My New Favourite Antenna
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- čas přidán 20. 08. 2024
- In this video we take a look at the Yagi panel antenna from a previous video. I have to say I am impressed with this antennas performance. And yes I also want to develop this for 5GHz and 5.8GHz. I am unsure about the gain of this antenna but it does seem to perform the same as a double biquad around 11dB (with two directors).
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This special kind of 'Yagi' is driven across two elements. It's behaviour will be best explained as a hybrid of the HB9CV (driven over two electrical connected elements) and a log-per-antenna (with elements continuously decreasing in size. As the driven element is not only a dipole in front of the reflector, this is not simply a yagi uda. It's a bit more complex. Even more complex is the question, how this antanna's polarisation would be. Probably circular. You won't find out about the gain without precise measurement. But as long as it performs fine... Don't worry.
I manage to measure the shapes in the original pdf file. Please note that measurement are in mm and needs to be roundup or down. drive.google.com/open?id=18zO9kqMy-fM6rCkbbpk4ClFFSJZe7IGx . Enjoy and share your results after build.
Thank you Andrew!
I just suggested your videos to my brother,
He is an electronic engineer like me and we have a lot to learn from you :-)
Your speech and clarity of exposure are a rare talent.
Thank you again!
Thank you cxlabs
eh eh, I am trying to demonstrate my Boss that BlueTooth Low energy distance meter RSSI based simply don't work!
I keep learning from you Art and keep testing my poor biquads,
g'night!
Generally speaking, if the resonant frequency is lower than expected, the driven element is too long (big). I'd try carefully trimming the driven element to get the center frequency a bit higher. Looks like I have a new project to try. Thanks!
This looks more indicative of a Log Periodic antenna with its decreasing element sizes. Either way, yagi or log periodic, very impressive! I actually had high hopes for your yagi biquad, which is by far my favorite looking antenna.
On the pdf, please add a reference on the size/scale so we know, once printed, the size is ok (before all the cutting work)
Yes, clear size information would be very appreciated.
I manage to measure the shapes in the original pdf file. Please note that measurement are in mm and needs to be roundup or down. drive.google.com/open?id=18zO9kqMy-fM6rCkbbpk4ClFFSJZe7IGx . Enjoy and share your results after build.
@John Downes
Hi John, thanks for the efforts but your measurements are slightly off. Could you do another edit round and update them? I bought the antenna on ebay (www.ebay.de/itm/2-4G-14dBi-150M-Long-Distance-USB-2-0-Wasserdicht-CMCC-Kabellos-Wifi-LAN-Adapter/163568415485?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649) took it apart and measured it with a digital caliper.
Here are the results (in mm) compared to your (John) drawing:
Circle = 52.18mm
Original reflector = 78.09 x 95.22
corners = 4.4 x 10.1
hole = 26 from short & 39 from long
Driven element
51.5mm (John) = 51.6mm (measured)
13.5 = 13.6
8 = 8
4.91 = 5.2
9.5 = 9.6
4.50 = 5.2
corners = 3.8 x 3.8
13.49 = 14.3
hole = ok
Spacing is 5mm in both cases
This results with me in a center frequency of 2452 MHz (Channel 11) and an SWR of 1.411. Increasing or decreasing the spacing makes things worse and adding one or more elements, drops the SWR to 2.095 and worse and makes the thing unusable.
Ok guys, I hope this helps some of you.
I checked and even the original measurements from the chinese antenna are slightly off. The new improved version with measurements drive.google.com/file/d/1YUtCtA57I8AyKA4WGt4QRwAIShzAoUJn/view?usp=sharing . This is not my work i just share. Thanks
@@johndownes9969 thanks, after a few weeks research this design rocks and this will be my first attempt at making a directional antenna
Build it and put it in a 120 mm drain pipe end put aluminium around the Outer wall. It became my best directional antenna. Worked great to use the public network at the campsite. ;-) Thanks.
