wrote in message
ups.com...
Hi Group,

D-link has a vertical antenna for WiFi applications which is about a
foot long and operates at 2.4 GHz with a stated 7dbi gain.

Since the antenna is a vertical, I thought that the best low-angle
radiation is 5/8 wave for verticals, anything longer would put the
lobes higher and would result in a lower low angle gain.

If this is the case then the antenna should only be about 3.5 inches
long. ?

I am going to check, but I bet the true antenna is only about this
lenght and the rest of the lenght is the plastic, so the appeal is
bigger is better.

Any thoughts on this?

Unless you can see the wire, it may not just have a single radiator. We used
some Andrew 2GHz antennas at work that were about 3 feet long, and an inch
thick. I believe it was made up of multile 1/2 wave phased radiators.

Tam/WB2TT