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aurel

BatWing antenna 2.4 ghz

42 posts in this topic

I don't see that here anyone post something like this .

I made it not very precise but dimensions are standard

i mean for such a antenna are

BW_hungary.png

BATWING_24.png

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And here are dimensions..

I use this time 2.5mm2 copper wire, vertikal wires are 0.75mm.

I simply replace biquad shape with this one ..so distance from reflector is 17mm

BATWING_24dim.png

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,,,good, I know the idea but more interesting would be if it was used as an omnidirectional antenna...!!!

 

48.jpg

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Hi Jomy...

i even don't know that such antenna exists before ...

here in my country there is no such a antennas used for big transmitters the our uses wave guides with weird panel antennas.

This small work very well ..in fact work better than ordinary biquad

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,,,,good, I will do a simulation with this antenna...!!!

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Look 

I just calculate dimensions given from this old hungary site and 

my antenna in practice work very very good for vertical polarization 

even i read somewhere that this antenna is best for horizontal polarization and is not

recommended for vertical.

as i said before distance from AP is cca 400 m

and signal strength is for 10% better than with ordinary biquad

do you can explain that for me?

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So as suggestion ...anyone who wish to try 

remove your existing biquad from antenna and solder this element then check signal strength!

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Ok 

i use it with reflector

ok ..resized...

Is that mean that sizes from old paper picture are wrong? 

BW_hungary.png

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mostly ALL parameters CHANGE when you add a reflector...Z (Real and Reactive), Fr , Gain , etc...(imho)

Bat wing antenna

"Batwing antennas generate a horizontally polarized signal. " "The "batwing" shape of the elements is used because it gives the antenna a widebandwidth of approximately 20% of operating frequency at a VSWR of 1.1:1"

 

Edited by clanon
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1 hour ago, aurel said:

Ok 

i use it with reflector

ok ..resized...

Is that mean that sizes from old paper picture are wrong? 

BW_hungary.png

,,,,show me from where did you took the picture ...???

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Clanon, yes that I know, but the dimensions .... ???

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,,,that's the reality....!!!

 

 

 

55.jpg

screenshot_6760.jpg

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,,,but that's for the 75 ohm impedance...!!!

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,,,that's the reality....!!!

Ok 

I can build this one again ..no problem ž

BUT how you get  0.5 lambda  that is 46 ...instead of 60 mm ?

and how you get  0.6 lambda that is 59 mm --- 72 mm ?

 

And  joMy ..i found on several sites that is stated that batwing have only 3db gain

so if mine have 5 that is better..he he !

I will try to build UHF TV version with aluminum wires to see how work as TV antenna with horizontal polarization !

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,,,but that's for the 75 ohm impedance...!!!

Yes  it is for 75 ohm..and i use 75 ohm cable 

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,,,simply the best. from comm666 user..!!!

14337597.jpg

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Yes i see that image before ..

Jomy ..what is the distance of inner wire

i assume 10mm ?  id benter is on 30 mm

BatWingJoMy.png

Edited by aurel

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WOW

11dB ..that is very very good

..and the dimensions are ...in the image above or ?

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