Collinear WiFi Antenna

Here is a quick omni-directional antenna that requires very little time and effort to create.

Materials:
Solid copper wire, service entry wire(u.s.) works best
1" dia. schedule 40 pvc endcaps
1" dia. schedule 200 pvc pipe
n-female chassis connector
Silicone sealant

The loops are made at 60mm, 90mm, and 83mm. Each loop is 10mm in diameter.

A hole drilled in the bottom cap to accomodate the n-connector. A bit of Permatex grey gasket maker is the sealant and does a good job of holding the connector in place. 

Links:

http://martybugs.net/wireless/collinear.cgi - martybug.net's compact 6dbi collinear antenna