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  • Digitale Medien  (4)
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  • Digitale Medien  (4)
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  • 1
    Digitale Medien
    Digitale Medien
    An admittance solution for electromagnetic coupling through a small aperture (1983)
    Springer
    Flow, turbulence and combustion 40 (1983), S. 39-69 
    Details
    ISSN: 1573-1987
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract An admittance solution for electromagnetic coupling through a small aperture in a conducting screen is obtained by the method of moments. This solution gives the equivalent magnetic current in the aperture as a linear combination of the three quasistatic magnetic currents responsible for the three dipole fields seen in the far zone. Because only the dipole effects of the quasi-static currents are known, the elements of the excitation vector and the admittance matrix cannot be evaluated directly. Reciprocity is used to express the elements of the excitation vector in terms of the short-circuit incident fields. The imaginary parts of the elements of the admittance matrix are evaluated by forcing the moment solution to be equal to the solution predicted by conventional small aperture theory. The real parts of the elements of the admittance matrix are extracted from the quadratic expression for the power radiated by the magnetic current. The solution is applied to three examples — an aperture in a conducting plane, an aperture in a transverse wall between two rectangular waveguides, and an aperture in a lateral wall of a rectangular waveguide coupling to a half-space.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00539375
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  • 2
    Digitale Medien
    Digitale Medien
    Cavity resonators containing anisotropic media (1966)
    Springer
    Flow, turbulence and combustion 16 (1966), S. 46-64 
    Details
    ISSN: 1573-1987
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Summary A general procedure for determining the resonant frequencies and mode vectors of cavity resonators of arbitrary shape and containing media characterized by arbitrary tensor permeabilities and permittivities is given. The method is basically that of Galerkin applied to an operator formulation of the problem. The solution is in the form of a matrix eigenvalue equation, which can be solved by conventional computational techniques. The general formulas are specialized to the case of a rectangular cavity containing gyrotropic plasma, and representative numerical calculations are given. The solution is compared to a first-order perturbation solution to illustrate to what extent the latter can be used as an approximation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00384054
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  • 3
    Digitale Medien
    Digitale Medien
    The potential integral for a linear distribution over a triangular domain (1982)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 18 (1982), S. 1821-1828 
    Details
    ISSN: 0029-5981
    Schlagwort(e): Engineering ; Engineering General
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Mathematik , Technik allgemein
    Notizen: In this paper an exact expression is derived for the potential at an arbitrary point due to a linear distribution of source over a triangular domain. The integral which gives the potential is evaluated by means of an extension of an analytical procedure previously evolved for a constant distribution. Numerical values of the potential are obtained for several field points by evaluating the above analytical expression, and are compared with those calculated by using triangle quadratures.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/nme.1620181206
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  • 4
    Digitale Medien
    Digitale Medien
    The potential due to a uniform source distribution over a triangular domain (1982)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 18 (1982), S. 1401-1411 
    Details
    ISSN: 0029-5981
    Schlagwort(e): Engineering ; Engineering General
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Mathematik , Technik allgemein
    Notizen: An exact expression is derived for the potential due to a uniform source distribution over a triangular domain. This expression, which is valid for arbitrary field points, is important for the numerical solution of electromagnetic field problems. Numerical values of the potential are calculated by using the expression obtained, and are compared with the results derived by numerical integration.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/nme.1620180911
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