Theoretical performance of wide-band interferometers

An interferometer antenna is one of several techniques by which it is possible to realize a large aperture economically. It has been known for many years that the far field interferometer antenna pattern contains many grating lobes when the antenna is energized by a CW signal. However, for wideband signals of finite duration, the antenna pattern is considerably altered. In the present paper, an interferometer multidimensional ambiguity function is defined to determine performance limitations on an interferometer radar with respect to target range R, range rate R, angle, and angle rate.