estqwerty’s wifi antennas

All my links for antennas whit multi polarization

List of all products of wifi-plus : www.wifi-plus.com/antennas
Lets begin whit this page here : http://www.dslreports.com/forum/remark,13636968

You can find comparison of 5dbi multi polarized to 7dbi rubber duck : www.zero13wireless.net
Tested model is : MP 5 OMNI 5dBi CHP

Dimensions of the 17dbi model :

http://www.zero13wireless.net/foro/showpost.php?p=5579&postcount=2

Here a tread whit all the dimensions and tests, also home build versions of 17dbi antenna :
http://www.zero13wireless.net/foro/showthread.php?t=881

Here You can find a test between 12dbi MP and 14 Yagi in the forest :
http://www.zero13wireless.net/foro/showthread.php?t=1750

MP 12dbi The same as 17dbi version only shorter :

http://www.zero13wireless.net/foro/attachment.php?attachmentid=1115&d=1185362179

Pictures of 12dbi version

Pictures of Bullet Omni 3dbi (2.4/5.X GHz) and Omni 5dbi (2.4/5.X GHz)
http://www.zero13wireless.net

In the net there was also some pdf pathent files one is here : click

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 :

Here some pictures whit dimensions :

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 :

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 :

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

I always wonder haw to feed waveguide or horn from the back - all the designs are feeded from side as usual Cantennas.

Now I have picture - file is pretty old but interesting.

I cannot remember from where I take the PDF file to write a link. Here it is 8602-4.pdf ,I didn’t change the name of the file.

Most interesting is that the connector is on the back - also wide band feeder is used and antenna is DC grounded - which differ from original cantenna design.

I used a lot of cantenas and this will be tested at first possible moment.

Also may be used in slotted waveguides.

This is interesting russian antenna. Small sector antenna, gain is only 10 to 12 dbi.

From this site I can find that the price of this is nearly 200 euros or 260$ !!!

http://shop.itconnection.ru/product_info.php?cPath=26_57&products_id=131&osCsid=f5a43f3c297c0be57043aa716207b935

Quick specifications :

In the russian forums for a lot of antennas this last “Input is DC-circuited” is very critical ! There is some sort of fanaticism about this may be the weather there, I’m not sure why.

Here is link to some pictures of the interior from here :

http://vbm.lan23.ru/wifi/grad2487/grad2487.html

What we have under the fiberglass hood - strong plate which hold connector, coax line to the one pcb plate whit four printed dipoles.

The design of the dipoles is very interesting to me - I sow this dipole design several times :

You can find dimensions of this antenna whit lot of pictures www.lan23.ru forum.

I’m not completely sure why this antenna is so interesting to me.

You can search in google for “printed Dipole Antenna with integrated Balun” and will find something very similar to the upper pictures. So design is well known and used from manufacturers.

Here some links :
http://www.cst.com/Content/Applications/Article/ArticlePrintVersion.aspx?articleId=55

http://www.mwjournal.com/journal/article.asp?HH_ID=AR_3769

On these examples balun is madded whit hole trough the plate or “via hole” , but on this antenna we do not have a hole.

BUT without this hole I cannot see this “Input is DC-circuited” thing! Where they close the loop?

Here I find something very similar only multiplied by four for creating omnidirectional antenna :

http://www.mwjournal.com/News/article.asp?HH_ID=AR_4774

And finally one more picture on which we have similar dipole and feeding :

For final this is very complicated antenna extreme hard to be reproduced without proper materials, equipment and software tools.

This shows very professional design whit a lot of variables and places which need to be tunned. For me this antenna is impossible to be built at home.