Near-field pattern analysis of airborne antennas

Burnside, W. D.; Wang, Nan; Pelton, E.

doi:10.1109/tap.1980.1142335

Cited by 35 publications

(3 citation statements)

References 7 publications

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“…The corner diffraction is included in the field by EECs as the truncation of currents without special treatment in contrast with the cases in [21]- [27].…”

Section: Introductionmentioning

confidence: 99%

Modified Edge Representation (MER) Consisting of Keller’s Diffraction Coefficients With Weighted Fringe Waves and Its Localization for Evaluation of Corner Diffraction

Ali

Kohama

Ando

2015

IEEE Trans. Antennas Propagat.

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Equivalent edge currents (EECs) for high-frequency diffraction analysis are intermediate concepts between ray theory and wave optics [physical optics (PO)]. The methods of EEC present some ambiguity in the definition of currents at general edge points, which do not satisfy the diffraction law. Modified edge representation (MER) is a unique concept for a complete definition of EEC with simple and classical Keller-type knife-edge diffraction coefficients. Although singularities in the definition of EEC exist, the line integration of MER EEC results uniform and accurate fields everywhere including geometrical boundaries except for the case of grazing incidence, where reflection and incidence shadow boundaries (RSB and ISB) are close to each other. In this paper, fringe wave (FW) part of MER EEC is modified by introducing the weighting in terms of Fresnel zone number (FZN) distance from the reflection point to improve the accuracy at and near shadow boundaries even in grazing incidence. Next, the corner diffraction, a contribution coming from edge point which does not satisfy the diffraction law, is extracted in MER by introducing another weighting function using the FZN distance from scattering centers on edge. Its remarkable accuracy fully validates MER EECs at general edge points. The dipole wave scattering from flat square and triangular plates are discussed with numerical examples. Index Terms-Corner diffraction, equivalent edge current (EEC), Fresnel zone, geometrical theory of diffraction (GTD), modified edge representation (MER), uniform theory of diffraction (UTD).

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“…The corner diffraction is included in the field by EECs as the truncation of currents without special treatment in contrast with the cases in [21]- [27].…”

Section: Introductionmentioning

confidence: 99%

Modified Edge Representation (MER) Consisting of Keller’s Diffraction Coefficients With Weighted Fringe Waves and Its Localization for Evaluation of Corner Diffraction

Ali

Kohama

Ando

2015

IEEE Trans. Antennas Propagat.

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“…In , a corner diffraction coefficient was developed to account for the termination of an edge in a finite perfectly conducting object. This UTD‐based diffraction coefficient has been used to predict successfully the corner effect for a number of plate structures.…”

Section: Introductionmentioning

confidence: 99%

A new time‐domain corner diffraction coefficient for metallic and dielectric objects for UWB signals

Bansal

Soni

2015

Micro & Optical Tech Letters

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In this article, a new time‐domain (TD) corner diffraction coefficient is proposed for diffraction of ultrawide band signals by objects like metallic and dielectric three‐dimensional wedge and building. The proposed TD solution has been validated with the inverse fast Fourier transform of the corresponding frequency‐domain (FD) solution where the exact match confirms the accuracy of the proposed solution. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1760–1765, 2015

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“…by Satterwhite [64] but is extremely inefficient for numerical calculations. An approximate corner diffraction coefficient was then proposed by Burnside and Pathak [50,58] in the context of UTD to efficiently compute the corner diffracted fields. This coefficient was derived by asymptotically evaluating the EC current integral of Equation The complete solution for the corner diffracted fields must also include the contribution associated with the other edge which forms the corner in a similar manner as above.…”

Section: H Diffraction By a Cornermentioning

confidence: 99%

Electromagnetic Scattering From Inlets and Plates Mounted on Arbitrary Smooth Surfaces

Βολακησ¹

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Near-field pattern analysis of airborne antennas

Cited by 35 publications

References 7 publications

Modified Edge Representation (MER) Consisting of Keller’s Diffraction Coefficients With Weighted Fringe Waves and Its Localization for Evaluation of Corner Diffraction

Modified Edge Representation (MER) Consisting of Keller’s Diffraction Coefficients With Weighted Fringe Waves and Its Localization for Evaluation of Corner Diffraction

A new time‐domain corner diffraction coefficient for metallic and dielectric objects for UWB signals

Electromagnetic Scattering From Inlets and Plates Mounted on Arbitrary Smooth Surfaces

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