Formulación espectral de la radiación en coordenadas cartesianas, cilíndricas y esféricas. Aplicación de la formulación a problemas de diagnostico de antenas, análisis del efecto de radomos y transformación campo próximo campo lejano.Estudio del efecto de errores de medida en campo próximo cilíndrico sobre el diagrama de radiación. Se aplican los desarrollos realizados al diseño, construcción y validación de un campo próximo de medida de antenas en coordenadas cilíndricas. / A unified approach of radiation of sources (antennas) in Cartesian, cylindrical and spherical coordinates is presented. The relationship between model expansions is developed and major characteristics of each modal expansion are discussed.The formulation is applied to the near to far field transformation in cylindrical coordinates and design expressions for the implementation of a cylindrical near-field range are developed. These design expressions allow to specify the measuring system in terms of positioning errors and required signal to noise ratio to achieve a certain degree of accuracy in the far field radiation pattern.Finally, a practical design of a cylindrical near field range operating in S band is presented.