Nice, definitly my next weekend project. Thank you.
Nice build! I love this little project you have here! However, per ARRL, Yagi forward directors should be about 5% smaller for each element you add. Yours are much more than 5%. I need to build one of these and see how I can do. Might make mine from blank PCB.
Yes, 5.8 GHz for FPV, go Andrew make it happen!
I hope you can get around to making the insulated versus conductive Yagi boom video you mentioned. I'd like to see a definitive answer.
4G/LTE dimensions, or maybe a calculator? Thanks!
Any improvements on this antenna? I see you had many thoughts at the end. Do you think increasing reflector will increase the gain even more?
Love your videos by the way.
Awesome! Found the PDF in the description.
Thank you!
HEY andrew do most of your designs also work with 4g LTE
Should try attaching this one to a satellite dish.
Andrew before 4 Years you criticize this Russian yagi antenna and you said its wrong idea to make it with connected ( not isolated elements) and I remember the title of your video : is the wifi gun really work ?! And today you are making it ?!!!! By the same measures the same design?!!! Any way thanks for russian old antenna design....
Same thought
Why yagi? This is Bester (BDM-1). Autor antennas: Igor Panchenko . www.lan23.ru/wifi/BesterOffset/BesterOffset.html ; www.wifi-antennas.com/topic/11-bester-antenna/ . As for Andrew in his works he overstates the gain of the antennas. Long range biquad yagi there are no 21 bdm. His work is just a beautiful design.
*21 bdi gain
I truly enjoy your very informative video's. I have a simple question: would I be able to use this type of antenna to reach a distant hot spot such as in an RV resort for catching their wifi to watch TV? NETFLIX etc. ? Or is this only good for computers?
Thanks for the great videos.
Thanks for fixing the link for the template. 🙂 I have watched nearly all of your videos, and am about ready to start experimenting.
I sometimes work with a fifth grade science class. I plan on using some of your designs in their science class.
I see you're using a metal threaded bar. Doesn't the driven element need to be isolated like the problem you found on the wifi gun?
I stick to horn antennas, easy to build, gain from 8dbi to 20dbi, broadband, extremely cheap, I dont use connector on antenna, cable crimped to can. Even low gain horns perform very well, wide pattern. I have used 75ohm CATV quality cable with low loss and "F" type connector and homemade adapter to RS-SMA.
Make PDF on that! Or video
Will this rival Biquad Yagi Antenna? I love your designs. Gonna make Biquad Yagi for my camper.
Today made the design according to the pdf without measurements and the best swr is above 2.7GHz. I also could not tune it down. Next step is to order the original antenna from ebay and take the measurements myself. So far im rather unimpressed with this one.
Very interesting Andrew, how about a PDF template for 5.7 GHZ with dimensions for Amateur TV use.
Or even 5.8 GHZ for fpv?
thanks for the template!!
I kn about antennae but I'd imagine conductivity, or not, between elements is important? This design has insulated spacers separating the elements but all joined by a common threaded conductive rod - so how do you know if your elements are insulated or shorted? The discs may touch the thread but the contact may be so poor it is high resistance, or it may be zero resistance. Surely you have to remove that variable, by using non conductive rod or stepped insulating spacers for example, before you can tune your antenna?
Take a look at the Mayan hunab ku symbol for the universe.
It reminds me of your antennas.
I can confirm .. this antenna pretty good .. got it on a alpha
Hi Andrew im very impressed by your antenna videos very to to'he point and accurate. thank you for showing the how to parts of the antennas. i did a download of your new Favourite antenna but it looks way to small with a 5.6 cm reflector and 3.6 driven element .? also wanted to ask you about the ALFA cards as to which one you like the best. the AWUSO36NH ?. Keep up the amazing work you do. thank you from Bakersfield Calif.
looking at your antenna, I believe the spacing of the directors is too close after the first director. Try having them the same size but after the first director, double the spacing and see how that goes
😀
Now I want to make 2 of these and geek out seeing how far I can pump a 2.4Ghz wifi signal with 2 cheap routers...
