"Richard Clark"
A full wave antenna has no advantage over a half wave.
It's mismatch is very bad. No BalUn is going to fix that.
_____________

The peak, free-space gain of a full-wave linear dipole is about 1.65 dB
greater than that of a 1/2-wave dipole. Its center fed impedance is high,
but can be transformed at its feedpoint to match conventional transmission
lines.

Many AM broadcast stations use a 1/2-wave vertical monopole, which when
working against a very good radial ground system constitutes a full-wave
antenna. They do it to improve their groundwave field compared to a 1/4
wave monopole, and to reduce nighttime interference to their groundwave by
their own skywave.

But maybe the typical amateur operator would not consider these benefits
worth the effort.

RF

There is a low impedance feedpoint for a full wavelength 11 meter antenna.
Simply feed it 1/4 wavelength from the end and add an RF choke to the feedline.

------------------------------||----------
||
3 X 2.58 meters || 2.58 meter
feed point

Cecil can tell you the feed system details.

/s/ DD, W1MCE

Richard Fry wrote:

"Richard Clark"

A full wave antenna has no advantage over a half wave.
It's mismatch is very bad. No BalUn is going to fix that.

_____________

The peak, free-space gain of a full-wave linear dipole is about 1.65 dB
greater than that of a 1/2-wave dipole. Its center fed impedance is
high, but can be transformed at its feedpoint to match conventional
transmission lines.

Many AM broadcast stations use a 1/2-wave vertical monopole, which when
working against a very good radial ground system constitutes a full-wave
antenna. They do it to improve their groundwave field compared to a 1/4
wave monopole, and to reduce nighttime interference to their groundwave
by their own skywave.

But maybe the typical amateur operator would not consider these benefits
worth the effort.

RF