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[Khanzerbero]

hi.

Heres mi submission for the hackaday desing challenge hope you like it:
PLEASE GO TO THIS LINK if this webpage is taking time to load khanz.colombiaunderground.org
the challenge consists about making a usefull circuit in a credit card`s dimetions PCB with the hackaday logo on it.

My desing is a patch antenna with the antenna itself being the skull logo! Some of the details of the logo have been removed in order to radiate properly and it only has one component and it is the type of connector you want to use to interfase with your wifi card, i suggest SMA edge mount but it can be hard to find, you can use whatever you want provided you can solder the ground to the back of the pcb and the feed to the line.

the desing process consisted building a model based on some physical parameters and by simulation sweep those parameters in order to find the required characteristics.

now the simulation ended with this design with the black part being the part wich will keep the copper and the white part not.

This needs to be made in a double layer pcb and the other layer to remain untouched.
To build this you only have to save it in your computer and print it, be sure to scale it rigth so the outer square remains 90*55mm and deliver it to some pcb printing service and make sure they use FR4, the specs will be given down






 FR4's relative dielectric constant: 4.4 @ 1 GHz.
loss tangent: 0.02.
sustrate thickness: 62 mil (1.5748 mm)
Copper layer thickness:1 oz de cobre in a ft2 (35 μm aprox).

here are some pics i made of it

.


in the pics where you see the soldered part theres where you have to solder the connector

The antenna was tested on a vector network analyzer and the data of the reflected power coeficient  in dBs is plotted here you can see that for the WIFI band the ratio of reflected power is minimun meaning that the antenna is radiating almost all of the power delevered to it. that means the antenna is OK



Field tests were made and the antenna behaved properly with a 2dBi gain in the direction perpendicular to the skull and almost none signal from the back. thanks to that it has almost twice the range of the monopole omni antenna shipped with almost AP.

Its a directive antenna that can be placed against a wall to avoid neigbohrs to get signal from your AP and to Amaze your friends with its cool Shape!!!

Thanks to colombiaunderground.org
without them this could not have been possible hope you guys dont get mad for this, this week i will publish a CuT one!!!

Please forgive my english im not a native speaker, and i dont get to practice a lot.

Khanzerbero

[psykho]

severo y no el ingles no esta tan malo hay erores pero = mi spanol no es muy bueno....  severo men depues de comenta y le pago una...

[Alluz]

Lot of people have been seen this topic.
So popular
Nice desing. lol xD ¿can i use this antenna for war driving? xD

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I want to know more about the antenna, the desing, the formulas, what kind of hardware/software did you use to calculate radiation fields, etc. More questions can be found here

Thanks Pablo.

[Lutio]

Some Question or Expresion about the topics are important to us........to continue working and progresing every time to every body
In The Good

[Khanzerbero]

for wardriving much more gain antennas should b used, but this can work as much as its better than the builtin antennas on pcmcia cards, but other  antenna designs such as yagi uda perform better in narow range specifications for practical purposes.

i cant solve the exact maths required to design such an odd shape, so i made some initial aproximations and simulated a lot with the design restrictions and initial modeling reducing the number of simulations required.

it can be simulated using any MoM software but ansof hfss is the easier one to use.

Flaco sorry for the bandwidth

[ze0n]

Hablen en español...! Si los gringos vienen a ver el post, q traduscan ellos, así como nosotros nos quemamos las pestañas traduciendo las mierdas de ellos..!


Nos vemos

[karlangaz]

but is goood to practice english some time lol its my humild opinion

[c7b3r]

me podrias mandar la copia de la antena???

saludos

[Khanzerbero]

si quiere la antena fisica, bajese la imagen en blaco y negro, imprimala gardando las propociones y toca que se contacte con algun fabricante de "baquelas" supongo que en ciudades con facultades de ingeneiria electronica buenas debe haber por lo menos un fabricante, le manda lo que imprimio, le dice ques doble cara con una de als caras intacta, y el sustrato sea de fibra de vidrio(esto es importante!) y listo salio pa painting!

Si quiere la antena fisica tocara que me mande como 100k pesos, es que mandar a hacer eso es muy mamon ademas toca conseguir el conector adecuado! y no le voy a dar la mia!