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- W2099357788 abstract "Problem of determination of antenna pattern by computer processing of near field measurements is considered. The method of minimum extension is developed for cases of extrapolation of data of near-field measurements. Optimal values of work parameters of generalized functional of extension are found. Results of numeric simulation are presented for onedimensional structure. 1. hVTRODUCllON Perspective methods of determination of the antenna patterns are based on computer processing of antenna measurements in far or near-field regions (I)-(5). If the surface, on which the.measurements are carried out, is plane, in absence of measuring noise the accuracy result can be obtained only for unlimited area of measurements. In practice the area of measurements is always limited. In this case it is necessary either to select sizes of measurements area with a large reserve or to reconcile to additional errors connected with extrapolation by zeros of a near field outside the area of measurements. Alternative method to extrapolation by zeros is the extrapolation based on properties of an analyticity of a near field (5). This analyticity is caused by a finiteness of area of current distribution that forms a field of radiation (both near and far). If the area of distribution of currents would be known exactly, the application of the prolate spheroidal wavefunctions would allow one to restore the distribution of currents by the measured part of a near field, and the antenna pattern could be obtained by Fourier transform of current distribution. Unfortunately the area of distribution of currents can be known only approximately. Without any additional a priori information this inverse problem of restoring the current distribution by the measured part of a near field is ill-posed, and the application of traditional methods of regularization has shown their insufficient efficiency. Under these conditions the application of a method of a minimum extension (MME) (6) is perspective to processing near-field antenna measurements." @default.
- W2099357788 created "2016-06-24" @default.
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- W2099357788 date "2005-04-01" @default.
- W2099357788 modified "2023-09-25" @default.
- W2099357788 title "Using the method of minimum extension to extrapolation of antenna measurements" @default.
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- W2099357788 doi "https://doi.org/10.1109/mmet.2004.1396962" @default.
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