Evaluation of Electromagnetic Scattering by Conducting Bodies of Revolution With Discontinuous Currents

Resende, Úrsula C.; Moreira, Fernando J. S.; Bergmann, J.R.; Gonçalves, Sandro

doi:10.1109/tmag.2015.2487869

Cited by 2 publications

(4 citation statements)

References 11 publications

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“…The feed model exponential is n = 2.8, yielding −8.5 dB attenuation at θ c and approximates the radiation pattern provided by a 90° corrugated feed described in Ref. [13] that will be used in the full wave analysis conducted by a CST Studio Suite. To initialise the numerical iterative scheme for the solution of the MA equation, the formulation presented in Ref.…”

Section: Design Examplesmentioning

confidence: 99%

“…Figure 9 shows the contour plot radiation pattern given by the CST full‐wave analysis at 30 GHz, where the 90° corrugated horn illuminates the lens with horn's aperture centre at the origin of the coordinate system [13]. Compared with the results given by the PO‐GO analysis in Figure 8a, oscillations increase as some diffractive effects are considered in the full‐wave analysis.…”

Section: Design Examplesmentioning

confidence: 99%

“…Figure 15 shows the contour plot radiation pattern given by the CST full analysis at 30 GHz, with the 90° corrugated horn illuminating the lens [13].…”

Section: Design Examplesmentioning

confidence: 99%

See 2 more Smart Citations

Three‐dimensional single‐shell dielectric lens design using complex coordinates and local axis‐displaced confocal quadrics

Assis

Bergmann

Moreira

2023

IET Microwaves Antenna & Prop

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This study proposes an analytical formulation in complex coordinates to synthesise threedimensional single-shell dielectric lens surfaces. An exact formulation based on geometrical optics is developed, and the synthesis problem is modelled as a non-linear second-order partial differential equation of the Monge-Ampère (MA) type. An alternative numerical scheme based on axis-displaced confocal quadrics is used to locally represent the surface of dielectric lens. The advantage of this approach is to analytically obtain the partial derivatives present in the MA equation. To validate the proposed methodology, numerical results are obtained by an iterative algorithm that allows the simultaneous control of the transmitted beam width and the power density amplitude in the far-field region. To illustrate the synthesis effectiveness, two examples of lens antennas are simulated and analysed.

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Section: Design Examplesmentioning

confidence: 99%

Section: Design Examplesmentioning

confidence: 99%

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Three‐dimensional single‐shell dielectric lens design using complex coordinates and local axis‐displaced confocal quadrics

Assis

Bergmann

Moreira

2023

IET Microwaves Antenna & Prop

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“…The solution of this Eq. 12 is obtained numerically by using Method of Moments (MOM) and due to the rotational symmetry of the body can use the Fourier series to represent this function: According to Galerkin's approach (W & = j*) and J* are the orthogonal vector to the surface S (Resende et al, 2015).…”

Section: Radar Cross Section (Rcs)mentioning

confidence: 99%

The Effect of the Dimensions of the Body on the Radar Cross Section (RCS)

Mohammed¹

2019

J. Eng. Appl. Sci.

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Scattering is the reflection of electromagnetic radiation in various directions, as a result of gas and dust particles located in space. The form of electromagnetic scattering problem for the Body of Revolution (BOR) that are generated by the rotation of an axis called the axis of symmetry because of the symmetry advantages, surface currents can be represented by a fourier series to express the basic function of the current and the test function. Scattering problem can be solved by the equations of the Electric Field Integral Equation (EFIE) and Magnetic Field Integral Equation (MFIE), Galerkin approach was chosen as a method of calculation in this field. The principle of this method depends on the choice of the weighting function that is equal to the complex conjugate of the basis function. The basis function is selected accurately to obtain good results for the scattering problem which is difficult to solve theoretically due to the special boundary conditions for this problem, This method requires a large number of basis functions and testing functions to suit the exact solution. in addition to the Method of Moments (MOM) which is a numerical method for solving electrical and magnetic integrals equations which can calculate the Radar Cross Section (RCS) for the conducting bodies.

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Evaluation of Electromagnetic Scattering by Conducting Bodies of Revolution With Discontinuous Currents

Cited by 2 publications

References 11 publications

Three‐dimensional single‐shell dielectric lens design using complex coordinates and local axis‐displaced confocal quadrics

Three‐dimensional single‐shell dielectric lens design using complex coordinates and local axis‐displaced confocal quadrics

The Effect of the Dimensions of the Body on the Radar Cross Section (RCS)

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