DaveC wrote:
On Sun, 5 Jun 2005 07:46:42 -0700, Russ Renaud wrote
(in article ):


So, you place the phase center of your replacement feed at the same
point as the DTV horn's phase center.


One more question:
For a bi-quad, is the phase center located at the plane of the element (the
bent wire)?

Chapter 6-2 shows the phase center of the NBS dual-dipole feed to be .25
wavelength behind the dipoles, and around the same for a quadloop feed.

I suspect the phase center for the biquad is something similar.