Art wrote:
"Well Richard I don`t go along with that unless the definition of a wave
is made clear."

We deal with sinusoidal waves because all other shapes can be nade from
combinations of these.

Particle aspects of radiation come to the fore only when radiation
interaxts with matter.

Physics tells us a particle that moves with constant momentum in a
straight line according to Newton`s first law (inertia statement) has
wave motion, according to the "de Broglie hypothesis". Lambda = Planck`s
constant / momentum.

The wave aspect of EM radiation is used as a model to make the
phenomenon intelligible in terms of familiar laws and events of our
everyday, large-scale world.

The 3rd edition of Kraus` "Antennas" says on page 904:
"They (computer program designers) could develop software to simulate
the performance of antennas. In general, these techniques either
numerically solve Maxwell`s equations by descretizing the problem using
integral techniques, such as Moment Methods (MoM) as discussed in
Sec.14-11, or differential technuques, such as finite elements or finite
difference-time domain."

Maxwell gave us everything we need.

Best regards, Richard Harrison, KB5WZI