Fascinating stuff! Would be interesting to see what difference would be made by adding the other two sides to make a box. Thanks for making these videos.
Time for a hike to demo it?... :) They always say RF is a dark art and it's things like this that prove it. Be interesting to see if anyone has an answer.
Would be interesting to see your comparison to the Kathrein antenna, the other way around. Meaning a sector antenna with biquad elements. I guess it should be able to get pretty defined beams for a very directional application, which would of course not be very useful for covering a lot of cellphones but I think it is an interesting thought.
My guess would be, that the wings make the beam a bit narrower, so the beam fits a little bit better into the parabolic reflector and less radiation passes it by. More energy hitting the reflector equals the amount of more driving energy times the expected gain caused by the reflector. There you are.
I was going to try your favourite 2.4ghz 3 element yagi as a feed but seeing this I may try a biquad first. If you've still got that 5ghz wifi cantenna laying around that may fit in the LNB bracket too.
Looking forward to the LTE band 3 or LTE patch panel cellular router antenna. Many cheap single PCB antennas there. Expensive without justified results. You can save 100s /1000s dollars of viewers with your expertise. Could you please suggest any schematic diagram?
yes cellular is most important than wifi range because many of us have no access to fiber line and making antenna will be great to save money and with great tested result🤔👌👍
Amazing videos! First channel where I can easily understand concept/build. I assume increasing length of wings would make the F2B ratio better, would it improve the range? Would be interesting to experiment with angle and length and see if there is correlation between surface area of wings (4 sides vs 2) and range/signal.
It seems to me that if a curved back as you have also made before but all 4 sides at a 45° angle like simulating a parabolic dish would also improve signal reflections ? Or is that not how these things work.. ¿
If I had to guess, maybe those wings are acting as some kind of half wavelength waveguide? Since they are so close to the edges of the biquad, which is about a half wave in horizontal length in this set up, the gap to allow in horizontal waves in is fairly resonant. It may at least explain the lack of wideband response normally seen in biquaud antennas. Do single-quad antennas also have a natural impedance close to 50ohm? I'm not sure but would love to see a MIMO version of this either way, since long range WIFI benefits from it hugely in speed and reliability, and a parabolic reflector setup is exactly when it should be leveraged most. I wondered if the wings were thinning the beamwidth of the antenna, but I think you're correct in saying they don't effect it, as they would likely need to be considerably longer to cut off part of the reflector's gain. Great video Andrew.
It's important to use as much of the surface area of the reflector as possible, and that means having a wide beamwidth on the antenna you have at the feed. Cantennas normally have a very narrow beamwidth, but it can be expanded significantly by shortening the can and adding a horn. Andrew actually has an older video on this channel of just that.
Hi Mr. Andrew Do you think that if you use WiFi Gun as a feed for dish, it will not have a longer range than the Biquad Antenna ? Because the Yagi Disk Antenna alone has a good gain and range, in your opinion it is not more suitable for the dish than the Biquad due to its round and disc design and it receives the most waves at the focus point of the dish. Please make a video and use the Yagi Disk Antenna as a feed for dish, thank you.
Has anyone tried to build a router into a large LNB so you can have the signal on 5GHZ in either Horizontal or Vertical polarization or for that matter take a VIASAT two way transceiver module and associated dish and move the TX/RX frequency to 5.0-7.0Ghz
Most of your biquads have the driven element connected with an exposed center conductor. Now its isolated by the tube like MartyBugs used to do it. Could this make the difference? Is that exposed center conductor acting like a balun?
This is connected to coax directly so I use a tube to add stability. When using a N type or SMA there is no need for a tube. The tube length has no effect on the antenna.
@@andrewmcneil Hello Andrew! Thank you so much for making these videos. Should the biquad elements be convex-ated to conform to reflector and maintain 15mm optimum distance? i.e. higher tips/points...
Trust me, don't. They are a pain in the ass to make, and can be bought on Ebay for next to nothing. Strapping a low-gain MIMO antenna to the feed point will be more than significant and will give you wideband capabilities, just replace the crap coax that comes attached to it. Way less work for better results. Hope this helps.
Yes! However it's important to use as much of the surface area of the reflector as possible, and that means having a wide beamwidth on the antenna you have at the feed. Cantennas normally have a very narrow beamwidth, but it can be expanded significantly by shortening the can and adding a horn. Andrew actually has an older video on this channel of just that.
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Fascinating stuff! Would be interesting to see what difference would be made by adding the other two sides to make a box. Thanks for making these videos.
Would be interesting to see what you would get in a "box", like you said in the video... maybe a narrower signal...
Единственный наверное человек на ю-тубе,который экспериментирует с антеннами вай фай диапазона.👍👍👍
Looks like it changes directional polarity with the perpendicular wings. The polarization might be circular facing the wings given the em fields
Time for a hike to demo it?... :)
They always say RF is a dark art and it's things like this that prove it.
Be interesting to see if anyone has an answer.
Very nice construction
How about a test with hinged wings, moving them gradually closer while observing the result on the analyser.
Would be interesting to see your comparison to the Kathrein antenna, the other way around.
Meaning a sector antenna with biquad elements.
I guess it should be able to get pretty defined beams for a very directional application, which would of course not be very useful for covering a lot of cellphones but I think it is an interesting thought.
My guess would be, that the wings make the beam a bit narrower, so the beam fits a little bit better into the parabolic reflector and less radiation passes it by. More energy hitting the reflector equals the amount of more driving energy times the expected gain caused by the reflector. There you are.
Nice clean defined trace,... I wonder how many local access points it would capture above 80%
.
