Bistatic RCS measurements in a compact range

Pienaar, M.; Odendaal, J.W.; Joubert, J.; Pienaar, Ciara; Smit, Jw

doi:10.1109/iceaa.2017.8065484

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…In a previous study, bistatic measurements were conducted on canonical targets at larger fixed bistatic angles viz. β = 45° and β = 90°, [11] and the ability to perform full-polarimetric bistatic RCS measurements in the compact range was investigated [12]. In this paper, measurements conducted on complex PEC targets at β = 30.8° are presented for VV-polarization.…”

Section: Measurement Setupmentioning

confidence: 99%

Bistatic RCS Measurements of Large Targets in a Compact Range

Potgieter

Odendaal²,

Blaauw

et al. 2019

IEEE Trans. Antennas Propagat.

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This paper illustrates the ability to perform bistatic radar cross section (RCS) measurements at a fixed bistatic angle in a compact range. Literature regarding bistatic RCS measurements in compact ranges is limited. The traditional setup of a compact range was adapted to perform bistatic RCS measurements. These bistatic measurements were conducted on canonical and complex realistic scale airframe models. The targets were illuminated with a plane wave created by an offset parabolic dish reflector. The bistatic scattering of the targets were measured by placing a receive antenna at a fixed bistatic angle and finite distance in the compact range. This paper also investigates the effect of the finite separation between the targets and the receiver on the bistatic scattering measurements of large complex targets. The accuracy of the bistatic RCS measurements are compared to full-wave simulations conducted with FEKO using the Multi-Level Fast Multipole Method (MLFMM) solver. Quantitative comparisons are drawn between the simulations and measurements using the Feature Selective Validation (FSV) method.

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Section: Measurement Setupmentioning

confidence: 99%

Bistatic RCS Measurements of Large Targets in a Compact Range

Potgieter

Odendaal²,

Blaauw

et al. 2019

IEEE Trans. Antennas Propagat.

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show abstract

“…The RCS evaluation is usually performed by measuring the scattering parameters in monostatic, quasi-monostatic, or complex bistatic configurations with two antennas often exhibiting a strong mutual coupling, and therefore not suitable for measurements at oblique incidence angles [ 4 ]. In order to overcome these shortcomings, methods for measuring the RCS with a single-antenna setup in anechoic or reverberation chambers were recently developed [ 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

A Single-Antenna Method and Post-Processing Strategy for Radar Cross-Section Measurements at Near-Field Ranges

Mihai

Constantin

Bucuci

et al. 2022

Sensors

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The single-antenna technique proposed in this paper was developed for measuring the radar cross-section at near-field distances in a real environment, from reflection coefficient measurements on the antenna. The near-field radar cross-section is corrected with an analytical factor calculated as a ratio between the radar cross-section computed at far-field and near-field. The analytical correction factor takes into account the effects of the diffraction at the edges of the target at incidence angles higher than 20°. An improved, distance averaging technique is proposed to reduce the multipath propagation effects. A time-gating procedure is additionally used in order to better isolate the reflection from the target and to remove the real environment contributions. The method was successfully tested on a rectangular metallic plate as a target over a wide frequency band, at normal and oblique incidence angles; however, it might also work for arbitrarily shaped targets, because they can actually be divided into small rectangular patches.

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“…This implies that, as the target expands or the frequency increases, the far-field range criterion will become excessively large for practical measurements. Therefore, in many cases, a specially designed reflector is placed between the feeder and OUT to induce far-field conditions [ 1 ]. Another approach is the use of a near-field to far-field transformation (NFFFT) technique in a non-ideal measurement environment.…”

Section: Introductionmentioning

confidence: 99%

Near-Field to Far-Field RCS Prediction on Arbitrary Scanning Surfaces Based on Spherical Wave Expansion

Kim

Noh

et al. 2020

Sensors

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Near-field to far-field transformation (NFFFT) is a frequently-used method in antenna and radar cross section (RCS) measurements for various applications. For weapon systems, most measurements are captured in the near-field area in an anechoic chamber, considering the security requirements for the design process and high spatial costs of far-field measurements. As the theoretical RCS value is the power ratio of the scattered wave to the incident wave in the far-field region, a scattered wave measured in the near-field region needs to be converted into field values in the far-field region. Therefore, this paper proposes a near-field to far-field transformation algorithm based on spherical wave expansion for application in near-field RCS measurement systems. If the distance and angular coordinates of each measurement point are known, the spherical wave functions in an orthogonal relationship can be calculated. If each weight is assumed to be unknown, a system of linear equations as numerous as the number of samples measured in the near electric field can be generated. In this system of linear equations, each weight value can be calculated using the iterative least squares QR-factorization method. Based on this theory, the validity of the proposed NFFFT is verified for several scatterer types, frequencies and measurement distances.

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Bistatic RCS measurements in a compact range

Cited by 7 publications

References 9 publications

Bistatic RCS Measurements of Large Targets in a Compact Range

Bistatic RCS Measurements of Large Targets in a Compact Range

A Single-Antenna Method and Post-Processing Strategy for Radar Cross-Section Measurements at Near-Field Ranges

Near-Field to Far-Field RCS Prediction on Arbitrary Scanning Surfaces Based on Spherical Wave Expansion

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