Asimov wrote:
"The transmitted energy, although electromagnetic in nature, would not
be referred to as "radiation" since it is bound to the resonant
objects."

A mistaken idea is expressed above. Radiation happens from conductors
carrying radio frequencies. Radiation escapes. That`s a definition of
radio. It`s the energy that gets away. It may be hard to contain.

When a conductor is swept by r-f, the current which flows upon or within
a conductor depends on its impedance. Unless the conductor is without
significant reactance, little current flows. A resonant, and
low-resistance conductor may have a large current flow, depeending also
on the strength of the electromagnetic (r-f) field.

Induced current on a conductor will all be re-radiated if there is no
loss to a load or heat conversion. There is coupling between source and
receiving conductors. A synonym is mutual impedance. Maximum available
power out to a load on an antenna is 50% of that captured. The other 50%
is lost in the antenna`s source impedance (its radiation resistance). In
other words, it is re-radiated.

Mutual impedance does not trap energy on or in a conductor or limit
excitation of multiple conductors.

Necessity is said to be the mother of invention. Identify the greatest
needs and you may forecast some invention.

Best regards, Richard Harrison, KB5WZI