Novel method to improve the signal-to-noise ratio in the far-field results obtained from planar near-field measurements

Cano Facila, Francisco Jose and Burgos Martínez, Sara and Sierra Castañer, Manuel (2011). Novel method to improve the signal-to-noise ratio in the far-field results obtained from planar near-field measurements. "IEEE antennas & propagation magazine", v. 53 (n. 2); pp. 215-220. ISSN 1045-9243.

Description

Title: Novel method to improve the signal-to-noise ratio in the far-field results obtained from planar near-field measurements
Author/s:
  • Cano Facila, Francisco Jose
  • Burgos Martínez, Sara
  • Sierra Castañer, Manuel
Item Type: Article
Título de Revista/Publicación: IEEE antennas & propagation magazine
Date: April 2011
Volume: 53
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

A method to reduce the noise power in far-field pattern without modifying the desired signal is proposed. Therefore, an important signal-to-noise ratio improvement may be achieved. The method is used when the antenna measurement is performed in planar near-field, where the recorded data are assumed to be corrupted with white Gaussian and space-stationary noise, because of the receiver additive noise. Back-propagating the measured field from the scan plane to the antenna under test (AUT) plane, the noise remains white Gaussian and space-stationary, whereas the desired field is theoretically concentrated in the aperture antenna. Thanks to this fact, a spatial filtering may be applied, cancelling the field which is located out of the AUT dimensions and which is only composed by noise. Next, a planar field to far-field transformation is carried out, achieving a great improvement compared to the pattern obtained directly from the measurement. To verify the effectiveness of the method, two examples will be presented using both simulated and measured near-field data.

More information

Item ID: 10800
DC Identifier: http://oa.upm.es/10800/
OAI Identifier: oai:oa.upm.es:10800
Official URL: http://ieeeexplore.com/xpl/freeabs_all.jsp?reload=true&arnumber=5949371
Deposited by: Memoria Investigacion
Deposited on: 07 May 2012 11:06
Last Modified: 20 Apr 2016 19:01
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