On 3 mayo, 03:39, (Richard Harrison) wrote:
Wim, PA3DJS wrote:

"The zig/zag pieces do, however, not contribute to the far field
radiation."

My take is slightly different. The complete antenna can be considered as
made up of infinitely small pieces, each of which contributes to a
wector sum at a distant point in the far field depending on the current
in the tiny segment and its position.

Best regards, Richard Harrison, KB5WZI

Hello Richard,

Agree with the basic principle of (far) field calculation. Regarding
meandering or helical wound:

The longitudinal components reinforce each other, but the lateral
components (zig/zag parts), change direction each time. Therefore the
resultant field (vector sum) is negligible with respect to the field
from the longitudinal components.


Best regards,

Wim
PA3DJS
www.tetech.nl
remove abc first in case of PM