Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729303696
Category :
Languages : en
Pages : 56
Book Description
This report describes an application of the method of moments to calculate the electromagnetic scattering from irregularly shaped, thin, metallic flat plates in free space. In the present technique, an irregularly shaped plate is enclosed by a rectangle on which the surface-current density is then expressed in terms of subdomain functions by dividing the rectangle into subsections. A shape function is introduced to ensure zero current outside the patch. The surface-current density is determined using the electric field integral equation (EFIE) approach in conjunction with the method of moments, and from a knowledge of the surface-current density, the electromagnetic scattering from a plate is calculated. Using this technique, the electromagnetic scattering from a hexagonal plate; an equilateral triangular plate; an equilateral triangular plate with a concentric, equilateral triangular hole and an inverted, equilateral triangular hole; and a diamond-shaped plate is computed and compared with the numerical results obtained by using the Electromagnetic Surface Patch (ESP) code developed by Ohio State University. The numerical results compare favorably with the measurements performed on these shapes in the Langley Experimental Test Range facility. Deshpande, Manohar D. and Cockrell, C. R. and Beck, Fred B. and Vedeler, Erik and Koch, Melissa B. Langley Research Center
Analysis of Electromagnetic Scattering from Irregularly Shaped, Thin, Metallic Flat Plates
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729303696
Category :
Languages : en
Pages : 56
Book Description
This report describes an application of the method of moments to calculate the electromagnetic scattering from irregularly shaped, thin, metallic flat plates in free space. In the present technique, an irregularly shaped plate is enclosed by a rectangle on which the surface-current density is then expressed in terms of subdomain functions by dividing the rectangle into subsections. A shape function is introduced to ensure zero current outside the patch. The surface-current density is determined using the electric field integral equation (EFIE) approach in conjunction with the method of moments, and from a knowledge of the surface-current density, the electromagnetic scattering from a plate is calculated. Using this technique, the electromagnetic scattering from a hexagonal plate; an equilateral triangular plate; an equilateral triangular plate with a concentric, equilateral triangular hole and an inverted, equilateral triangular hole; and a diamond-shaped plate is computed and compared with the numerical results obtained by using the Electromagnetic Surface Patch (ESP) code developed by Ohio State University. The numerical results compare favorably with the measurements performed on these shapes in the Langley Experimental Test Range facility. Deshpande, Manohar D. and Cockrell, C. R. and Beck, Fred B. and Vedeler, Erik and Koch, Melissa B. Langley Research Center
Publisher: Independently Published
ISBN: 9781729303696
Category :
Languages : en
Pages : 56
Book Description
This report describes an application of the method of moments to calculate the electromagnetic scattering from irregularly shaped, thin, metallic flat plates in free space. In the present technique, an irregularly shaped plate is enclosed by a rectangle on which the surface-current density is then expressed in terms of subdomain functions by dividing the rectangle into subsections. A shape function is introduced to ensure zero current outside the patch. The surface-current density is determined using the electric field integral equation (EFIE) approach in conjunction with the method of moments, and from a knowledge of the surface-current density, the electromagnetic scattering from a plate is calculated. Using this technique, the electromagnetic scattering from a hexagonal plate; an equilateral triangular plate; an equilateral triangular plate with a concentric, equilateral triangular hole and an inverted, equilateral triangular hole; and a diamond-shaped plate is computed and compared with the numerical results obtained by using the Electromagnetic Surface Patch (ESP) code developed by Ohio State University. The numerical results compare favorably with the measurements performed on these shapes in the Langley Experimental Test Range facility. Deshpande, Manohar D. and Cockrell, C. R. and Beck, Fred B. and Vedeler, Erik and Koch, Melissa B. Langley Research Center
Analysis of Electromagnetic Scattering from Irregularly Shaped, Thin, Metallic Flat Plates
Author: Manohar D. Deshpande
Publisher:
ISBN:
Category : Scattering (Physics)
