Radar Cross Section Prediction Using Iterative Physical Optics With Physical Theory of Diffraction

Shah, Manthan A.; Tokgöz, Çağatay; Salau, Babajide A.

doi:10.1109/tap.2021.3137202

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…The comparison of the magnitude difference between the triply reflected path and the edge diffracted paths is outlined in Table 2 for the normal incidence angle. Note that at the off‐normal incidence angles, the contribution of triply reflected paths gradually diminishes in magnitude thus the relative contribution of diffracted fields to the overall RCS increases [5, 9–12]. These important observations in the literature and the measurement results shown here demonstrate that diffraction in the E‐band is still relevant for accurate RCS calculation especially at off‐normal incidence angles.…”

Section: Resultsmentioning

confidence: 60%

“…The interaction mechanisms contributing to the RCS signature of a TCR include: single, double, and triple reflections and diffraction from the interior and exterior edges [9]. In microwave frequencies, extensive simulations and measurements have been carried out in the literature to characterize the TCR scattering characteristics, whereby modeling of edge diffracted fields has been shown to improve the RCS simulation accuracy in comparison to measurements [5,[9][10][11][12].…”

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confidence: 99%

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Experimental characterization of scattering from the trihedral corner reflector in the E‐band

Mbugua

Chen

Alfageme

et al. 2023

Electronics Letters

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Canonical objects with known radar cross section (RCS), for example, the trihedral corner reflector (TCR), play a crucial role in the calibration of automotive radar sensors. Moreover, these canonical objects are also used in the validation of simulated RCS obtained using asymptotic methods, such as hybrid geometric optics (GO) and the physical optics (PO) based methods. However, accurate RCS prediction with asymptotic methods is highly dependent on the individual scattering mechanisms considered in a simulation, for example reflection and diffraction from the TCR surfaces and edges, respectively. Reliable measurements are therefore required to evaluate if a particular interaction mechanism can be neglected to reduce computation complexity without adversely affecting the accuracy of the predicted RCS. In this letter, the monostatic scattering characteristics of three metallic TCRs are investigated with varying geometrical sizes in the E-band, that is, from 60 GHz to 90 GHz. The ultra-wideband (UWB) measurements, which offer a high delay resolution, can enable the identification of the individual scattering mechanisms. Diffraction from the TCR edges is experimentally demonstrated to contribute to a non-negligible scattered power in this frequency band.

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Section: Resultsmentioning

confidence: 60%