Accession Number : ADD015019

Title :   Broadband Quadrifilar Phased Array Helix.

Descriptive Note : Patent Application, Filed 17 Oct 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Josypenho, Michael

Report Date : 17 Oct 1990

Pagination or Media Count : 19

Abstract : A broadband quadrifilar phased array helix antenna is comprised of a pair of bifilar arrays spaced 90 deg on a coaxial fiberglass tube. A 90 deg feed phase exists between the bifilar arrays. Each bifilar array has three elements with the longest element having approximately twice the length of the shortest element and all three elements being of a length to give good broadband coverage over a specified range with specified shaped patterns being required. A 180 deg feed phase exists between adjacent elements. A number of trimming adjustments to the design of the antenna are presented for obtaining improved performance. (Author)

Descriptors :   ARRAYS, BROADBAND, COAXIAL CONFIGURATIONS, FIBERGLASS, FILAMENT WOUND CONSTRUCTION, PATTERNS, SHAPE, TUBES

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE