Modifying a 2 4 GHz dipole antenna to 5 GHz #55

In this video I convert a 2.4 GHz dipole antenna into a 5 GHz antenna. I needed quite a few 5 GHz antennas for a project I am working on and it was much cheaper to modify 2.4 GHz antennas.

[jabbawok]

I was just about to say the thing about the 2.4ghz 1/4 being near enough a 5ghz 1/2 wave length. It’s great to see someone backing up their reasoning with evidence. Nice work.

[ronparker]

Excellent video, "Bloke." lol
I always enjoy watching/listening to folks with a "British" accent. I spent over two years in England during the early 60s in the USAF. Really appreciated the people there, especially the ladies. :) Keep up the good work! Ron

[trahim]

Love these videos. I find all things RF fascinating.

[brititalia]

Allbeit late but Congrats. from an old timer...! glad the RF rules are still respected and observed...Thank you and 73!

[FourQ]

Thanks Andrew for this. I need some sacrificial 2.4GHz aerials. We're completely oversaturated with wifi in our area so a properly tuned radio might just give that extra performance we're looking for.

[HoverbotTV]

I'm going to be aking a pair of patch and biquads in 5.8ghz and your vids help a lot.

[salat]

About the super exact measurements:  The 5 GHz band is really wide (goes from ~5, 1 to 5, 7 GHz in EU - that's a wavelength difference of ~6mm), so that the exact length you measure is only valid for about one particular channel, right? I guess that was what the fellow ham wanted to get over. Just go for the middle :)
Also, don't underestimate the influence of the sleeve material as it adds capacitance. We used some layers of simple heat shrink tubing to modify a 70cm band rubber antenna from 470 MHz to 435 MHz - that'll work on those little 5 GHz ones, too - also any hardware/wall/plant/whatever in the near proximity of the antenna might change it's resonance frequency.

If you wanted another 500m range I'd rather use some stacked antenna version like you built before.

Please excuse my English - it's a little rusty and may sound a little harsh (really not intended) :)

Keep up the good work!

[seavil]

awesome video thank you!
Can you make a video on how to Tune a dipole antenna with the decoupler/metal casing. I would really appreciate it thanks

[ruddyruff]

If u still have spares for the 5ghz antenna, do u mind selling 'em on ebay? I would buy them !

[kenknerr]

Is there a difference in impedance matching between the two antennae?

[derekblankmccoy]

Hi, whats a good place to buy the antennas from?

[MrTerrymiff]

I'd like to know whether your spectrum analyser/network tester reads out in volts or watts? If it is in watts then the difference between the two antennae is only about 0.4dB or 0.8dB if it reads in volts. Either way the gain seems, to me, to be nothing to write home about.

Also, you did not appear to put any insulation between the tube and the braid back behind the solder joint. If you didn't then the tube would have no effect on the properties of the antenna w.r.t. just cutting the braid off and having no tube.

[illfather]

Interesting.. thanks for the knowledge

[filozof]

Hello, And what with dual band antennas? I have got Asus N66U router and would like to provide it with better antennas.

[aminkhan]

Hi Andrew, hope you are well, I was wondering if you can recommend cheap 5ghz only antenna, I'm modding a router that has existing 5ghz pcb antenna

[MACYNET]

it's better use copper for antenna instead stainlesss?

[PUNKSTER]

How do you work out the length of the loading coil?

[MrOmiez]

Andrew it would be interesting to show how to make a dual-band antenna to use with routers that have simultaneous 2, 4 and 5ghz like WDR-4300 Tp-Link.
Can you make a tutorial for an antenna with 8db or more?

[kavindugilshan]

How did you calculate 13.4mm ?? Please explain

[christophreiser]

Hi Andrew,
I am a Novis to Wifi and antennas and find your videos very informative and easy to understand.

I need to extend my WIFI signal about 200m through several outbuildings, I guess two roofs from cement tiles  and perhaps five standard brick walls. 

I am hesitant to put my antenna outside, as I live in a world highest lightning area, and am under the impression that a wet cement tile roof, prevents the lightning from hitting my equipment. I do have two CPE's (Airlive Airmax2 X 2) but only get a very poor link (inbuilt 10dBi patch antenna) on each unit.

The CPE's have the option to connect an external Antennas with R-SMA connectors. What antenna would you recommend, and is there already an existing video on how its done?

Thank you for your time and effort spent in attending to my inquiry

Looking forward to your reply

Regards

Christoph