Ron wrote:
Can someone explain how a transmission line starts radiating as the
separation between the center conductor and ground plane becomes greater
and greater. Assume you out start with a wire over an infinite copper
ground plane that forms a 50 ohm Zo transmission line. Then increase the
distance between the wire and the ground plane until the wire becomes an
end fed antenna. What happens to cause radiation to begin?

Electrons shed excess energy by emitting photons. If those
photons are absorbed by electrons, they don't radiate. If
they are not absorbed, they radiate (at the speed of light).
This is one area where quantum electrodynamics is actually
easier to understand, from a conceptual standpoint, than
Maxwell's equations.
--
73, Cecil http://www.qsl.net/w5dxp



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