Ray,
I think that is 'stretching' the facts a bit.
A halfwave dipole is a halfwave dipole whether fed at the center or at
an end or somewhere in between.
The radiation pattern and efficiency is the same.
The problem is that an end fed resonant dipole does need a little bit of
a counterpoise (0.05 wavelength) in order to be able to feed it properly.
73,
Don W3FPR
On 2/11/2017 4:07 PM, Gmail wrote:
As was said previously, all end fed antennas are monopoles with displacement
current flowing from the antenna element to earth. Unlike dipoles where the
displacement currents flow from element to element.
So without an adequate radial system to reduce the ground loss all end Feds
regardless of length are only about 10% efficient.
There are good reasons why 45 years ago when coax became readily available we
switched from endfed monopoles to dipoles.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
