The determination of refractive indices of dynamic gaseous media by a scanning grid (Dissertation)
Klein, Martin Leroy
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In this paper we are concerned with the possibility of improving the field strength of a radiated electromagnetic disturbance. The disturbance is propagated by an antenna of short length which is excited by a signal of purely arbitrary wave form. In an effort to improve the distribution in space of the radiated signal, a secondary re-radiating antenna is introduced into the field of the primary short antennae.This secondary antenna is of special design. Use is made of Fresnel's zone plate from the physical optics.
Thesis (Ph.D.)--Boston University