Accession Number : AD0758648

Title :   Wisconsin Test Facility Transmitting Antenna Pattern and Steering Measurements.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL UNDERWATER SYSTEMS CENTER NEWPORT R I

Personal Author(s) : Bannister,Peter R. ; Williams,Frederick J. ; Dahlvig ,Alan L. ; Kraimer,William A.

Report Date : 13 MAR 1973

Pagination or Media Count : 51

Abstract : During August-September 1971 the Naval Underwater Systems Center (NUSC) performed pattern and steering measurements on the NS and EW antennas of the Wisconsin Test Facility (WTF). The pattern measurements were made at 13 different locations in eastern Minnesota and southern Wisconsin (covering approximately 120 degrees of arc); the farfield steering measurements were made in Mars Hill, Maine, and Swansboro, North Carolina. In order to ensure that the receiving sites were acceptable, approximately six components of the received magnetic field were measured at each site and then plotted on a normalized cosine curve. The 45- and 75-Hz pattern measurements were made at a range of approximately 300 km; for the steering measurements the range was 1.7 Mm. It was learned from the pattern and steering measurements that (1) the WTF EW antenna pattern is skewed clockwise, (2) the WTF NS antenna pattern is skewed counterclockwise, and (3) the effective conductivity under the WTF EW antenna is greater than that under the WTF NS antenna. (Author)

Descriptors :   (*ANTENNA RADIATION PATTERNS, TEST FACILITIES), GAIN, MAGNETIC FIELDS, EXTREMELY LOW FREQUENCY, WISCONSIN, MINNESOTA, MAINE, NORTH CAROLINA

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE