Double Triangular Antenna

[Admin 2545]

(DTA)Double Triangular Antenna is one of the best zig-zag antenna. Her canvas in contrast to the previously discussed antenna differs in that instead of two rhombuses consists of two triangular frames.

The antenna pattern in the horizontal plane with no reflector is an eight

The input impedance of the antenna in the receive frequency range depends on the antenna dimensions and its forms, from the placement of terminals to which is connected a coaxial cable or other transmission train, and also the location in close proximity to antennas of different construction which influence the distribution of electromagnetic field in space. In this case, the antenna is in good agreement with the coaxial cable is 75-Ohm characteristic impedance without other adaptation

This antenna is made by "com666" user.

 

 

[Admin 2545]

,,,good, and here we have the simulation results of these antenna...

[Admin 2545]

 I think this butterfly shape is better...

[Admin 2545]

,,, a new achievement of comm66 user...

[Admin 2545]

,,,we look forward to the size of this antenna, from com666-user...!!!!

[aurel 22]

Interesting shape..

What about this dimensions for 2.4 ghz...

[aurel 22]

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

[aurel 22]

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 .

[Admin 2545]

,,,batwing can not compare to biquad...!!!

,,,this is the simulation for your antenna...

[Admin 2545]

,,, these are the most optimal dimensions ....!!!

 

[aurel 22]

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

[aurel 22]

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% ?

[Admin 2545]

Yes, it could ... show some pictures of what you did ... !!!

[aurel 22]

ok they are here ,,quality is bad 

and  those are just prototypes...he he

one is yagi biquad and second is jensky

when i change cable both work fine ...it looks that jensky work better 

because yagi reqiure more directivity

[Admin 2545]

[aurel 22]

Yes i know 

i will fix that...

[bejonet 58]

is it possible to be formed like this ??

[Admin 2545]

,,,why not....!!!

[bejonet 58]

the length of the 102mm coaxial cable is too short, can it be extended to 153mm or 204mm

[Admin 2545]

24 minutes ago, bejonet said:

the length of the 102mm coaxial cable is too short, can it be extended to 153mm or 204mm

Yes, it can be ... !!! 

[bejonet 58]

another achievement, and yes it work
made from old CPU case, 0.7mm thickness cut by scissor

[bejonet 58]

try to make MiMo but is not good....

[Admin 2545]

,,,the antennas may be positioned at +/- 45 degrees...!!!

,,,X-polarization or cross-polarization...!!!

[Admin 2545]

,,, the basic sketch for batwing antenna by various authors...wl=wavelength

[Admin 2545]

,,, and that would look like a simulation after Kraus...wl=157,78mm  :  F=1,9GHz

 

,,,and a panel antenna with 2x2 patches...