Crazy George wrote:
. . .
Loops respond to magnetic fields, and dipoles respond to electric fields. . .

That's not at all true. Both kinds of antennas respond to both electric
and magnetic fields.

An *electrically small* loop responds more strongly to a magnetic than
an electric field only if the source of the field is much closer than a
wavelength. Likewise, an *electrically small* dipole responds more
strongly to an electric than a magnetic field only if the source of the
field is much closer than a wavelength. At some distance from the source
still less than a wavelength, they actually reverse -- the short dipole
responds more strongly to a magnetic field than a small loop, and the
small loop responds more strongly to an electric field than a short dipole.

The response of electrically large (on the order of a half wavelength
and larger) dipoles and loops to electric and magnetic fields depends on
the direction and distance to the source. No single rule of thumb can be
used when the source is very close to anything but an electrically small
antenna. The relative responses of *all* antennas to electric and
magnetic fields are essentially the same as each other if the source is
a fair fraction of a wavelength away (i.e., the antenna is in the far
field of the source).

Roy Lewallen, W7EL