time)
@@bansheemania1692 It can cause no harm with Li-fi that use Lights or Infrared(GHz) instead of Microwave water resonance 800,2400MHz)
PS.Except sending the red Light (Д=700M or F= 4.3x 10^17Hz) (c=FД ) in resonance frequency like 800Mbps or 2.4Gbps or harmonic still harmful
@@bansheemania1692 5G is a military weapon.. Plain and simple. It's the exact same technology used at the airport with those full body scanners. It's harmful. As is 4G 3G and the rest. You usually don't see the damage for 10-15 ish years.
LED lighting is another creepy weapon that can pick up crystal clear audio ruclips.net/video/hliHBeC1sco/видео.html
Any claim that 5G (or any G of internet thus far) is not harmful or that it's not tested, is BS. The damage these things cause has been known for decades. The frequencies used with 5G are the same frequencies used to induce diabetes in rats. And all G spectrums are used as sterilization.
Sure they're may be beneficial and safe uses for these technologies, however, idiots use them. And they've been handed to idiots to use, as weapons. Period.
Good video Sir.Andrew. i'm excited to see you bulid your own version and design of this type of antenna
I was sure this antenna wouldn't work properly without insulating the active element . Also5 kilometers was a bit outrages for its range .
No cause he had one pointing back at the antenna that's how his distance went longer he said.
Thank you for this operation and test. This is a modification. The second disk needs to be isolated. I don’t know if the rest of the gun is operational but it still looks cool.
NOPE
8:09 exactly.. This device is a dead short... Bad, bad!!!
If you need cheap directional WIFI use, a pie plate or a metal dish behind your tiny Antenna.
Wouldn't a parabolic dish the same diameter as the largest disk collect just as much energy as this antenna?
You unfortunately forgot the primary reason they were able to get a 5km range from the antenna; They're native Russian and their WiFi was powered by the power of Putin.
so simple. its work or not???
Very very clever video, from a real technician. The thing to connect all elements together shotcircuiting is a real stupid mistake from the russian guys, shows that they don't know the way a Yagi antenna works.
Thank you for sharing your knowledge and for the experiments!
great video, as is the reference video it discusses, and the comments below; They all show what a complex field this really is!
So it took more than 13 minutes to say the antenna doesn't work. Thanks for that.
Short answer to title of the video: NO.
ricande this post needs more upvotes
Thx for simlifying this boring video !
Yes it does work! Watch the entire video!
radmation how ?
The wifi antenna built here does indeed significantly boost the signal, however it isn't as far as the other video claims. But yes it does create a stronger connection.
Why don’t they teach this in schools oh that’s right gender studies is more important
Thanks for the meters to feet conversion. I'm trying to switch to Metric... but I have 30 years experience with Standard. Standard makes sense if you're doing a great deal of fractions... however, I'll admit that(other than cooking), we don't do bother with fractions. Metric makes sense for almost everything and I wish it was taught first in school.
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
Can I boost my wifi signal with this? Please show how
A good yagi can get 18db of gain, which should be plenty to shoot a few kilometers.
A good Yagi would under the right conditions
You are missing that they were using 2 wifi guns to connect to each other in the original video.
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.
I am trying to receive my Wifi signal from my main house to our second house on the farm. No trees and no interference to my cell phone . How do I do this ???
me wondering how the hell that antenna increases the directivity.
i've done 5km during winter. so dont know what this guy is talking about. done more then 5km as well but at 15-20% range at 10km
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?
you referred to the largest disk as a reflector and the second to largest disk as a driver. What if you isolated the reflector instead of the driver disk? And what if you did that by switching the wires going to the disks, either like either with the driver disk isolated and then again, instead, with the reflector disk isolated?
To my knowledge all elements of yagi antenna must be isolated from anything.
Bad knowledgement..
In the original video they had 2 antennas pointing at each other would that increase the range?
What exactly did he do to isolate the main driven element? It's the entire disc isolated from everything, or...???
The driven can be at dc ground potential as long as its fed and matched correctly. Building this antenna is a complete waste of time, effort and metal ;)
I didn't see any change that was made to the antenna.
I have one question: do you agree with the way the russian guy did, to gove wifi to the mobile phone by doing a simple spiral?
simple answer, no
what would be the best option to give wifi to mobile phones? connect the antenna to a router?
Hello.
I want to know how many millimeters is the thickness of that copper?
I need to know
Instead of copper disks, why not use single-sided PCB stock? Then Isolation is a simple task--just scribe a ring into the copper foil of the isolated element.
feed piont on the side it is virtcally polerized...feed piont on the bottom it is horizontel polerized.....most devices are virticaly polerized...if you cross polerize you will loose 20db of signal !!!!!!!!!
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
How would using an insulated boom such as a wooden dowel affect the antenna?
You made a big mistake... the gentleman clearly says - 500m not 5km. @3:53
Thanks for testing that for us, good video.
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
How do you "isolate" the drive element? If we knew we would not need to see this video - we would be as much expert as you.
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?
I like your magnetic wall mount tool holders
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
hello sir i make it and text it to a router about 350 meters away from my home thanks for good post sir
Remember the Ukrainian guys used the same type of antenna in both receiving and sending ends
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.
Can you please share your isolated version antenna picture with me.
i think he's dumb the video is pointless nothing added
На какую частоту?
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!
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.
I would use nylon nuts and threaded rod.
Nylon threaded rod is not very strong.
There are many better options available.
www.mcmaster.com/#threaded-rods/=1cn8i6c
Hopefully it is not too late for the comment to help.
Ken Smith the reason I said nylon, was that it was the first non conductive threaded rod type I could think of.
Others may want to go down the path. We can offer a bit of help.
Things made with 2 metals touching don't work very well outdoors.
In general, dark colored plastics survive the sun better than light colored.
Polycarbonate is strong but goes bad in sunlight.
Acrylic does quite well in sunlight but is not strong.
Why go through all that you can get wireless backhauls for under 100.00 that can reach out to 22km.
Network Services:
For some it is a hobby.
For some it is a lack of money.
For some they want to know how it works.
The two soldered discs look to be un isolated from each other
Would this concept work for cell phone signal? Here I get 1800MHz and I´m tryng to get signal here in a rural area
There is more problem with the design. The size of the patch plate is designed to 1.1 Ghz and not for 2.4 Ghz and it need to be a dipole antena. And the directors ar the same size what is not good because there is no gain from it.
Грубо для ориентира www.radiouniverse.ru/sites/default/files/pictures/book/page/729/459-1c2011_0637._203e4245303c3c353b4c_1a._103d42353d3d4b-145.png
1) λ = с/ν
2) λ/2
3) λ/4
I have the exact same Wi-Fi gun except plastic shimmy on the driven element and made of aluminium so it's kind of potato it's not really good the pics up the nearest wifi only I checked with the multimeter the driven element is not in contact with the rest
Andrew mcneil he mentioned distance between plates must be 20 cm but your design is not like that distance between disks not 30cm
Si no me confundo, la solución para que funcione correctamente es aislar cada circulo de cobre para que no estén en contacto a través vez de la varilla de metal ???