Posts Tagged ‘PCB board’

2.4Ghz Yagi Antenna for WIFI – using single sided PCB board

Friday, October 5th, 2007

I don’t like Yagi antennas /sorry/, and I never try to make one , but this look interesting – it is only one side pcb design that differ from the most dual sided similar.

On the side is said that this antenna is a clone to a commercial one, but not a name or model is mentioned.

The dual sided board is needed to make the feeding point of the yagi antenna – here we have something very interesting and different to be able to make all needed parts on one sided PCB board. In fact this is dipole.

Link to the page : http://www.aribg.it/Tech/WiFi/Yagy24ydm/yagi24ghz.htm

Here is schematic :

layout.JPG

Here some pictures whit dimensions :

quote1.jpg

quote2.jpg

antenn9.jpg

On the second picture You can see haw to assemble the dipole – this is the interesting part. This antenna is feeded by dipole not whit loop like most Yagi antennas. Here they make a balun whit the stripped coax and the pcb board.

There is also one aluminum disk used to hold the board that is used as reflector :

antenn6.jpgantenn7.jpgantenn13.jpg

On the site is said that this antenna have 11.5dB gain. And for last there is a SWR test for this antenna pretty good results I thing :

antenn14.jpg

The peek is little out of wifi band but we still may get very good results for wlan applications.

DIY Hi-Gain Antenna on Cheap ;)

Friday, August 31st, 2007


Very Cheap Dipole feeders – they are easy to be build and you do not need a lot or expensive materials. Everything here can be made from wire or scrap /I watch too much scarpwars on Discovery channel 🙂 /

I found some very interesting looking feeders for dishes – VERY cheap to make, first is made only from feeder line 🙂 or simple coax.

http://patraswireless.net/antennas.html

dipoledipole

A simple dipole feed. Good solution to illuminate parabolic constructions (solid, grid etc.) Heliax holds the dipole, as well as feeds the N-type female connector to the back. Tests shown 4 dBi (against Lucent 24 dBi parabolic grid). “

Second is Russian of course http://www.hub.ru/forum/index.php?showtopic=16285

Name of the file is interesting too D_Linc3_008.jpg

d_linc3_008.jpg

Interesting materials – onli several pieces of pcb board are used – very good.

From the same forum are these too –

d1.jpg d2.jpgdipole_construction.gif

Last pic is from http://martybugs.net/wireless/conifermods2.cgi

And for the end howto make wire reflector or DIY Parabolic Grid Reflector

diy reflector

Info is from this : http://www.zero13wireless.net/foro/showthread.php?t=248

19dbi gird blueprint :

19dbi gird blueprint

For me is easy to buy small offset dish – 80cm is around 10 to 15 Euros here.

D-Link Ant24-1200 Sector Panel Antenna

Thursday, May 17th, 2007


D-Link Ant24-1200 Sector Panel Antenna

Gain : 12 dbi

web site : www.zero13wireless.net
dlink_ant24-1200_2.jpgdlink_ant24-1200_3.jpgD-Link Ant24-1200 Sector Panel Antenna

So I make one but still cant get it working.
p1010585.jpgp1010584.jpg

In the test witch netstumbler – i get too low results – may be something is wrong, maybe material of pcb board is not the same 🙁

My TEST for dwl 12dbi thing something is wrong whit my ones :

this is room test – distance ~2m
linksys wap11 whit original antenna – AP
zydas zd1211 usb whit rpsma connector soldered and 5 cm coax soldered to antennas.
various antennas tested to be able to compare result.

Second test – tv tower ~1.5 to 1.8km

Same antennas – near same ressults
rubber duckie 2dbi , smc 11 clone , trend omni – original , interline 14 dbi clone and dwl 12dbi

I tried different position of the reflector I used another piece of pcb – no results .
Maybe the material of the pcb board does matter???

Another thing is the low result of interline 14 panel – i was tested it before and get good results.

I’ll make some more tests but i’m loosing faith in this one 🙂

Here is the link to the forum from where i take blueprints for this one http://wireless.com.pt/forum/viewtopic.php?t=14978