FEASIBILITY STUDY FOR A TACTICAL LORAN-D ANTENNA
Final rept. 29 Nov 1965-Sep 1966
COLLINS RADIO CO RICHARDSON TX ANTENNA DIV
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The feasibility of a lightweight, tactical, LORAN D Antenna system is examined in this study. The existing system is used as a basis for comparison to achieve either an improved electrical performance utilizing the present mechanical characteristics, or retaining the present systems electrical parameters and achieving superior tactical and mechanical properties. The program was accomplished by evaluating efficiency-bandwidth products for a variety of electrical configurations while a concurrent mechanical study was being made involving various structural designs, materials, and methods. Finally, the findings of the electrical and mechanical studies were combined, resulting in four recommended possible approaches. The antenna recommended as a result of this study is a basic umbrella configuration. The support structure recommended is an optimized version of the snap-out tower presently employed. Optimization of the tower involved increased guy diameters to provide linear tower displacement, increasing the leg wall thickness from 0.095 to 0.125 inch, and decreasing the horizontal tower member spacing to 30 inches from 36 inches. The specified erection time of 10 men - 8 hours for antenna installations was judged feasible due to past performance of the existing system. The system weight using one of the recommended configurations is estimated to be between 5500 to 6500 pounds.
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