The great value of the theory of thin antennas is substantiated. Models of a linear radiator shaped as a straight perfectly conducting filament with zero and finite radii and as a straight circular thin-wall cylinder are described. Methods of calculation, which were applied before resorting to integral equations, are presented, in particular the induced emf method, its first and second formulations. Results of its application to symmetrical dipoles, to radiators with displaced feed point, to radiators with constant and piecewise constant surface impedance and lumped loads, to folded and multiradiators antenna are given.
Keywords: Antenna theory, Conducting filament, Constant impedance, Current derivative jump, Displaced feed point, First formulation, Folded antenna, Induced emf method, Lumped loads, Modified solution method, Multi-radiators antenna, Oscillating power, Piecewise constant impedance, Poynting’s vector, Reactive power, Second formulation, Sinusoidal distribution, Stepped impedance long line, Surface impedance, Symmetrical dipole, Thin antennas, Thin-wall cylinder.