Turnstile UHF RX antenna tutorial

[kev.au]

Got one embedded into my ZII's right wing, it just fits lol. Covered over with light weight filler for a smooth finish.


You guys jelly?.

[roberto]

hav u flown w it?how does it perform??

[kev.au]

Not flown but have range tested, it seems to perform as it should.

I'll keep you posted.

[brosius85]

i would kill for a good 2.4 turnstlye ... any chance at all alex ?

[FabioMussarlz]

Hi Alex, another great antenna design
I have a little question.... Will performance decrease if I add another (male/female) sma connectors between Antena and rx ?

Hereīs an ilustration for better explanation:



Iīll use this antenna on my easyGlider wing and I donīt want to put and remove direct from my DL rx every time. So if I break some SMA conector due to too much use, I just need to solder some new ones

Is my logic OK?

Thanks.

[hugy]

Just built one and taped it to the scout bee will report back tonight after some range testing.

[Zerberro]

you are best!

[hugy]

I think it works

[IBCrazy]

i would kill for a good 2.4 turnstlye ... any chance at all alex ?

You need it for control or video? It would be no good for video.

Here's a quick calculation. I will have to run the simluation and the analyzer to verify it is perfect, but this will be plenty close:

433/2450 = .177

5.85*.177 = 1.02" (26mm) - Short leg distance from center
6.75*.177 = 1.19" (30mm) - Long leg distance from center

Wire gauge = 30-36 AWG (.020 - .030" Welding wire would work)

This will work plenty well. It isn't fully optimized, but 98% efficient or better, which is plenty close. Remember: All dimensions are taken from the very center of the antenna. They must all be done from the same spot. I will see if I can run a full simulation after dinner. I need to jump on the motorcycle to get some gardening tools and return a movie and then dinner. if I have time, I'll get the propagation plots.

-Alex

[IBCrazy]

Hi Alex, another great antenna design
I have a little question.... Will performance decrease if I add another (male/female) sma connectors between Antena and rx ?

Hereīs an ilustration for better explanation:

Attachment 10029

Iīll use this antenna on my easyGlider wing and I donīt want to put and remove direct from my DL rx every time. So if I break some SMA conector due to too much use, I just need to solder some new ones

Is my logic OK?

Thanks.

That will work fine. It's actually a really good idea. Loss with SMA is very low so the reduction is negligible.

I also found a better way to build this antenna... Ok somebody showed me an easier and sturdier way to build it. I will post a picture of a 2.4GHz built via the new style when I get the chance. Working on 5.8GHz helicals right now and I'm getting great results.

-Alex