Integrated Conformal Arrays
Final rept. Mar 1970-Jan 1971
NAVAL AIR SYSTEMS COMMAND WASHINGTON DC
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Two distinct aspects were investigated. The first one is concerned with the synthesis of far field patterns from sources on the conical surface. Three different approaches were undertaken 1 An equivalence principle was used to determine the distribution of sources on a cone to produce a prescribed pattern in the far field. 2 Roots of two transcendental equations were calculated for appropriate parameters. The numerical values are needed for a theoretical solution of the radiation fields and mutual coupling effects in a region bounded by a conducting cone. 3 Computation of patterns from discrete radiators placed on a conical surface was continued. The signal-to-noise ratio is optimized in the beam pointing direction. The second aspect included the design, fabrication and testing the scanning capabilities of a linear array of crossed slots on a large ground plane. The array was designed so that each radiating element could be matched in the presence of the others, its phase and amplitude could be arbitrarily set and the active impedance measured. The array scanned from broadside to 80 degrees 10 degrees from endfire with satisfactory beam patterns and sidelobe levels.
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