Accession Number : AD0164926
Title : Simultaneous Sum and Difference Pattern Technique for Circular Array Antennas.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Boyns,Jerry E.
Report Date : 24 APR 1973
Pagination or Media Count : 6
Abstract : The patent describes an apparatus for obtaining simultaneous sum and difference patterns with a circular-array antenna fed by an R-2R parallel-plate lens systems. The apparatus comprises sum and difference circuits which in combination with switching circuitry can provide a plurality of different combinations of amplitude taper to a multiple input/output port lens system to achieve 360 degrees scan from an array antenna fed thereby. A sum power divider and a difference power divider are connected directly and through 180 degrees hybrid couplers respectively, to one side of a DPDT, amplitude pass-around switch to provide selectively predetermined combinations of the outputs of the two power dividers. The resulting combinations are fed to the ports of the lens system in a conventional manner. The sum pattern is used for transmission, and both the sum and difference patterns are used on reception.
Descriptors : *Antenna arrays, *Patents, Circular antennas, Antenna radiation patterns, Multiple beam antennas
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE