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 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