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The thesis discusses solution concepts of an elementary electromagnetic diffraction problem: an infinite slot-line with semi-infinite metallization (Section 1.2). The treated configuration is motivated within the context of edge-diffraction problems concerning planar antennas with finite ground planes (Section 1.1). In Chapter 2, a current-line modell describing the diffracted fields for the case of transient excitation is developed. Chapter 3 presents an approximated ray-optical solution of the treated diffraction configuration in the case of time-harmonic excitation. It was the aim of the author to expose the relations of his own solution concepts with several ideas presented in the past in different diffraction theories. In particular Keller’s Geometrical Theory of Diffraction and Ufimtsev’s Physical Theory of Diffraction. This is done in Section 2.2. For understanding the general behaviour of electromagnetic fields at sharp edges, Sommerfeld’s diffraction problem and Meixner’s edge condition are treated in Appendix D.

Beiträge zur Beugungstheorie elektromagnetischer Wellen an Kanten vollkommen leitender Flächen