[Antennas] WiFi Antenna
Mike Gilchrist
[email protected]
2004年4月22日 09:41:17 -0400
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 ??
Demetre:
Try http://www.guerrilla.net/reference/antennas/2ghz_collinear_omni_lowpwr/
I built one of these collinear antennas and it works quite well to an
Orinoco AP for my neighbors to receive.
It is 5 dBi, but additional gain could be realized by phasing additional
1/4 segments. 9 dB is quite a lot of gain for a vertical antenna. A
non-directional antenna would be an isotropic antenna, and
theoretical. Any antenna with gain will have directionality. A 9 dB
vertical would have quite a squashed donut of pattern or directivity.
I hope this helps. 73, Mike kf4fdj