Strong magnetic fields near a leaky wave aperture in a lossy medium

The concept that a leaky wave, in a lossy medium, will grow in amplitude in the direction of phase propagation is examined for a finite aperture source. It is shown that local growth is indeed possible if the traveling wave excitation is suitably chosen. Specific calculated results are shown for the magnetic field in a lossy half-space adjacent to the aperture. Enhancements on the order of 20 dB are possible over what one would expect on the basis of classical skin depth theory