Roy Lewallen wrote:


George Brown, the inventor of the ground plane
antenna, had observed an omnidirectional pattern in the horizontal plane
with only two radials, but the marketing department at RCA insisted on
adding two more to make it look symmetrical before selling them.

Side note, Roy. I take a lot of Morotcycle rides to the north central
part of PA, and being a remote area, that have a fair number of radio
systems to tell them of the shape of the power lines in eh area.

They use a ground plane antenna that consists of a spring mounted
vertical, and two horizontal radials. They are pretty homely.

- 73 de Mike N3LI -