A STUDY TECHNIQUE TO PRODUCE A HIGH FREQUENCY LAND BASED DIRECTION FINDER UTILIZING TRAVELING WAVE BEVERAGE ANTENNAS IN THE AIR-EARTH INTERFACE.
Abstract
A bearing accuracy test on the 112 meter cicular array of Beverage antennas with 2-degree element spacing has been initiated. About 300 of proposed 1000 useful bearings have been obtained to date. A standard deviation significantly less than that reported in 1961 for the same site with 10-degree element spacing is already apparent. The theoretical study of the Beverage antenna(s) supported in part by an experimental program is continuing. A comprehensive pattern study for various electrical and mechanical parameters has shown that simple summation of signals from adjacent antennas will cause a significant reduction in the beamwidth and the polarization error, while providing an increase in the system sensitivity. Measurements of the wave tilt angle for ground wave propagation have been completed. In general, the results support the choice of constants used in the theoretical study. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 23, 1963
- Accession Number
- AD0426354
Entities
People
- Douglas N. Travers
- Paul E. Martin
Organizations
- Southwest Research Institute