Electromagnetic radiation from sinusoidal currents

Abstract

We study the electromagnetic field radiated by high-frequency electric currents in infinite conducting cylinders, with longitudinal or solenoidal flows. We show that the behavior of the radiated fields is very different for radiofrequencies and for higher frequencies. When ωa/c is large (where a is the cylinder radius), the radiated power varies very rapidly as a function of the frequency and is almost zero for certain values.