I have zero use for such a setup, it just seems like it might be nerdtastic fun.
Andrew, any thoughs on how to tune this exactly; where and how to cut? My first idea was to play with the spacing of the reflectors...
Andrew your reviews are great, is there any rank of all the antennas you have tried? Would this one be better than your cantenna?
Hi Andrew. thank you for great video. can you measure performance between 1 elements or 5 elements? (sadly i have no spectrum analyzer and no chance to find) also can i use this template with pcb copper plate? they are cheap and easly work with them but i dont know is thickness changing something? kind regards
Very nice one!
I guess the obvious question is: how does it perform in a can? =))
I'll keep a close eye on this one, because I have 2 locations where I will need a directional wifi antenna, one due to distance, the other one due to hostile environment: 2 neighbours competing signals by boosting their router output power instead of just agreeing on using different frequencies are blowing away my mum's out-of-the-box wifi router signal. Can't get a decent stable reception 7 meters away, *in the same room*! Shift one floor up or down and forget about it... (and to know that the one causing the escallation, two houses down the road, only uses it to connect his printer that sits on the same desk as his computer...)
Can you do a video on working angles of this antenna?
Thanks!
Hi Andrew,
I would love the dimensions for 4G antenna, particularly for the 1800 Mhz frequency (with the maximum response from 1700 MHz to 1900 MHz). Thank you in advance!
Hey andrew, great video. looks like simple enough to built. can you suggest a calculator or a program to adopt this to other LTE frequencies like B5, B8, B40. Thank you.
Hi Andrew' can you give me a yagi calculator, i want to create my LTE antenna 1800mhz to 2300mhz. Thank you.
maby try some lager spaces between the non driven elemants , increase the lengt of the antena ,
I'm guessing the .pdf files is indicative of a sheet of A4 paper, yes? If so, then, the shapes should be accurate. Hey, would I be correct in thinking I could try something like this for 2.4 GHz, just change the sizes?
Andrew,
When you add directors, particularly if closely spaced, you alter the swr, often to such an extent that the gain is no better than a dipole and reflector. How can you adjust your dipole to cope with this?
You mean even the driven element is not isolated, and it still works.?
Thank you for using your skill for free gain instead of purely personal gain. What are the true dangers of these frequencies? I do not doubt you are aware of why I ask.
Hi, can you also try and make this antenna for 1.8GHz? Thanks.
Hello Andrew. Did you get around to adjusting the dimensions to get the optimum response? If so, I hope we get an update. Thanks!
Now that is a real mans antenna!!!
Its true what they say then its not the size that counts lol
good stuff!
I've read that if is isolated it is more dangerous for electronics because of atmosphere electricity. Is that true and how much more it is risky?
I may not have constructed this correctly because the dual biquad I made following your instructions is at least twice as powerful. I heard on your video that the spacing is 5mm. Is this correct?
would these work well for indoors? going through walls for extenders?
Any Chance of a MIMO type antenna, perhaps using lobed shaped elements for vertical & horizontal polarized signals?
Would it be possible to make a similar antenna for the 5Ghz band?
Probably this is an stupid question (I do not know anything about atennas) but: in a normal sunny day, in a city, in which distance range could I expect to get a over 50% signal? Thanks. I ask the question in this way because since I do not know anything about antennas I do not understand the parameters which define the antena capabilities.
I didn't think you can get a signal through Steel
I tried this antenna, it doesn’t work, i even tried to have 2nd rectangular disk de-shorted ( meaning that is not part of the circuit. It sits on rubber and no electricity passes by if you check it by Voltmeter ), i tried making everything 1.8x bigger, still doesn’t work. I use 75ohm cable. Any reccomendations @andrew mcneil
What is the max gain of this antenna ??? Nice small size fella.
Does the distance between the elements of the antenna relate to the distance of the frequency wavelengths?
im confused, the driven element is shorted (thru the bolt) to the ground plane!? Why? And the other elements too? isnt that just a small loop?
Did you just slider the main wire? What about the braided or other wire, just free floats?
Can you compare this one to a double biquad antenna, which is better?
And can you give dimentions for 1.2-1.3ghz?
Thanks
Hi Andrew, with simple things you make great results! I want to ask you: I have three bluetooth rtx (one is tx and two are rx) I use them to transmit Hi-Fi at 60mt. Originally the devices had small external antennas, (effective working radius 30 meters), subsequently I modified by installing three antennas (one on each device) always vertical type but more performing. I don't have the best tools as you have them but I noticed an effective increase in the working area, 60 meters. Now I would like to put / try three directional antennas (not much ..). My arrangement of the two Bluetooth rxs are 30 degrees open compared to the tx. Let me explain: I have a mixer console and I connected the Bluetooth tx, then I have two speakers (right and left ch) arranged 50 meters from the tx and about 25 meters away from each other. So: on the tx an antenna with a narrow irradiation lobe while on the two rx an antenna with a narrow irradiation lobe. can you show me your works where to look? Thanks!
link Bulutooth: it.aliexpress.com/item/4000308521905.html?spm=a2g0o.productlist.0.0.6e967dd8FeV5O3&algo_pvid=f1ac4452-096a-46f6-97bf-891c2d89f2fb&algo_expid=f1ac4452-096a-46f6-97bf-891c2d89f2fb-58&btsid=0ab6f83915859938512773527e5264&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
The previous model had only one antenna...
People who do this kind of thing with Bluetooth tend to use a biquad antenna. The trouble with Bluetooth is you have so little power to work with a single biquad is an easy directional antenna to build with simple tools. The good thing about the biquad is that it is directional but it has a wide beamwidth, think of it as a torch compared to a downlight. Don’t bother with a double biquad though as you would not really see a difference with Bluetooth because of the low power you have to work with.
@@andrewmcneil Thanks Andew! I orient myself on this antenna ..
czcams.com/video/4t6OliwhJ5g/video.html
Is this your argument good for me?
czcams.com/video/0G579LZQaxM/video.html
maybe this better ... :-)
@@carlocastelli7511 Yep building it into a tin like that would be much nicer than a PCB board if it is on show next to your setup.
good vid ty
Could you use stainless steel, or pcb board? I can get stainless laser cut at work.
Can anyone send me the link to those sma connectors?
www.ebay.co.uk/itm/5pcs-SMA-Male-Plug-RF-Coaxial-Connector-Crimp-For-RG58-RG142-RG400-LMR195-O-P/233744581602?_trkparms=ispr%3D1&hash=item366c4343e2:g:KPwAAOSwkvxdAHE~&amdata=enc%3AAQAFAAACcBaobrjLl8XobRIiIML1V4Imu%252Fn%252BzU5L90Z278x5ickkai8xCwosGKpC0NWj85e%252FB8ycp62%252FZt25hPRUgmYYQ%252FoajbAwnoosIVBnKSvxLNA2SInfm404NgIE4VMvdGO4%252F2xb6XW5rl0sRhDKKezWqGjIGdUZhm7diwWJA7lbKy6vf9R5%252BB25giBYneJHUnJQGBrRJS%252Fl9hCG3dpUNa1xSnr%252BJIliK2UwjCziv6F5HtwktX5EfMHqoxFl29AjivK3reIH6uUBnVPCS%252B4%252FGTUp0dNXeK8zQax5HjAmMTRQLe9jWTBTLO7ntEeILN0NbzzbYj3IcQOopNp5Tsmu7ZZ9hPIb%252FGWTW60XBwaI5IMrYZax5Y072Y%252FBWw%252FOF2uycChmqoApBEuis5tzuXaqTQVDcBaJpfY8cYDKfRx1E6eM2pLjEe3Su0dFIeZ%252FNGde7a9WFSDkeI34C6Ey9vVSJ%252BA08bas5t1P3hYUWYo9SDXv6pUNJbsB1IX1wYPYgG7qMOHepz79bzre0E6O19dV5tGV7WSc4WQieeU8nxNtYuqLkqJcm8%252BNMyWEoKWMwLj5WbCUyZAfEvw7kmbOaZdNAv8uxL3aO%252FaDhznZyWUDn6Ttz4m%252FHnFY%252BrpDiPFi0Mmfk0X4Fww1dQNk4dXpeOBct6A0HjEAPO4Yqd0isZ6C5Mk59Yv%252Bq1MHx51yrOAmFXJ1WQAelm6Ie6Svcc%252BPI%252B0%252FRiSVAGAgJcp7Dm3%252BW3pV42Y1%252FRCstly5l%252BsaT4uvUiPJUU6EeBbSnCxNBvjNL7XmFHhhS8FU%252FF5baOXOVTk5y7L%252FbyG5BIPS%252FvtDcAHUF9BLji3dbA%253D%253D%7Ccksum%3A2337445816026717452c68164579a05bd9f2346fae2e%7Campid%3APL_CLK%7Cclp%3A2334524
@@andrewmcneil thanks!
PLEASE MAKE insulated version with comparison please
I will as your not the first to ask
Why though? You can buy, brand new, a 30dBi 5GHz dual feed dish for $109. Google RD-5G30-LW
Look at his channel
Is it impolite to inquire about the commercial version of this design?
I need something affordable or diy antenna 600 yard/500 meter, some trees. Would this work? From my home wifi to a building down the street.
This antenna works on 5GHZ, but can you re design it to proper 5GHZ optimization?
Does this work through a glass like window or sliding glass door? Or does it need a clear line of site?
what is the network analyser? A osciloscope ? How did you measure it?
did you ever get around to making a 5.8ghz version.
Please, plans and materials. Thank you.
Please make video about LTE 4g antenna :)
I plan to make a biquad for LTE it is on the list.
@@andrewmcneil looking forward to see it. cheers mate
I missed the part where the driven element was isolated from the boom.
it wasnt .. he said it dont matter
How to isolate please reply i really need it
ممكن مساعدة ماهو افضل شكل هندسية التقاط النت على تردد 1800mz 4gارجو الرد
Can this antenna use for receiver mobile signal? 4G or 3G? Sorry for the stupid question.
Would the thickness of the copper sheet matter?
could this type of antenna also be adapted to 433 MHz for example ?
Hello, do you plan to sell this antenna on ebay ?
About how much total copper is used for this project?
thinner element material maybe??
do you have a video out about the 5ghz antenna like this
Can you possibly give the eBay link to these antennas?
What is CRSR?? I think it is S11 ratio....
Any alternative for copper? And the spaces
please whats your faorite 2.4 ghz antena Andrew.
have you got the dimensions for the panel yagi antennas for 2.4 Ghz?
Can I use these antenna's for my wifi external antenna??
The ground and positive are connected or not?
Hi please calculate for 3700mhz LTE b42-b43. Sorry my bad english
How much thickness the copper plate
What is the distance of the spacer
Can you use this as a 4G antenna
any development on the 5.8?
How far can this antenna transmit?
What was the range on that antenna?
how about to cut hard drive disks, would it be good?
. done on a lathe
hard drive disks have some odd coatings, I'd be wary of that. ie, breathing the dust.
Shouldn't those parasitic elements be further spaced than 5mm?
They are spaced at constructive points at the operating frequency and there are many constructive points along the wavelength
@@andrewmcneil Could washers of the same diameter and thickness be used?
@@eliasjoserodriguez5160 If you can find them yes
Hi
What is the polarization?