Berlin 2005 – scientific programme

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MP: Theoretische und Mathematische Grundlagen der Physik

MP 6: Wave Equations and Scattering Theory

MP 6.3: Fachvortrag

Wednesday, March 9, 2005, 12:45–13:05, TU MA043

Perturbation theory for scattering at a slightly changed object — •Ivo Knittel¹, Andreas Ziroff², and Uwe Hartmann¹ — ¹Institute of Experimental Physics, University of Saarbrücken, 66041 Saarbrücken — ²Siemens AG, Unternehmensbereich CT PS 7, Otto-Hahn-Ring 6, 81730 München

In the engineering of microwave and photonic devices, the definition of tolerances is an important problem. We sugggest a perturbation approach to the scattering matrix of an arbitrary object after a slight change in the geometry, in particular a small shift of a reflecting surface that is part of the object. We present the theory for electromagnetism, but the approach is valid for any time-symmetric wave equation.