!! Coaxial Collinear

{http://www.guerrilla.net/reference/antennas/2ghz_collinear_omni/last_element_top_of_array.jpg  Partial assembly drawing}

A Coaxial Collinear is a common omnidirectional antenna made up of 1/2 wave sections of coaxial cable connected in series, but out of phase with each other.  Here's a couple of references for building that high gain omnidirectional antenna.



!! These three links appear down at the moment. (18/6/06)



(http://www.guerrilla.net/reference/antennas/2ghz_collinear_omni/  A 2.4Ghz Vertical Collinear Antenna for 802.11 Applications) -- 2.4Ghz specific.



(http://www.repeater-builder.com/rbtip/wa6svt.html  Omni-Gain Vertical Collinear for VHF and UHF) -- More info, though aimed at lower frequencies



!! Vertical Collinear

Instructions for building the following  (http://www.guerrilla.net/reference/antennas/2ghz_collinear_omni_lowpwr/ Vertical Collinear)

{http://www.guerrilla.net/reference/antennas/2ghz_collinear_omni_lowpwr/Full_assy_diag.jpg Full assembly drawing}