Two-Element Quadrifilar Array,
Abstract
Several quadrifilar helices were built and tested, and a three-quarter-turn, quadrifilar helix was selected for use in a two-element vertical array as a fixed satellite ground antenna. A vertical array of two of the helices was then designed and tested. The pattern provided hemisphere coverage and has a fairly sharp cutoff at the horizon to reduce multipath effects. Impedance measurements, polar patterns, and radiation distribution plots of axial ratio, tilt angle, and polarization loss further verify that this antenna is applicable to satellite tracking. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 08, 1974
- Accession Number
- AD0776542
Entities
People
- Frederick R. Domer
Organizations
- United States Naval Research Laboratory