[TowerTalk] More fun with ground plane modeling

[Jim Brown]

On Wed,9/10/2014 10:53 AM, Bill Turner wrote:
> Presto - a two band antenna with SWR of less than 2:1 and no traps or
> switching and just one simple vertical element. 2:1 is well within the
> capability of my rig and at such low frequencies, the loss from SWR is
> negligible. Azimuth and elevation patterns are essentially the same as
> with full length radials.

SWR is a lousy measure of antenna performance -- the only thing it 
indicates is match to the chosen transmission line. Far better to 
compute the full 3-D field strength and study field strength at the 
desired vertical and horizontal angles.

73, Jim K9YC