Methods for noise reduction in far-field patterns obtained from cylindrical near-field antenna measurements

Cano Facila, Francisco Jose and Sierra Castañer, Manuel (2012). Methods for noise reduction in far-field patterns obtained from cylindrical near-field antenna measurements. "IEEE Transactions on Antennas And Propagation", v. 60 (n. 12); pp. 5635-5644. ISSN 0018-926X. https://doi.org/10.1109/TAP.2012.2208613.

Description

Title: Methods for noise reduction in far-field patterns obtained from cylindrical near-field antenna measurements
Author/s:
  • Cano Facila, Francisco Jose
  • Sierra Castañer, Manuel
Item Type: Article
Título de Revista/Publicación: IEEE Transactions on Antennas And Propagation
Date: December 2012
ISSN: 0018-926X
Volume: 60
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Señales, Sistemas y Radiocomunicaciones
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Two different methods to reduce the noise power in the far-field pattern of an antenna as measured in cylindrical near-field (CNF) are proposed. Both methods are based on the same principle: the data recorded in the CNF measurement, assumed to be corrupted by white Gaussian and space-stationary noise, are transformed into a new domain where it is possible to filter out a portion of noise. Those filtered data are then used to calculate a far-field pattern with less noise power than that one obtained from the measured data without applying any filtering. Statistical analyses are carried out to deduce the expressions of the signal-to-noise ratio improvement achieved with each method. Although the idea of the two alternatives is the same, there are important differences between them. The first one applies a modal filtering, requires an oversampling and improves the far-field pattern in all directions. The second method employs a spatial filtering on the antenna plane, does not require oversampling and the far-field pattern is only improved in the forward hemisphere. Several examples are presented using both simulated and measured near-field data to verify the effectiveness of the methods.

More information

Item ID: 16259
DC Identifier: http://oa.upm.es/16259/
OAI Identifier: oai:oa.upm.es:16259
DOI: 10.1109/TAP.2012.2208613
Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6239568
Deposited by: Memoria Investigacion
Deposited on: 09 Jul 2013 17:57
Last Modified: 21 Apr 2016 16:34
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