ADVANCED ANTENNA TECHNIQUES.
Final rept. for 1 Dec 62-31 Mar 64,
PHILCO CORP BLUE BELL PA
Pagination or Media Count:
A generalized theory of resolution for array antennas was formulated. The theory indicates that angular resolution is determined by the width of the autocorrelation function of the field pattern, and not by the width of the pattern itself. Hence a well defined main beam is not a prerequisite for achieving angular resolution even noiselike beams can be characterized by an autocorrelation function of narrow width. It is shown that this basic principle leads to the concept of angular dispersion and compression, a phenomenon for angular beam patterns akin to dispersion and compression of radar pulses. During the course of the study new procedures were formulated for synthesizing antennas of given resolution properties. The resolution theory was applied to antennas with time-invariant and time-varying illumination functions, and was used to reexamine in some detail the classical theories of superdirectivity. In addition to an exposition of angular resolution theory, preliminary concepts for achieving angular dispersion and compression, and superdirectivity were also investigated. It is shown that angular dispersion-compression techniques may give rise to significant simplifications in present phased array designs. Author