Nulling a symmetric pattern location with phase-only weight control
نویسندگان
چکیده
منابع مشابه
Phase-Only Adaptive Nulling with a Genetic Algorithm
This paper describes a new approach to adaptive phase-only nulling with phased arrays. A genetic algorithm adjusts some of the least significant bits of the beam steering phase shifters in order to minimize the total output power. Using a few bits for nulling speeds convergence of the algorithm and limits pattern distortions. Various results are presented to show the advantages and limitations ...
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A simple method of nulling broadband light is presented. A mirror-symmetric pair of right-angle periscopes is first used to introduce a geometric field flip between two incident light beams, after which the light is combined by means of one of a number of constructive two-beam interferometers. A reciprocal pair of beam-splitter passages provides for complete symmetry. Such an approach greatly e...
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We discuss the theory of the Bracewell nulling interferometer and explicitly demonstrate that the phase of the ‘‘white light’’ null fringe is the same as the phase of the bright output from an ordinary stellar interferometer. As a consequence, a ‘‘closure phase’’ exists for a nulling interferometer with three or more telescopes. We calculate the phase offset as a function of baseline length for...
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ژورنال
عنوان ژورنال: IEEE Transactions on Antennas and Propagation
سال: 1984
ISSN: 0096-1973
DOI: 10.1109/tap.1984.1143360