Wisconsin Test Facility Transmitting Antenna Pattern and Steering Measurements.
NAVAL UNDERWATER SYSTEMS CENTER NEWPORT R I
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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
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation