A Bespoke Yagi with a modular design

[@stevemacbr]

Great idea. - A rubber band wrapped around each successive driven pair would secure them together, and give a 'pressured' connection.

[@dasgettopikachu7878]

The most practical design would probably be a yagi that you can extend like these telescope antennas on the typical transistor radios.

[@pasixty6510]

I'm really looking forward to see what the measurements on an analyzer would be like. The shorted coax seems to be acting more like a stub (impedance matching element) than a balun. But apparently it doesn’t bring the impedance to 50 Ohms. I dare to predict that the impedance of the 3element antenna is significantly higher than 50 Ohms. The additional second pair of directors (6th and 7th element) seem to bring down impedance to something near 50 Ohms. That would (better than only 'gain') explain the sudden increase of performance when using 7 elements.

[@czarzenana5125]

It's very nice, but a lot of work. I still praise you for the bi-quads. I have built quite some antenna's now and my conclusion is that the bi-quad based antennas are always the easiest to build and give the best performance for the money. It might turn out to be different for point-to-point connections, but for those you'll need have access to both ends of the communication. I can only reflect on my own experience in an area with loads of disturbing signals around. I picked up 88 access-points yesterday and that's with a bi-quad in a 27 cm can with a very short cable, so I was only able to turn it around for about 180 degrees (having a wall in the way). In this flat with 96 apartments and having all antennas on the roof of all mayor 3G and 4G providers in the country, being surrounded by many other houses, my situation might be totally different from others. I would like you to make a video about the possibilities on camp-sites and for openly available Wifi-networks. There are a lot of problems with them, legally as well as concerning security and being unable to connect because of certificates that need a correct time which is not available because of most routers and repeaters getting their time from an NTP-server from the internet. About 99% of them doesn't have a battery back-upped RTC.

[@DavidLopez-bz4rj]

Waveguide+horn antenna. Nearly any gain can be achieved and construction is supereasy.

[@czarzenana5125]

@@DavidLopez-bz4rj Gain of an antenna is a bit silly, isn't it? You cannot get more energy out then you put into it. An antenna is passive. Your only option is to make it more directional. If you don't have access to both ends of the communication having a very directional antenna on one side often is a disadvantage.

[@yv6eda]

Amazing antenna!

[@TheGhungFu]

Nice. Maybe I'll try this with copper tubing. Thanks!

[@stevemacbr]

@andrew mcneil - Is there any way of COMBINING (or configuring) a similar small yagi, to make a 'direction finder', for mobile phone CELL-TOWERS. ??? - I live in a an area of bad reception,... and the 'service provider' appears to RENT/LEASE (time) on several towers around me,... rather than own their own as a FIXED transceiver(repeater). .

[@ThexZEDx]

@ Andrew McNeil absolutely brilliant channel mate, found it by mistake!😉. but since have made many of your designs and love them perfect!! Now I just need one tiny little bit of help which is,.. is there any way of connecting these aerials to a smartphone like the oneplus one to boost the signal?. Which I use as a Wi-Fi repeater. It's a spare phone so I don't mind Frankenstein in it 😀😁😜. Or maybe u can do a video on that, that would be a great idea.😄 Any help will be greatly appreciated.

[@czarzenana5125]

You can open your smartphone and search for the antenna. Those are always easily recognized. Connect your antenna parallel to it, drill a hole for the cable and ready to go.

[@ThexZEDx]

@@czarzenana5125 I will deffo try

[@ricvis44]

Great video! I wonder how an antenna shaped like a Yamato cage would work? Round elements instead of straight?

[@andrewmcneil]

I have a few designs for a circular polarized Yagi that have round elements but not got round to making one yet

[@ricvis44]

I’d be really interested to see how a circular polarized Yagi would perform!!!

[@opk157]

I wonder if we will ever see this on a Network analyser (I'm curious about the swr), as I noticed that promises made in these videos, rarely become reality. Fingers crossed 😁

[@DavidLopez-bz4rj]

I think we would be very dissapointed with the results. At this frequencies yagis are extreme sensitive to building errors, tenths of mm can affect the performance, isolators, boom diameter, baluns,... Yagis are for UHF or lower frequencies, they can be build, but not without measurements equipment.

[@mutalibgozalov7208]

Does the diameters of elements should be as same as in video or we can use just copper wire instead of tubes?

[@TBMartin]

What I would like to know is would it be over the top to have 4 wifi cantenna Long range antennas connected to a Alfa Network AWUS1900?

[@andrewmcneil]

You would need a amplifier (or two) :-)

[@TBMartin]

@@andrewmcneil If only you sold/made one lol I could see me spending at least £200 on that setup.

[@czarzenana5125]

@@andrewmcneil Be honest. Do you think a cantenna is a great design? Or are there better alternatives?

[@JuanFlores-yy8ru]

Hello Andrew, do you know if this antennas that you make... are compatible with other divices, diferent to alfa card, for example tp-link card?

[@andrewmcneil]

If it has a SMA connector then yes

[@aurthorthing7403]

N-O-D-E made one of these a few months ago.

[@81pieda]

Yes, you can solder aluminum

[@czarzenana5125]

Tell me how to do it at a hobby-level, please. Ik kan het ook in het Nederlands vragen.

[@reinholdu9909]

@@czarzenana5125 www.wikihow.com/Solder-Aluminum ...a bit tedious but works!

[@gordon8065]

general question If the 2.4 MHz receivers are inconsistent are the transmitters ?

[@alanstedman6716]

Id buy one if you were to make a batch :D

[@Simon-lj8bb]

Would it be possible to have good measurements for 2.045 ghz for the same design?

[@bis124]

Hi what's the name of the Facebook group please

[@w2n-farm]

Mr. Andrew how to make 1800mhz or 2100mhz cantenna? Please help me to make it.

[@zpawn1]

maybe this calculator can be useful www.wikarekare.org/Antenna/WaveguideCan.html

[@czarzenana5125]

I had this calculator: www.changpuak.ch/electronics/cantenna.php?fb_comment_id=10150238653304398_20258357 I wouldn't recommend a cantenna. Based on my own experience, I would go for a bi-quad. You can put it in a long can to make it more directional. My first tests were great, but I still have to do the tests outside in the open.

[@Andre-PY4DR]

Andrew do you know of any good seller that has original Alfa cards available? Tnks

[@cfisherau]

RFshop in Adelaide (South Australia) rfshop.com.au

[@ivaylonachev3692]

18:26 what software do you use

[@ThexZEDx]

It's called "Vistumbler" mate

[@mudasirahmed1385]

Can we make 34dbi yagi antenna

[@andrewmcneil]

Never tried Mudasir but I am building a new Yagi prototype rig so should be easy to test

[@mudasirahmed1385]

Thanks for your response, Hope you will try to implement this also.

[@czarzenana5125]

My guess would be it's quite impossible to make one DIY. You'll have to be extremely accurate.

[@DavidLopez-bz4rj]

It cant be done, it would be long as hell, and errors would add up as you were doubling its size and the resonance of elements. Theoretically it would be 16 meters long. This gain can be achieved with a parabolic antenna with 6 meters or more of diameter, I havent calculated the exact size.

[@reinholdu9909]

@@andrewmcneil Please Andrew ...I'll leave a subscription just to see that happen😎 Good work btw 👍

[@DavidLopez-bz4rj]

Why would someone build a yagi for these frequencies? There are better antenna designs that are more permissive and dont need balun or impedance matching at all.

[@andrevandermescht2370]

Coot? It is Cut. Not Coot.