Accession Number : ADA118611

Title :   Sidelobe Modulation in Far-Field Radiation Patterns.

Descriptive Note : Final technical rept. Jun 81-Jun 82,


Personal Author(s) : Moriarty,Gene

PDF Url : ADA118611

Report Date : 01 Jun 1982

Pagination or Media Count : 28

Abstract : In this research, the following problem is addressed: How can low sidelobes in the distant electric field or power pattern be achieved via time-modulation of the element values in a linear phased array? Time-modulation of the N array element values can result in far-field patterns whose sidelobes are severely modulated. This procedure can produce sidelobes which on the average are very low. In this research, ON/OFF switchings are programmed in a predetermined sequence to produce a specified far-field pattern with equal and ultra-low sidelobe levels. In addition, the mainbeam of the far-field pattern is kept fairly fixed. A FORTRAN program is developed to produce ON and OFF times for this modulation scheme, given a specific value of array length (N) and a desired sidelobe level (PK).

Descriptors :   *Sidelobes, *Phased arrays, *Linear arrays, *Amplitude modulation, Far field, Scheduling, Computer programs, Patterns, Power levels, Arrays, Power, Modulation, Radiation patterns, Value, Low level, Fortran, Length

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE