Time and spatial filtering for echo reduction in antenna measurements

Sierra Castañer, Manuel; González Blanco, María Pilar; López Morales, Manuel José; Saccardi, Francesco y Foged, Lars Jacob (2015). Time and spatial filtering for echo reduction in antenna measurements. En: "Antenna Measurement Techniques Association (AMTA)", 11/10/2015 - 16/10/2015, Long Beach, California, USA. pp. 1-5.

Descripción

Título: Time and spatial filtering for echo reduction in antenna measurements
Autor/es:
  • Sierra Castañer, Manuel
  • González Blanco, María Pilar
  • López Morales, Manuel José
  • Saccardi, Francesco
  • Foged, Lars Jacob
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Antenna Measurement Techniques Association (AMTA)
Fechas del Evento: 11/10/2015 - 16/10/2015
Lugar del Evento: Long Beach, California, USA
Título del Libro: Antenna Measurement Techniques Association (AMTA)
Fecha: 2015
Materias:
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Señales, Sistemas y Radiocomunicaciones
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaTEC-2011-28789-C02-01SICOMOROSin especificarSin especificar
Comunidad de MadridS2013/ICE-3000SPADERADAR-CMSin especificarSin especificar

Más información

ID de Registro: 42261
Identificador DC: http://oa.upm.es/42261/
Identificador OAI: oai:oa.upm.es:42261
Depositado por: Memoria Investigacion
Depositado el: 23 Jul 2016 11:01
Ultima Modificación: 23 Jul 2016 11:01
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