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NAVAL RESEARCH LAB WASHINGTON DC
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This report considers impulse radar signals in terms of their propagation from an array of elements. The far-field electric vector is proportional to the derivative of the current in an infinitesimal dipole representing each element. Although not physically realizable, this model is used as an approximation to illustrate some array properties peculiar to impulse, or ultra-wideband UWB, excitations. Thus, for example, a 1-ns rounded baseband pulse with a cosine-squared shape theoretically propagates as a single sinusoidal cycle centered at L-band 1 GHz with 100 bandwidth. The far field from an array of elements is considered as a function of angle.
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