Memorias de investigación
Ponencias en congresos:
Time and Spatial Filtering for Echo Reduction in Antenna Measurements
Año:2015
Áreas de investigación
  • Ingenierías,
  • Tecnología electrónica y de las comunicaciones
Datos
Descripción
During the last years, new algorithms, based on time filtering, spatial or modal filtering, have been designed for echo reduction techniques applied to antenna measurements. These algorithms have been used for different applications where the effect of the echoes is important, as far field system, VHF or UHF applications, automotive systems, small antennas, etc. The authors, in previous papers, have analysed the effect of different algorithms: time filtering (fft, non uniform dft or matrix pencial), modal filtering based on Spherical modes (MV-Echo) and spatial filtering based on Integral Equations (Insight) and holographic techniques (fft and dft) to cancel the effect of the reflections. This comparison has been applied to the measurements of a dipole antenna (SD1900) using a StarLab system. It is observed that each of the algorithms is better for different situations, depending on the source of the echo. For instance, time filtering techniques are good for reflections coming from different distances with respect the direct ray, but not so good for close reflections. In addition hey need a large frequency band to work properly. Spatial algorithms can correct the effect of positioners or other structures close to the antenna under test, but they are better for planar near field acquisitions and worse for classical single probe spherical near field where the antenna is rotated and probe is fixed (e.g. roll-over-azimuths systems). Moreover, they require extra information of the AUT geometry. This paper presents first a comparison of each algorithm and then, a combination of time and spatial techniques based on uniform or non-uniform DFT to take advantage of the benefits of each algorithm for different origins of the reflections.
Internacional
Si
Nombre congreso
Antenna Measurement Techniques Association 2015 (AMTA)
Tipo de participación
960
Lugar del congreso
Long Beach, California, USA
Revisores
Si
ISBN o ISSN
2380-1840
DOI
Fecha inicio congreso
11/10/2015
Fecha fin congreso
16/10/2015
Desde la página
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Hasta la página
5
Título de las actas
Proceedings of the Antenna Measurement Techniques Association
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Manuel Sierra Castañer UPM
  • Autor: M.Pilar Gonzalez Blanco Garcia UPM
  • Autor: Manuel José López Morales UPM
  • Autor: F Saccardi Microwave Vision Italy (MVI)
  • Autor: Lars Foged Microwave Vision Italy (MVI)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de Radiación
  • Departamento: Señales, Sistemas y Radiocomunicaciones