AN INVESTIGATION OF SOME PROBLEMS ASSOCIATED WITH PHASE SCANNED ARRAYS
BOEING CO RENTON WASH
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Research is presented on electromechanicallyscanned UHF arrays. Improved means of pattern synthesis, element arrangement, phase shifting and power division were studied and both theoretical an experimental results are presented. Specific topics include 1 a triangular arrangement of the radiating elements in an rray used to reduce mutual coupling 2 a new technique for synthesizing patterns of arrays 3 a fakirs-bed of monopoles on a ground screen with t e beam step-scanned in azimuth 4 the use of lunar line, a new circularly-septate waveguide 5 the use of elastic prisms for swinging the beam from a line source 6 a novel application of directional couplers for generating smooth, linear, reflectionless phase shifts and 7 a novel use of a radial transmission line to achieve very low output impedance .A -283 4059N An investiga ion of some problems associated with phase-scanned arrays. Triangular element distributions. non-linear programming approach to pattern synthesis for arrays on circular arcs. A 36 degree steerable beam array. T-septate lunar line UHF slot array. Scanning a line source fixed in space. Directional-coupler phase-shifter for array scanning.