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True-time-delay system for SAMB amplitude and phase control... 11 5 SAMB beam-position shift with frequency using matrix... 12 6-8 Measured radiation patterns for SAMB true-time-delay antenna... 13,14 9-23 Typical SAMB matrix array patterns for various beam positions. ..15-22 24 SAMB matrix array patterns, 45°sector coverage, f ... 22 25 SAMB time-delay array patterns, 45°sector coverage, f ... 23 26-44 SAMB time-delay patterns, various beam positions and frequencies... 24-33 45 CARAMBA I system schematic... 37 46 CARAMBA I radiation patterns at three frequencies... 39,40 47 54-61 Computed azimuth patterns, various e o opt and 9 ... 50,51 62 Azimuth half-power beamwidth vs elevation angle, various values of 9 opt ...52

Present requirements for wide-band spread-spectrum techniques for many applications offer attractive potential uses for circular symmetric arrays. Since rigorous analytical techniques are not available to investigate conical array characteristics, experimental techniques can be used to simulate scanning of the conical array.This paper describes techniques that give some insight into the behavior of conical arrays of dipoles. A projected distribution is used to simulate array properties such as beamwidth, sidelobe level, and polarization. Comparisons with a similar cylindrical array are made. Element patterns are examined to determine if behavior is similarto known behavior of element patterns for the cylindrical array. Finally, a conical sector experimental array is used to simulate selected "scanned" beam positions to determine array behavior,i.e., beamwidth, scan limits, polarization, and sidelobe level. Experimental and calculated array patterns, element patterns, and polarization data are given.

This communication presents a modal approach for investigating mutual coupling on a cylindrical array of waveguide elements. Computed results are given in the form of element patterns and are compared with measured patterns.

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