The power of the parabola 😁👍
Hello Mr. Andrew what are dimensions of element and what is diameter of coper wire you have used? Tnx for great videos and greetings from Serbia.
I was going to try your favourite 2.4ghz 3 element yagi as a feed but seeing this I may try a biquad first. If you've still got that 5ghz wifi cantenna laying around that may fit in the LNB bracket too.
What books do you recommend about antennas and electromagnetic waves?
Looking forward to the LTE band 3 or LTE patch panel cellular router antenna. Many cheap single PCB antennas there. Expensive without justified results. You can save 100s /1000s dollars of viewers with your expertise. Could you please suggest any schematic diagram?
yes cellular is most important than wifi range because many of us have no access to fiber line and making antenna will be great to save money and with great tested result🤔👌👍
@andrew please save us by doing something for LTE band 3
Working on it I know it's popular
Amazing videos! First channel where I can easily understand concept/build.
I assume increasing length of wings would make the F2B ratio better, would it improve the range? Would be interesting to experiment with angle and length and see if there is correlation between surface area of wings (4 sides vs 2) and range/signal.
It seems to me that if a curved back as you have also made before but all 4 sides at a 45° angle like simulating a parabolic dish would also improve signal reflections ? Or is that not how these things work.. ¿
If I had to guess, maybe those wings are acting as some kind of half wavelength waveguide? Since they are so close to the edges of the biquad, which is about a half wave in horizontal length in this set up, the gap to allow in horizontal waves in is fairly resonant. It may at least explain the lack of wideband response normally seen in biquaud antennas. Do single-quad antennas also have a natural impedance close to 50ohm? I'm not sure but would love to see a MIMO version of this either way, since long range WIFI benefits from it hugely in speed and reliability, and a parabolic reflector setup is exactly when it should be leveraged most. I wondered if the wings were thinning the beamwidth of the antenna, but I think you're correct in saying they don't effect it, as they would likely need to be considerably longer to cut off part of the reflector's gain. Great video Andrew.
There is something going on with the waveguide. Just need to do some reading and testing.
And I have just ordered a dual LMB holder.
Would have loved to see it tested on a dish to see what signal strength it has combined, also would a cantenna be better on a dish or a biquad ?
It's important to use as much of the surface area of the reflector as possible, and that means having a wide beamwidth on the antenna you have at the feed. Cantennas normally have a very narrow beamwidth, but it can be expanded significantly by shortening the can and adding a horn. Andrew actually has an older video on this channel of just that.
Next time!
Compair this to your sardines can biquad antenna from years ago
What a good idea, when i built that I did not have the test equipment I have now. Could be interesting.
@@andrewmcneil as my father use to say nothing is greater than an ideal that's time has come. I tend to say the same also
Hi Mr. Andrew
Do you think that if you use WiFi Gun as a feed for dish, it will not have a longer range than the Biquad Antenna ?
Because the Yagi Disk Antenna alone has a good gain and range, in your opinion it is not more suitable for the dish than the Biquad due to its round and disc design and it receives the most waves at the focus point of the dish.
Please make a video and use the Yagi Disk Antenna as a feed for dish, thank you.
Hi, can you show us how to make an 868mhz antenna with a fair decent range like your modified antenna video "5 GHz Collinear Antenna"
If you lower from 1,5 cm to 3,4,5 mm like side distance and add other 2 side walls .. Well is just a thought .. :)
any plans for videos on 868mhz antenna i think the helium people need your expertise
the angle of the element to the dish and distance are critical.
very
Has anyone tried to build a router into a large LNB so you can have the signal on 5GHZ in either Horizontal or Vertical polarization or for that matter take a VIASAT two way transceiver module and associated dish and move the TX/RX frequency to 5.0-7.0Ghz
Hey I’m from a remote area and in need of knowledge on how to tap WiFi using satellite dishes
How much dBi gain could we expect on 2.4 ghz with this setup? And can i use Sma cable?
Most of your biquads have the driven element connected with an exposed center conductor. Now its isolated by the tube like MartyBugs used to do it. Could this make the difference? Is that exposed center conductor acting like a balun?
This is connected to coax directly so I use a tube to add stability. When using a N type or SMA there is no need for a tube. The tube length has no effect on the antenna.
may I kindly ask what are the dimensions of your biquad elements? thank you really
Thank you Andrew for the design, will a convex reflector behind the biquad better than a flat one ?
Yes it would
@@andrewmcneil Hello Andrew! Thank you so much for making these videos. Should the biquad elements be convex-ated to conform to reflector and maintain 15mm optimum distance? i.e. higher tips/points...
@@thomasnorton8390 maintain 15mm
I would like to see a design for 800mhz, band20 cellular. Also how would I make it a crosspolarized antenna for mimo?
Trust me, don't. They are a pain in the ass to make, and can be bought on Ebay for next to nothing. Strapping a low-gain MIMO antenna to the feed point will be more than significant and will give you wideband capabilities, just replace the crap coax that comes attached to it. Way less work for better results. Hope this helps.
How much gain you would get with this setup?
Depends on the size of your dish
How about mounting a cantenna to a satellite dish? Would that work?
Yes! However it's important to use as much of the surface area of the reflector as possible, and that means having a wide beamwidth on the antenna you have at the feed. Cantennas normally have a very narrow beamwidth, but it can be expanded significantly by shortening the can and adding a horn. Andrew actually has an older video on this channel of just that.
@@beansfoundhere thanks for your reply :)
make a swastika for it and reverse it, then compare it to that quad antenna