Backscattering analysis of flat plate and dihedral corner reflectors using PO and comparison with RCS measurements in anechoic chamber

Andrade, L A; Nohara, Evandro Luís; Peixoto, G.G.; Rezende, Mirabel Cerqueira; Martin, InÃ¡cio M.

doi:10.1109/imoc.2003.1242667

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…Equation (4) shows that the field at any point outside the scattering body can be represented by the tangent field on the closed surface surrounding the scattering body in the far field. Suppose a plane wave is incident on a metal plate, and the incident field is:…”

Section: Tables and Figuresmentioning

confidence: 99%

“…In fact, due to the complexity of the scattering characteristics of real targets, the assumption that they are equivalent to ideal scattering centers is difficult to hold, and most scattering centers are not ideal. With the improvement of radar system resolution, it is found that the dependence of the target on frequency and azimuth cannot be ignored for some practical scattering mechanisms, such as dihedral angle scattering [3], [4], and the ideal point scattering center model can not accurately describe the scattering characteristics of the target. With the increase of bandwidth and imaging angle range, these non-ideal scattering characteristics are more obvious.…”

Section: Introductionmentioning

confidence: 99%

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Fine Feature Analysis of Metal Plate Based on Two-Dimensional Imaging under Non-Ideal Scattering

Deng

et al. 2023

IEICE Trans. Electron.

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The ideal point scattering model requires that each scattering center is isotropic, the position of the scattering center corresponding to the target remains unchanged, and the backscattering amplitude and phase of the target do not change with the incident frequency and incident azimuth. In fact, these conditions of the ideal point scattering model are difficult to meet, and the scattering models are not ideal in most cases. In order to understand the difference between non-ideal scattering center and ideal scattering center, this paper takes a metal plate as the research object, carries out two-dimensional imaging of the metal plate, compares the difference between the imaging position and the theoretical target position, and compares the shape of the scattering center obtained from two-dimensional imaging of the plate from different angles. From the experimental results, the offset between the scattering center position and the theoretical target position corresponding to the two-dimensional imaging of the plate under the non-ideal point scattering model is less than the range resolution and azimuth resolution. The deviation between the small angle two-dimensional imaging position and the theoretical target position using the ideal point scattering model is small, and the ideal point scattering model is still suitable for the two-dimensional imaging of the plate. In the imaging process, the ratio of range resolution and azimuth resolution affects the shape of the scattering center. The range resolution is equal to the azimuth resolution, the shape of the scattering center is circular; the range resolution is not equal to the azimuth resolution, and the shape of the scattering center is elliptic. In order to obtain more accurate two-dimensional image, the appropriate range resolution and azimuth resolution can be considered when using the ideal point scattering model for two-dimensional imaging. The two-dimensional imaging results of the plate at different azimuth and angle can be used as a reference for the study of non-ideal point scattering model.

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Section: Tables and Figuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fine Feature Analysis of Metal Plate Based on Two-Dimensional Imaging under Non-Ideal Scattering

Deng

et al. 2023

IEICE Trans. Electron.

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“…The metalcross shaped metamaterial dihedral (MCMD), cross-cross shaped metamaterial dihedral (CCMD) of the experimental samples and the measurement set-up are shown in figures 1(c), (d) and 2(b), respectively. The simulation results are acquired by simulation software, CST Microwave Studio, which is based on the Finite Integration Time(FIT) domain method [27]. In the CST simulation, two waveguide ports are added for transmitting and receiving electromagnetic waves.…”

Section: Introductionmentioning

confidence: 99%

Absorbing properties of metamaterial dihedral corner reflector

Wang²,

Yang

et al. 2020

Mater. Res. Express

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In this paper, the absorbing property of metal-cross shaped metamaterial dihedral (MCMD) and cross-cross shaped metamaterial dihedral (CCMD) with the same parameters are investigated. In TE mode, the absorptivities are 91.1% at 9.17 GHz for MCMD and 99.7% at 9.20 GHz for CCMD. For MCMD and CCMD, the absorptivities are 90.5% and 99.8% at 9.2 and 9.17 GHz respectively for the TM polarized incident wave. The results of simulation and measurement show that CCMD has better multi-band absorption performance and lower radar cross-section than MCMD. Experiments have demonstrated the reflection coefficient can be utilized to analyze the electromagnetic characteristics of dihedral corner as well. The study of dihedral corner reflector is of great importance as it is used in modeling many areas such as stealth technology, electromagnetic compatibility and target recognition.

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“…These works contributed to the development and performance improvement of the anechoic chamber. The articles [10][11][12][13][14][15][16] report computations and analyses on EM wave backscattering by corner reflectors. However, most of the reported computations for EM waves were done for non-polarized and linearly polarized waves.…”

Section: Introductionmentioning

confidence: 99%

Computation and Experiment on Linearly and Circularly Polarized Electromagnetic Wave Backscattering by Corner Reflectors in an Anechoic Chamber

et al. 2019

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Electromagnetic wave backscattering by corner reflectors in an anechoic chamber is studied using our developed computational tool. The tool applies the Finite-Difference Time-Domain (FDTD) method to simulate the propagation of the wave’s electric and magnetic fields. Experimental measurement in an anechoic chamber is also carried out as a comparison. The two results show agreement, including the finding that the backscatter intensity variation amongst the four circularly polarized modes is significantly smaller than the variation amongst the four linearly polarization modes.

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Backscattering analysis of flat plate and dihedral corner reflectors using PO and comparison with RCS measurements in anechoic chamber

Cited by 7 publications

References 3 publications

Fine Feature Analysis of Metal Plate Based on Two-Dimensional Imaging under Non-Ideal Scattering

Fine Feature Analysis of Metal Plate Based on Two-Dimensional Imaging under Non-Ideal Scattering

Absorbing properties of metamaterial dihedral corner reflector

Computation and Experiment on Linearly and Circularly Polarized Electromagnetic Wave Backscattering by Corner Reflectors in an Anechoic Chamber

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