Accession Number : AD0621555

Title :   ADVANCED ANTENNA TECHNIQUES.

Descriptive Note : Scientific rept. no. 1, 26 Oct 64-26 Jun 65,

Corporate Author : PHILCO CORP BLUE BELL PA ADVANCED TECHNOLOGY CENTER

Personal Author(s) : Procopio,Leo W. ; Kashihara,Thomas K. ; Czorpita,Stephen

Report Date : JUL 1965

Pagination or Media Count : 103

Abstract : The results of preliminary investigations into antenna techniques which employ the angular dispersion-compression principle are presented. The report includes a description of various processing schemes, including detailed discussion of the cylindrical disc array, and a study of the general synthesis problem for ambiguity functions. In the latter study, the use of pseudo-random illumination functions is analyzed as a means for achieving dispersed patterns and good pattern correlation properties. The report also presents additional studies in superdirectivity and angular resolution. The problem of synthesizing a superdirective illumination function for a plane, circular aperture is presented and is shown to be closely approximated by the field distribution of a circular confocal cavity. The resolution constants associated with angle rate, and combined angle-angle rate are derived; resolution in angle-rate is found to depend only on the spatial spread of the pattern, while resolution in combined angle-angle rate is found to be a constant, indicating a fundamental tradeoff between resolution in angle and that in angle rate. Finally, the six dimensional resolution constant, containing the parameters range, azimuth, elevation, and their respective rates of change, is discussed. It is shown that for a particular set of assumptions regarding antenna processing, the six dimensional resolution hyperspace is a constant. (Author)

Descriptors :   (*ANTENNAS, THEORY), ANTENNA RADIATION PATTERNS, STATISTICAL FUNCTIONS, CORRELATION TECHNIQUES, SYNTHESIS, PHASED ARRAYS, RESOLUTION, DIPOLE ANTENNAS, PHASE SHIFT CIRCUITS

Distribution Statement : APPROVED FOR PUBLIC RELEASE