[Antennas] WiFi Antenna

[DavidE Benedict]

demetre@fastmail.ca writes:
>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 ??
>I remember seeing wire antenna sometime ago, it looked like several 
>vertical diamond loops one on top of the other, but can't remember 
>where I had seen it.
>I checked the 2002 ARRL antenna book with no luck.
>
>Any Ideas ????
>
>73
>Demetre - SV1ENS
>

One more thought:
More gain means more directivity. The classic donut shape radiation
pattern would be flattened considerably at 9 db. And maybe it is good news
that the take-off angle would be low, especially with a J-Pole
configuration. 
--So, instead of a donut shape pattern I think it would more resemble a
mechanic's flat washer at low take-off angle toward the receive stations.

My thinking is that you might have to tilt the vertical axis a small
amount to cause the edge of the concentrated "washer" direct the "beam" to
hitting your selected receive station full force.

David B.
w7dbh
Oregon, USA