System and method for efficiently generating electromagnetic waves with reduced velocities

A system for efficiently generating or originating a tailored electromagnetic (EM) wave having a lower velocity than the speed of electromagnetic waves in free space, comprising:

• a coaxial waveguide which extends linearly;
• and
• a sinewave current generator, wherein
• the coaxial waveguide includes a tubular outer body formed of a second conductive material and defines a space, and an internal conductor disposed coaxially within the space of the tubular outer body and is formed of a first conductive material which is more conductive than the second conductive material,
• the tubular outer body functions as a tailored emitting antenna and is constructed physically and electrically by at least three phase-shifted sub-antennas connected in series, and
• the sinewave current generator generates multiple phase-shifted sinewave currents which are respectively input to the sub-antennas.

A system for efficiently generating or originating a tailored electromagnetic (EM) wave having a lower velocity than the speed of electromagnetic waves in free space, comprising:

• a coaxial waveguide which extends linearly;
• a tailored emitting antenna which is constructed physically and electrically by at least three phase-shifted sub-antennas connected in series;
• and
• a sinewave current generator which generates multiple phase-shifted sinewave currents which are respectively input to the sub-antennas, wherein
• each of the sub-antennas produces a section of the tailored EM wave inside the waveguide.