aurel

I think that i found what was the problem .... it was in wrong coaxial cable i was used tiny 4mm black coax rg..something which I replace with 7mm coax ko.ka 3000. length of cable is 5 m from antenna to wifi card and i get 43...47% of signal with Jensky (4 zigzag ) antenna without reflecor ! voila. With reflector i hope that signal would be over 50% ?

Thanks for simulation and dimensions.. I used for quick % dirty build measures for tringle 30-40-50 and distance from reflector 17mm and as i said signal strength is same like is with standard biquad. As i said ..i have problem with signal from AP which is 400 m from my house. I have optical match with AP antenna which is omni(fabric) and radiate in vertical polarization. So what would be the best option to build for this distance and vertical polarization? I already tried yagi-biquad and when i set in proper direction i dont get any signal? yes...is true BUT when i use extra reflector and turn yagi to this reflector then i get signal... so i catch reflected signal.... but direct i cannot get ? thanks

I replaced classic biquad with batwings element and i can confirm that work the same what means that signal strength is same . I also build biquad yagi with 5 directors(also biquads) and i will test it .

What i can expext if i replace classic biquad with wire with this one? I want improve signal strength ...distance is cca 500m from AP. I mean is it worth to try ...especially if you said that 75 ohm is ok ? thanks

Interesting shape.. What about this dimensions for 2.4 ghz...

I found this antenna on some radio amateur site YU ..i think and i don't get it why is connection point here where IS NOT maximum of current density?

ok

then is there a way to build this one ...

I found this image ..about printed wire sierpinski fractal

ahhh it is attempt to create something useful In fact - we can create wire antenna adding nodes but is tooo slow.

then what is it ?

No i download it from sourceForge you can find it there...

Auuu that one was lame... I found on source forge program called VEMSA3D but i don't know how to work with it?

Is there any other freeware program which can replace CST maybe ? i mean for wire antennas?

Yes why...bad design probably... I don't understand this diagrams very well but i see f= 2.2 not 2.4ghz is that mean something?

Do you can simulate ...design i show in the image above? if is not problem ..i don't have that CST program.

I just cut the Cu wire but i use 2.5mm2 - ordinary electric cu wire which is wider so maybe i get better results..who knows. anyway antenna is easy to build...

Thanks So it is not 19 dB than maximum is 12 dB let say little bit less than double - biquad which is 14 ,,, i think ..right?

What you think about this shape?

Ok ... I think the same .... then if I am not wrong size of Cu wire from feed point is 210 mm...right ? so it is not wave x 2 _= 240 mm ?

,, Yes for that antenna... but something is strange about this shape , it looks that shape don't follow logic of self-similar progression and that is still L/4 or L/8 length ?

he he ..i see but what are the sizes of elements ? or i can just use standard 1/4 lambda ...like in biquad? if i catch some free time tomorrow i will try to build this one...

Hi Admin I have question about 4 zig-zag 2.4ghz antenna How is possible that such a simple design have such a high gain >>19db ? Please ..do you can show a measures of wiries for this antenna ? thanks Aurel

I have wifiSlax ...i think little bit newer version than this one and in general distribution is ok. But there are too many similar programs with lame results. Same or similar programs you may find in Xiaopan,Beini,tinyPaw which are really small distros . I don't know if better results we can get if we use Kali( ..backTrack) which is proclamated as THE BEST pentesting distro. And i really doubt about that..

Thanks ..so it is 46mm ..thanks For image B i am not sure because this is some sort of koch fractal shape but i see somewhere but like this: