Reviews and abstracts - Electromagnetic scattering from a homogeneous body of revolution

Mautz, Joseph R.; Harrington, R.

doi:10.1109/map.1978.27344

Cited by 76 publications

(160 citation statements)

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“…The resulting sets of simultaneous equations may be represented in matrix form as (17) where is the moment matrix, is a column vector containing the unknown basis function coefficients, and is the driving vector for the th Fourier mode [21]- [23], [25]- [26]. Details regarding the calculation of the impedance matrix or the driving vector can be found in the literature.…”

Section: B Surface Integral Equation and Mommentioning

confidence: 99%

“…Assuming poles of single order, which is true for the conducting and permeable targets of interest here [3], [19], the system function in the Laplace domain and the corresponding impulse response are given by (24) where the excitation coefficients for pairs of conjugate complex poles satisfy Therefore the components of the signal vector can be written as (25) with where represents the time increment for the sampling and, hence, the total observation time. The vector of the unknown parameters (excluding the noise variance ) is given by (26) and the likelihood function is [33]- [34] (27)…”

Section: Cramer-rao Lower Boundmentioning

confidence: 99%

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On the low-frequency natural response of conducting and permeable targets

Geng

Baum

Carin

1999

IEEE Trans. Geosci. Remote Sensing

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Abstract-The low-frequency natural response of conducting, permeable targets is investigated. We demonstrate that the source-free response is characterized by a sum of nearly purely damped exponentials, with the damping constants strongly dependent on the target shape, conductivity, and permeability, thereby representing a potential tool for pulsed electromagnetic induction (EMI) identification (discrimination) of conducting and permeable targets. This general concept is then specialized to the particular case of a body of revolution (BOR), for which the Method-of-Moments (MoM)-computed natural damping constants from several targets are compared with measurements. Moreover, theoretical natural (equivalent) surface currents and damping coefficients are shown for other targets of interest. Finally, we investigate the practical use of such natural signatures in the context of identification, wherein Cramer-Rao bound (CRB) studies address signal-to-noise ratio (SNR) considerations.

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Section: B Surface Integral Equation and Mommentioning

confidence: 99%

Section: Cramer-rao Lower Boundmentioning

confidence: 99%

On the low-frequency natural response of conducting and permeable targets

Geng

Baum

Carin

1999

IEEE Trans. Geosci. Remote Sensing

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“…To demonstrate the usefulness of the AWE method, we implemented it into the MOM code described by Chao In addition to PEC objects treated above, the AWE method is also applicable to dielectric objects. A formulation that is widely used for scattering by a dielectric object is the so-called PMCHW [Mautz and Harrington, 1979 …”

Section: Numerical Examplesmentioning

confidence: 99%

Fast and accurate frequency‐sweep calculations using asymptotic waveform evaluation and the combined‐field integral equation

Jiao¹,

Zhu²,

Jin³

1999

Radio Science

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Abstract. The method of asymptotic waveform evaluation (AWE) is applied to the combined-field integral equation (CFIE) to achieve fast and accurate frequency-sweep calculations of electromagnetic scattering and radiation by three-dimensional conducting and dielectric objects. The employment of the CFIE eliminates the interior resonance problem suffered by both the electric-field integral equation and the magnetic-field integral equation. It is shown that the use of AWE can speed up the calculation by more than an order of magnitude. It is also shown that when combined with the complex frequency hopping technique, the AWE method can produce an accurate solution within a prespecified frequency band. Numerical examples are presented to demonstrate the performance of the proposed method.

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“…The field decomposition approach [1] is employed to split the homogeneous BI medium into two uncoupled isotropic media. We formulate the surface integral equations (SIE) using the PaggioMiller-Chang-Harrington-Wu-Tsai (PMCHWT) approach [27,28] for multiple homogeneous isotropic media and the electric field approach for conducting objects. The resultant integral equations are discretized by MoM.…”

Section: Introductionmentioning

confidence: 99%

Solution to Electromagnetic Scattering by Bi-Isotropic Media Using Multilevel Green's Function Interpolation Method

Shi

Chan²

2009

PIER

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Abstract-In this paper, a multilevel Green's function interpolation method (MLGFIM) is developed to analyze electromagnetic scattering from an arbitrarily shaped three-dimensional objects comprised of both conductor and bi-isotropic media. The field decomposition method is adopted to split the homogeneous bi-isotropic media into two uncoupled isotropic media instead of direct calculation of complicated Green's function in bi-isotropic material. The problem is formulated using the Paggio-Miller-Chang-Harrington-WuTsai (PMCHWT) approach for multiple homogeneous isotropic media and electric field approach for conducting bodies. The resultant integral equations are discretized by the method of moment (MoM) and iteratively solved by MLGFIM. Numerical examples illustrate accuracy of this algorithm and CPU time of O(N log N ) and memory requirement of O(N ).

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Reviews and abstracts - Electromagnetic scattering from a homogeneous body of revolution

Cited by 76 publications

References 0 publications

On the low-frequency natural response of conducting and permeable targets

On the low-frequency natural response of conducting and permeable targets

Fast and accurate frequency‐sweep calculations using asymptotic waveform evaluation and the combined‐field integral equation

Solution to Electromagnetic Scattering by Bi-Isotropic Media Using Multilevel Green's Function Interpolation Method

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