2021
DOI: 10.26866/jees.2021.4.r.40
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Dynamic RCS Estimation according to Drone Movement Using the MoM and Far-Field Approximation

Abstract: Micro-Doppler signatures from the rotating propellers of a drone can be utilized to distinguish the drone from clutter or airborne organisms with similar radar cross section (RCS) levels, such as birds and bats. To obtain the micro-Doppler signatures of a drone, calculation or measurement of the electric field scattered from the rotating propellers is essential. In this paper, using the relative angle concept and far-field approximation, we propose a way to rapidly estimate the dynamic RCS of a drone with seve… Show more

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Cited by 8 publications
(5 citation statements)
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References 19 publications
(30 reference statements)
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“…Specifically, the full-wave electromagnetic analysis is iteratively performed by optimizing the complex permittivity such that the calculated S-parameters (𝑆 ) are successfully curve-fitted to the measured S-parameters with the Gaussian weighting moving average filter (𝑆 ). In this study, the method of moment (MoM) [13,14] with a parallel-plate Green's function is employed to calculate the S-parameters [10]. It should be noted that MoM is highly suitable for the optimization-based approach because it is significantly faster than other full-wave electromagnetic analysis methods, such as the finite element method [15] or the finite-difference time-domain method [16][17][18][19][20].…”
Section: Methodsmentioning
confidence: 99%
“…Specifically, the full-wave electromagnetic analysis is iteratively performed by optimizing the complex permittivity such that the calculated S-parameters (𝑆 ) are successfully curve-fitted to the measured S-parameters with the Gaussian weighting moving average filter (𝑆 ). In this study, the method of moment (MoM) [13,14] with a parallel-plate Green's function is employed to calculate the S-parameters [10]. It should be noted that MoM is highly suitable for the optimization-based approach because it is significantly faster than other full-wave electromagnetic analysis methods, such as the finite element method [15] or the finite-difference time-domain method [16][17][18][19][20].…”
Section: Methodsmentioning
confidence: 99%
“…In conventional numerical techniques, such as physical optics and method of moment, the first step involves obtaining the induced current on a scatterer, based on which the scattered field is calculated, from the incident field. This concept is commonly considered when calculating scattered fields from a target [10] and designing reflector antennas [11].…”
Section: Effect Of Large Targetmentioning
confidence: 99%
“…Among them, time-domain methods mainly include clutter simulation methods based on statistical models [8], backscatter simulation methods based on measured SAR images, and SAR image simulation methods based on digital elevation models (DEMs) [9,10], which are mainly aimed at simulating large-scene SAR images and have the advantage of low algorithm complexity. Frequency-domain methods mainly include finite-difference time-domain (FDTD) [11][12][13], method of moments (MOM) [14][15][16], physical optics (PO), geometric optics (GO), and SBR methods [17][18][19]. These methods calculate the frequency-domain response of the target to obtain the SAR image and have the characteristics of high algorithm complexity and high calculation accuracy [20].…”
Section: Introductionmentioning
confidence: 99%