Extraction of radio frequency from electromagnetic surface waves guided by metallic strips

Pulses of rf radiation with power in the megawatt range was extracted from electromagnetic surface waves. These nonradiating waves propagated on a long and thin metallic strip with most of the wave energy confined to a distance of less than a half wavelength around the strip. The electromagnetic energy of the surface waves was first extracted into rectangular waveguides in a TE01 mode and then radiated into the atmosphere with an overall efficiency of 90%. [S0034-6748(00)00802-9].