Signal Pattern From a Router Dipole Antenna?

Archived from groups: alt.internet.wireless (More info?)

On Wed, 23 Jun 2004 11:42:31 -0700, Hamish McStill <noone@nowhere.com>
wrote:

>Does the signal radiate out from the entire length of the dipole or
>just from the tip?

There's no real point source for the RF. Well, there's the "phase
center" which is mostly used in reference to cantennas and dish feeds.
For a 2.4GHz vertical coaxial antenna, it would be 1/4 wavelength from
the tip or 3.25cm down from the tip. Well, it might be a bit lower
because the rubber covering of the antenna moves the end of the
antenna down slightly. Up or down a few cm isn't goint to make any
difference for a coaxial dipole with a theoretical -3dB vertical
beamwidth of perhaps 120 degrees.

>Trying to determine the best position for the homeade reflector on the
>dipole.

See:
http://www.freeantennas.com/projects/Ez-10/
for such a corner reflector.


--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D 831-336-2558
Santa Cruz CA 95060 AE6KS