Trees for Antenna Support
Trees are often the only support available for an
antenna whether it be an end fed or dipole antenna design. This can
be during portable/field day/expedition use or home locations.
In many instances one ends up with enough space to mount a metal
pulley rope combination as seen in the graphic below.
Some of the time there is enough space to
bend the antenna without creating too much performance compromise
but at other times there's not even enough room to use a rope and
pulley setup for tree support.
Zepp Antenna History
Zepp antennas derive
their name from the antennas used on the Zeppelin Airships. An
early patent by German Hans Beggerow from 1909 illustrates the
concept of an antenna equipped balloon.
These Zeppelin antennas were wire antennas
that could be trailed behind the the Airship via a mechanical or
electrical winch arrangement. The frequencies used in various
applications included Short Wave, Long Wave, & Very Long
Wave. As these were trailed antennas they used an End Fed
installation Zepp Antennas were a half-wavelength long(or
multiple) and fed with a 1/4 WL (or multiple) open wire feed
line which uses only one of the wires. The feed line provided a
matching section for the transmitter.
Copyright 2011 QZ Electronics