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- W2055324669 abstract "By comparing the radiated energy densities in the Fresnel’s region due to excitations by a cw (continuous wave) sin ω0t and a single-cycle sin ω0t, it is shown that the single-cycle pulse is more efficient in collimating (or focusing) the energy in the vicinity of the disk axis. We have also considered a single-cycle cos ω0t pulse as an exciting source, which may be more academic than realistic. Nonetheless, the results shed some light in showing clearly that the shorter the rise time of a pulse, the slower is the decay of the radiated energy, and hence, it is highly efficient in focusing the energy in front of the radiating device. It follows then that whenever the transmission of a collimated beam of energy to a large distance along the axis of the radiating aperture is desired, it can be accomplished more efficiently by using a short pulse, instead of a cw source." @default.
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- W2055324669 date "1993-09-01" @default.
- W2055324669 modified "2023-10-16" @default.
- W2055324669 title "Behavior of the energy density in the Fresnel region of a conducting circular disk excited by single‐cycle sinusoids" @default.
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- W2055324669 doi "https://doi.org/10.1063/1.354617" @default.
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