Re[2]: [Antennas] WiFi Antenna

[Elliott Olson]

Hello Mike,

But I've read that after 4 sections, you're starting to lose more
signal to drive those additional segments. 4-5 is about optimum.


Thursday, April 22, 2004, 8:41:17 AM, you wrote:

MG> At 06:06 AM 4/22/2004, Demetre Koumanakos wrote:
>>Hi All,
>>
>>I'm looking for construction plans for a 2.4 Ghz (WiFi) vertical (non
>>directive) antenna.
>>I found easy antennas to construct on the net, but all of them are
>>dicectional.
>>Anyone have any plans for a high gain (9db and over) vertical ??


MG> Demetre:

MG> Try http://www.guerrilla.net/reference/antennas/2ghz_collinear_omni_lowpwr/

MG> I built one of these collinear antennas and it works quite well to an 
MG> Orinoco AP for my neighbors to receive.

MG> It is 5 dBi, but additional gain could be realized by phasing additional 
MG> 1/4 segments.  9 dB is quite a lot of gain for a vertical antenna.  A 
MG> non-directional antenna would be an isotropic antenna, and 
MG> theoretical.  Any antenna with gain will have directionality.  A 9 dB 
MG> vertical would have quite a squashed donut of pattern or directivity.

MG> I hope this helps.  73, Mike kf4fdj 

-- 
Best regards,
 Elliott   N0UKF                      mailto:n0ukf@wiktel.com
www.qsl.net/n0ukf/