lu6etj wrote in
:

Hi

I found it (thank you to all for your helping)

The name of the feeding system I was looking for is:" Balanced
Capacitive Matching", and as Ralph Mowery said, it is a system
patented by the Mosley company see =
http://www.mosley-electronics.com/page%20files/faq.htm for
explanations.

Miguel,

I browsed your reference.

The text following "MOSLEY TRAP MASTER AND POWER MASTER SERIES... A
Discussion of Beam Antenna Feed Systems" is typical BS that comes from
antenna manufacturers with more interest in taking your money than an
understanding of how things work.

For example, the justification of unbalanced feed of the split dipole is
sheer technical nonsense.

Owen

Owen