5GHz Coax Dipole Omnidirectional Antenna
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- Опубліковано 18 вер 2024
- 5GHz coax dipole, omnidirectional antenna. Normally these antennas are made entirely from coax. My method though replaces the outer braided copper wire with metal tubes cut to the correct wavelength. This method is much easier to construct and get the wavelength correct in each section of the antenna.
The 2.4GHz version of this antenna gives around 6db gain. Testing the 5GHz version seems to give around the same 6db.
Use a coax with a solid copper centre element. Metal tubes salvaged from cheap telescopic antennas.
5.8GHz ¼ wavelength 12.93mm
5.5GHz ¼ wavelength 13.61mm
5.2GHz ¼ wavelength 14.42mm
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You are the DIY guru of wifi antennas.
That antenna⍒was a "labor of love". Coax is tough enough to strip (correctly) without the pieces being that short. Very nice work. p.s. I didn't know about VisTumbler. WiFi Stumbler yes... But this app rocks ✔. Thank you for the video! Cheers ✌
I'am a big fan , of all your works :)
Thanks Tarek :-)
Hello, yes it is colinear antenna.
You don't need to take care of velocity coefficient of the cable about 0.7 for coaxial ?
About 13 mm X 0.7 = 9 mm ?
Ordinarely we do that for colinear antena
Cheers and 73 from France
Like a lot of your videos on types of wireless antennas. :D
Hi andrew, I'm not sure if I'm more impressed with your practical hands on construction genius or your electronics knowledge; either way, I love your videos.
Please could you confirm that to use this construction method for a 2.4 GHz antenna, the length of the metal bits would be 31.25mm?
Also, in theory, does the more segments I use=the higher potential gain of the antenna?
Thanks.
Use copper or tin as you need to solder so aluminium is no good.
I am Brazilian. great antenna, like video and design . I made one using this copper tube in place of these other materials you used , and was very good , I made a 12 dBi
Alex Eletrônica Any photos Alex?
andrew mcneil Pictures of what?
Alex Eletrônica The antenna you made.
How did you know it was 12dBi and not 10dBi?
Couple of questions on this one. I'm trying to create a coax collinear as well. From my reading the end 'whip' length should be 1/4 wavelength "in air" length, which is actually different from the other elements in the antenna as the velocity factor is different. Some designs also add a decoupling sleeve at the base, which again, is 1/4 wavelength with VF 1.0 due to being in air. Can you comment on this please? Mine I'm building for 3G which is around 850MHz. LM200 cable with 4mm external diameter copper tube is what I am using.
*Update - Built one. Works really well. The decoupler is 1/4 in air, followed by 1/4, segment, then 7 half wave segments, topped by a quarter then a whip which is 1/4 in air. Allowed me to get signal at location where previously extremely difficult. I may write it up.
Great video Andrew, would LMR400 be more suitable for construction material? If I were to scale your measurements would it still be useable for the 5Ghz ? the inner solid conductor diameter is 2.74 mm for lmr400.
hi it is not a metal based paint just silver as you are right if it was it would not work. you do have 5ghz in Australia just not as popular as 2.4GHz but it is growing in popularity as there is less interference.
Hi, nice job.
I would to build a 2.4Ghz antenna on same pattern.
Do you have the exact measurements for 2.4Ghz ?
Also, is there a limit to the number of elements in the Antenna ?
31.5 mm, yes there is a limit tplink used to make these with 24 elements after that it effects the performance of the antenna.
@@andrewmcneil Thanks Andrew. Do you have link to a plan with all exact measurements for 2.4Ghz ? I'm going to start building it this week-end and use it with my Tp-Link WBS210.
i don't but if you have a look at this page it will get you started www.rason.org/Projects/collant/collant.htm
i think you did make this wrong: not each pipe has to be 1/4wave but every sector, start one pipe to start of the next... or am i wrong?
yep 2.4Ghz is just stuffed with noise. might look in to 5Ghz Wifi . thanks for the reply
Awesome video U made it look so easy! Can u please provide a ebay/amazon link to buy the metal tubes
Do colinear segments have to be perfectly offset from one side to the other like that? If they aren’t will performance be affectedB
Hi Andrew, Great stuff. How many mm is the 1/4 wavelength at the top( The extender)?
For lengths you can use this handy calculator: jeroen.steeman.org/Antenna/collinear-coax
My only concern, stripping the insulation from the coax and inserting it into a copper tube probably increases the velocity factor of the cable, (pushing it closer to 1.0) I do not have equipment to measure the VF.
Hi, I do not speak english, can you tell me what your name is, the small people, at the end of the pvc tube, where can you buy them? or what are
Great work! :) So, a total of ten elements (including the connector side), plus a copper-only "tail"?
Also, if my router/adapter has 2 antennas, can I replace them with 2 of these?
So what you are saying is, i can replace stock router dual band antenna with this custom made and will improve signal by let say 30% or more ?
I'm catching up sorry Andrew. What gauge coax is that?
grtz PE1-PSU
WiFi is 2.4ghz in Australia , is WiFi 5ghz in the UK ? .also, i thought metalized paint was a bad idea for an antenna . but it looks like it works
i love your videos and i want to tell u some thing u are the best . i have a question this tubes is it couper or aluminium?
please answer me because iwant to make this antenna
Good
Where can i buy all that tools?
tryout a Biconical antenna with 2 cones without a flat disc
Can this antenna by put on a Vodafone modem it has no antenna so i'll be needing your help where to locate on board when i open it
Wrt54g v6 linsys has 2 antenna, can I splice them together with coax T
and as it is the last piece of coaxial cable ,,, UNITE WITH NEUTRAL FACE TO MAKE RETURN OR REMAIN SIMPLEMEN anbos LOOSE '?
4:00
Why are you cutting into small pieces what is the purpose of this ?
It's the length of a 1/4 wave of the frequency he is using
soo i can make a crap ton and it will be higher db?
Can I use this antenna to a modem 3g / 4g lite?
hi need how many centimeter is each
space copper wire
Where can I get the tubes you are using you weren't clear on that
trimmed bits of telescopic antenna, the ones you find attached to a FM radio.
see the picture in this link:
www.google.com/search?q=telescopic+antenna&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjUir_OudrUAhVBMJoKHaXaBoUQ_AUICigB&biw=1280&bih=687#imgrc=eyMa830MHroDZM:
how to get the wavelenth for 3.5ghz dipole?
what is the antenna gain fr this
How did it work on your wifi
How to build antenna that can pickup frequencies of cosmic rays or higher frequencies? Google "Cosmic Ray Antenna".
twitter.com/andrew__mcneil/status/1260562824625094656/photo/1
@@andrewmcneil Build video coming?
@@Xeno_Bardock Yep it is going to be my new hobby now I am semi retired
how about a 3.5ghz?
your antenna does not work
me likes!
сложна
lah manehmah teu bener......
every one does good antenas and i does shity antenas... why?
good
how to get the wavelenth for 3.5ghz?