Accession Number : AD0623146

Title :   A FOUR SIDED ARRAY OF ONE TURN HELICAL ANTENNAS AND THE EFFECTS OF GROUND PLANES.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Diller,Wesley Thomas ; Barton,John Benny

Report Date : AUG 1965

Pagination or Media Count : 103

Abstract : The purpose is to develop an array, of 4 one turn helices, that gives circular polarization, omnidirectional coverage, and maximum power at 18 degrees above a ground plane. Free space radiation and terminal impedance are compared for several helices and parameter changes. Radiation is measured above a conducting plane, absorbent material and wire grids. Free space radiation from the array of center lead helices has omni-directional coverage and circular polarization within 4db. The radiation from the array above a wire grid is aligned near 18 degrees, has omni-directional coverage and circular polarization within 10db. (Author)

Descriptors :   (*HELICAL ANTENNAS, SPACE COMMUNICATIONS), (*SPACE COMMUNICATIONS, HELICAL ANTENNAS), (*AIRCRAFT ANTENNAS, HELICAL ANTENNAS), (*OMNIDIRECTIONAL ANTENNAS, HELICAL ANTENNAS), ANTENNA RADIATION PATTERNS, POLARIZATION, ELECTRICAL IMPEDANCE, COMMUNICATION AND RADIO SYSTEMS, ELECTRICAL ENGINEERING, RADIO WAVES, PROPAGATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE