Posts Tagged ‘pcb’

11dbi SMC Panel

Sunday, May 13th, 2007

First I wish to say that I build and tested this antenna, and I was SURPRISED – how this small device is able to work so good! This small antenna outperform my other two homebuilt 14dbi wifi panels.

I used two one sided pcb to create this, but on the zero forum there are pictures where only thin metal sheets are used, and it works again.

The diameter of the circle is equal to the half wave light of the 2.4ghz wifi band or 62mm , so this antenna may be recalculated for other /5ghz/ frequencies.

Now antenna INFO :

Name of Antenna, model : SMCANT-DIFP11

Data sheet can be found on this link : http://www.smc.com/files/AP%5CDS_ANT.pdf

Frequency : 2.400 – 2.500 GHz
Gain : 11 dBi
VSWR : < 1.22
POLARIZATION : Circular
BEAM WIDTH • Horizontal: 70° • Vertical: 70°
IMPEDANCE • 50 Ohms
DIMENSIONS • 25 x 102 x 102 mm

smcant_difp11.jpg

So here is the interesting part – this one is found disassembled on www.zero13wireless.net

 

 

Link to the forum www.zero13wireless.net

smc-panel-11dbis.jpg

smc-panel-11dbis_trasera.jpg
circulo_smc_11dbis.jpg

Very small! Great results!

Dimensions of the reflector are 105×105 mm

8 mm gap between two metal plates of the “circle” and the reflector.

Here are my test whit this antenna – the original test was for other but I need something to compare :

http://www.digdice.com/2007/05/17/d-link-ant24-1200-sector-panel-antenna/

Here is the way to stack two of these homebuilt antennas together : http://www.digdice.com/2007/08/10/httpwwwdigdicecomwp-adminpost-newphp/

14dbi panel antenna

Saturday, May 12th, 2007

This antenna has interesting story for me – I meet it in several sites. It lies around for two or more years and I regular find some pics for it. Its interesting design of the active elements and feeding.

It looks like that several of these antennas are opened – one in greek and one is posted in sveasoft forums. Another recently found info in one german forum.

The main thing is that this one is two sides pcb board whit printed on it 4 biquads which are feeded whit microstip lines and connected whit coax in the center.

The good thing about this antenna is its DIMENSIONS – its VERY SMALL ! Only 15 x 16 cm !

As we know small is beautiful so this one is perfect for implementing in small box whit AP and use very small coax line .

The original is : SuperPass. They sold this ones as OEM kit antenna, but already stopped this product.

Model is : SPFPGH14

There was some pictures and scans on sveasoft forums also guiding dimension.

sveasoft scan

reflector psition

Also the is some greek pic of this from http://patraswireless.net/antennas.html

It seems to consists of 8 closed loop dipoles (approx. 320 Ohm each) in phase, binding together with microstrip match lines.
8 dipoles – no f way.

More pictures may be found here and dates are by 2004 year 🙂 but I found this one now.

Finally I posted it in wifi-connects.ru forums and there we collect some dimensions and tuskan tested the antenna. A lot of thanks to tuskan and gunner05.

Drawing by gunner05 in adobe illustrator format.

Here is the page whit tuskan /i think/ antenna and explanations in russian. He build and tested several of these antennas – by his opinion they perform well for the given gain ~14dbi.

http://vbm.lan23.ru/wifi/Panel14.html

It seems to work well, also antenna is grounded.

I still can’t find time to test one of these 🙂

The original russian forum wifi-connect.ru but all collaboration was there.

Soon I will post diy technique to make pcb boards.