Overview of an image-based technique for predicting far-field radar cross section from near-field measurements

LaHaie, Ivan J.

doi:10.1109/map.2003.1282192

Cited by 82 publications

(31 citation statements)

References 5 publications

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“…This conclusion is in accordance with the fact, that a rigorous transformation from near field backscattering data into far field data requires an elaborate full set of bistatic measurements to be performed [2]. However, under certain conditions and for the purpose of certain applications the deviation between the RDs for the measurement space and the operational parameter space can be neglected, leading to the approximate assumption of an "universal reflectivity distribution".…”

Section: Measurement Space and Operational Parameter Space Rd-approxsupporting

confidence: 73%

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3-D characterization of radar targets by means of ISAR/SAR near field imaging techniques

John¹,

Aulenbacher

Inaebnit³

2007

SPIE Proceedings

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Inverse synthetic aperture radar (ISAR) imaging techniques based on indoor near field backscattering measurements turns out to be a powerful tool for diagnostic purposes in radar cross-section (RCS) reduction and for deriving RCS target models, viable for radar systems operating at larger distances, e.g. under far field conditions. This paper presents an advanced 3-D imaging approach, where in addition to the turntable rotation the antenna is moved along a linear path chosen in accordance with the geometry of the target and the aspect angle of interest. For reconstructing the reflectivity distribution a configuration-specific grid of spatial sampling points is employed which reduces the complexity of determining correct values for the scattering amplitudes. The reflectivity distribution reproduces the backscattering seen from an antenna moved along a finite surface (synthetic 2-D-aperture) in the scattering near field of the target, but is to be used to model backscattering for antennas at larger distances, e.g. in the far field. Therefore, the feasibility of this approach is discussed with respect to different applications, i.e. for the diagnostic of RCS reduction and for deterministic or statistical RCS models. Results obtained for a car as X-band radar target are presented in order to verify the features of the imaging system.

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Section: Measurement Space and Operational Parameter Space Rd-approxsupporting

confidence: 73%

“…Backscattering measurements with rotated turntable, but fixed antenna position lead to the well-known 2-D inverse synthetic aperture radar (ISAR) imaging (see e.g. [1,2] for 2-D-imaging in far-and near field). Since two-dimensional projections of three-dimensional scattering center distributions are in case of complex targets (as e.g.…”

Section: Introductionmentioning

confidence: 99%

3-D characterization of radar targets by means of ISAR/SAR near field imaging techniques

John¹,

Aulenbacher

Inaebnit³

2007

SPIE Proceedings

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“…One is the traditional SAR processing [13][14][15]: the SAR image at every frequency is formed using the scattered field information. To combine the SAR images at every frequency, each one is multiplied by the conjugate of the incident field of the array (which also changes with frequency), then all the contributions are added [2,23].…”

Section: Description Of the Methodsmentioning

confidence: 99%

Frequency Scanning Based Radar System

Álvarez-López¹,

García-González²,

Vázquez³

et al. 2012

PIER

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Abstract-A novel imaging technique based on a frequency scanning antenna array is presented. The method is conceived to provide angular information in range-based radar systems which do not allow mechanical or electronic beam steering. The beam steering is changed with frequency, which requires a novel scattered field data processing scheme/algorithm to recover the SAR image.System features, advantages and limitations are discussed, presenting simulation and measurement results, which show the system capabilities to resolve the range and angular position of the objects.

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“…However, an outside test field site or a compact range system is very expensive. In order to overcome this problem, a variety of near-field test method to extrapolate RCS came into being [3][4][5][6][7][8][9][10][11][12][13]. In this overview, two categories are summed up from the existing extrapolating techniques, the one is based on Huygens Equivalent Reradiating Source (HERS), and the other is based on inverse synthetic aperture imaging (ISAI).…”

Section: Introductionmentioning

confidence: 99%

“…In general, the extrapolation of far field RCS from near field data requires a full set of bistatic scattering measurements. La Haie developed a new near field-to-far field transformations (NFFFT) for predicting the far-field RCS of targets from monostatic nearfield measurements [5,6]. His techniques use approximations and/or supporting information to overcome the need for bistatic near-field measurement [7,8].…”

Section: Introductionmentioning

confidence: 99%

Overview of RCS Extrapolation Techniques to Aircraft Targets

Li¹,

Hu²,

Zhang³

et al. 2008

PIER B

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Abstract-In order to meet the approximate plane-wave irradiation condition, adequate large field or compact range system is needed for RCS measurement of large aircraft targets. However, an outside testing field site or a compact range system is very expensive, so some kinds of RCS extrapolation methods based on near-distance testing have been presented. In this overview, two categories of extrapolating technique are summed up, which are based on Huygens Equivalent Reradiating Source (HERS) and Inverse Synthetic Aperture Imaging (ISAI) respectively. Each method is fully elaborated. The comparison and analysis of these extrapolating techniques are discussed in detail.

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Overview of an image-based technique for predicting far-field radar cross section from near-field measurements

Cited by 82 publications

References 5 publications

3-D characterization of radar targets by means of ISAR/SAR near field imaging techniques

3-D characterization of radar targets by means of ISAR/SAR near field imaging techniques

Frequency Scanning Based Radar System

Overview of RCS Extrapolation Techniques to Aircraft Targets

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