June 9th 09, 11:00 AM
posted to rec.radio.amateur.antenna
|
|
external usenet poster
|
|
First recorded activity by RadioBanter: Jun 2006
Posts: 1,374
|
|
Electromagnetic wave question
Peter wrote:
In the electric power industry there is increasing public concern regarding
fields around power lines. The general public often refers to these fields
as electromagnetic radiation, which it is not. We generally are concerned
with magnetic fields and less often with the electric charge fields. The two
are treated as separate issues.
I believe the same is true of antennas, that is the electric and magnetic
fields are separate when you are close in to the antenna in terms of
wave-length.
Question:
If this assumption is correct at what point or distance do the two
relatively independent fields become the one all important electromagnetic
wave?
Peter VK6YSF
http://members.optushome.com.au/vk6ysf/vk6ysf/main.htm
The assumption is not correct.
Roy Lewallen, W7EL
|