Don Gillies wrote:
In all the antenna books I have read there are copious diagrams of voltage
distributions along the various types of antenna, but as far as I can see,
none of them has explained where the two points are that the voltage is
being measured between. Can anyone enlighten me on this please?

DG

Hi Don, If one is making a voltage reading, it is between a
reference node, 0.0 volts and a point which is higher or lower in
potential. The voltage distribution on the antennas you saw are
probably with respect to earth or the rest of the universe if you are
in space. This is the reference for the voltage along the antenna.
Volts and current on an antenna are periodic if the antenna is
radiating continously, and you can measure potential difference between
different points along the antenna. I don't think this is what the
diagrams you saw refer, it is with respect to earth, or ground.
73 Gary N4AST