William E. Sabin wrote:
I believe (intuitively) that the reactive E and H near-fields
collaborate to create an impedance transformation function, in much the
same way as a lumped-element reactive L and C network. In other words,
energy shuffling between inductive and capacitive fields do the job and
the E and H fields modify to the real values of free space. The details
of this are murky, But I believe the basic idea is correct.

_Optics_, by Hecht, has a section 2.10 - Cylindrical Waves.
There is an interesting statement in that section: "No solutions
in terms of arbitrary functions can now be found as there were
for both spherical and plane waves."

The net reactive impedance component on a standing-wave antenna
is the result of the superposition of forward and reflected waves
on the standing-wave antenna. Presumably, a traveling-wave antenna,
like a terminated Rhombic, doesn't have reactive impedance components.

So my question is: Since the voltage and current are always in phase
in a traveling-wave antenna, is the near field of a traveling-wave
antenna ever reactive?
--
73, Cecil, W5DXP