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Title: A Spatial-frequency Method for Analyzing Antenna-to-Probe Interactions in Near-field Antenna Measurements

Abstract

The measurement of the radiation characteristics of an antenna on a near-field range requires that the antenna under test be located very close to the near-field probe. Although the direct coupling is utilized for characterizing the near field, this close proximity also presents the opportunity for significant undesired interactions (for example, reflections) to occur between the antenna and the near-field probe. When uncompensated, these additional interactions will introduce error into the measurement, increasing the uncertainty in the final gain pattern obtained through the near-field-to-far-field transformation. Quantifying this gain-uncertainty contribution requires quantifying the various additional interactions. A method incorporating spatial-frequency analysis is described which allows the dominant interaction contributions to be easily identified and quantified. In addition to identifying the additional antenna-to-probe interactions, the method also allows identification and quantification of interactions with other nearby objects within the measurement room. Because the method is a spatial-frequency method, wide-bandwidth data is not required, and it can be applied even when data is available at only a single temporal frequency. This feature ensures that the method can be applied to narrow-band antennas, where a similar time-domain analysis would not be possible.

Authors:
 [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Security (NA-70)
OSTI Identifier:
1432919
Report Number(s):
SAND-2015-9144
662053
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Brock, Billy C. A Spatial-frequency Method for Analyzing Antenna-to-Probe Interactions in Near-field Antenna Measurements. United States: N. p., 2015. Web. doi:10.2172/1432919.
Brock, Billy C. A Spatial-frequency Method for Analyzing Antenna-to-Probe Interactions in Near-field Antenna Measurements. United States. doi:10.2172/1432919.
Brock, Billy C. Thu . "A Spatial-frequency Method for Analyzing Antenna-to-Probe Interactions in Near-field Antenna Measurements". United States. doi:10.2172/1432919. https://www.osti.gov/servlets/purl/1432919.
@article{osti_1432919,
title = {A Spatial-frequency Method for Analyzing Antenna-to-Probe Interactions in Near-field Antenna Measurements},
author = {Brock, Billy C.},
abstractNote = {The measurement of the radiation characteristics of an antenna on a near-field range requires that the antenna under test be located very close to the near-field probe. Although the direct coupling is utilized for characterizing the near field, this close proximity also presents the opportunity for significant undesired interactions (for example, reflections) to occur between the antenna and the near-field probe. When uncompensated, these additional interactions will introduce error into the measurement, increasing the uncertainty in the final gain pattern obtained through the near-field-to-far-field transformation. Quantifying this gain-uncertainty contribution requires quantifying the various additional interactions. A method incorporating spatial-frequency analysis is described which allows the dominant interaction contributions to be easily identified and quantified. In addition to identifying the additional antenna-to-probe interactions, the method also allows identification and quantification of interactions with other nearby objects within the measurement room. Because the method is a spatial-frequency method, wide-bandwidth data is not required, and it can be applied even when data is available at only a single temporal frequency. This feature ensures that the method can be applied to narrow-band antennas, where a similar time-domain analysis would not be possible.},
doi = {10.2172/1432919},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {10}
}

Technical Report:

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