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category : Scattering (Physics)
Languages : en
Pages : 56
Book Description
Electromagnetic Scattering from a Polygonal Thin Metallic Plate Using Quadrilateral Meshing
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781723722387
Category : Science
Languages : en
Pages : 42
Book Description
The problem of electromagnetic (EM) scattering from irregularly shaped, thin, metallic flat plates in free space is solved using the electric field integral equation (EFIE) approach in conjunction with the method of moments (MoM) with quadrilateral meshing. An irregularly shaped thin plate is discretized into quadrilateral patches and the unknown electric surface current over the plate is expressed in terms of proper basis functions over these patches. The basis functions for the electric surface current density that satisfy the proper boundary conditions on these quadrilateral patches are derived. The unknown surface current density on these quadrilateral patches is determined by setting up and solving the electric field integral equation by the application of the MoM. From the knowledge of the surface current density, the EM scattering from various irregularly shaped plates is determined and compared with the earlier published results. The novelty in the present approach is the use of quadrilateral patches instead of well known and often used triangular patches. The numerical results obtained using the quadrilateral patches compare favorably with measured results.Deshpande, Manohar D.Langley Research CenterELECTROMAGNETIC SCATTERING; METHOD OF MOMENTS; FLAT PLATES; COMPUTATIONAL GRIDS; ELECTRIC CURRENT; CURRENT DENSITY; SURFACE PROPERTIES; INTEGRAL EQUATIONS; MATHEMATICAL MODELS; BOUNDARY CONDITIONS; NUMERICAL ANALYSIS
Publisher: Independently Published
ISBN: 9781723722387
Category : Science
Languages : en
Pages : 42
Book Description
The problem of electromagnetic (EM) scattering from irregularly shaped, thin, metallic flat plates in free space is solved using the electric field integral equation (EFIE) approach in conjunction with the method of moments (MoM) with quadrilateral meshing. An irregularly shaped thin plate is discretized into quadrilateral patches and the unknown electric surface current over the plate is expressed in terms of proper basis functions over these patches. The basis functions for the electric surface current density that satisfy the proper boundary conditions on these quadrilateral patches are derived. The unknown surface current density on these quadrilateral patches is determined by setting up and solving the electric field integral equation by the application of the MoM. From the knowledge of the surface current density, the EM scattering from various irregularly shaped plates is determined and compared with the earlier published results. The novelty in the present approach is the use of quadrilateral patches instead of well known and often used triangular patches. The numerical results obtained using the quadrilateral patches compare favorably with measured results.Deshpande, Manohar D.Langley Research CenterELECTROMAGNETIC SCATTERING; METHOD OF MOMENTS; FLAT PLATES; COMPUTATIONAL GRIDS; ELECTRIC CURRENT; CURRENT DENSITY; SURFACE PROPERTIES; INTEGRAL EQUATIONS; MATHEMATICAL MODELS; BOUNDARY CONDITIONS; NUMERICAL ANALYSIS
Electromagnetic Scattering From a Polygonal Thin Metallic Plate Using Quadrilateral Meshing
Author: Manohar D. Deshpande
Publisher: DIANE Publishing
ISBN: 1428995110
Category : Shielding (Electricity)
Languages : en
Pages : 40
Book Description
Publisher: DIANE Publishing
ISBN: 1428995110
Category : Shielding (Electricity)
Languages : en
Pages : 40
Book Description
Resonant Frequencies of Irregularly Shaped Microstrip Antennas Using Method of Moments
Author: Manohar D. Deshpande
Publisher:
ISBN:
Category : Microstrip antennas
Languages : en
Pages : 48
Book Description
Publisher:
ISBN:
Category : Microstrip antennas
Languages : en
Pages : 48
Book Description
Electromagnetic Scattering From a Polygonal Thin Metallic Plate Using Quadrilateral Meshing
Scientific and Technical Aerospace Reports
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 874
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 874
Book Description
Monthly Catalogue, United States Public Documents
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 872
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 872
Book Description
UTD Analysis of Electromagnetic Scattering by Flat Plate Structures
Author: Fathi Abdalla Sikta
Publisher:
ISBN:
Category : Plates (Engineering)
Languages : en
Pages : 752
Book Description
Publisher:
ISBN:
Category : Plates (Engineering)
Languages : en
Pages : 752
Book Description