Sökning: "waveguides"
Visar resultat 11 - 15 av 136 avhandlingar innehållade ordet waveguides.
11. Numerical Conformal Mappings for Waveguides
Sammanfattning : Acoustic or electro-magnetic scattering in a waveguide with varying direction and cross-section can be re-formulated as a two-dimensional scattering problem, provided that the variations take place in only one dimension at a time. By using the so-called Building Block Method, it is possible to construct the scattering properties of a combination of scatterers when the properties of each scatterer are known. LÄS MER
12. Perturbation approach to reconstructions of boundary deformations in waveguide structures
Sammanfattning : In this thesis we develop inverse scattering algorithms towards the ultimate goal of online diagnostic methods. The aim is to detect structural changes inside power transformers and other major power grid components, like generators, shunt reactors etc. LÄS MER
13. Microwave breakdown : physics and applications
Sammanfattning : .... LÄS MER
14. Microwave Breakdown: Physics and Applications
Sammanfattning : Theories for microwave breakdown in gases, with emphasis on Air, are presented in this thesis. Underlying physical processes are described together with models suitable for scientific research and technical development. LÄS MER
15. Transient Electromagnetic Waves in Nonlinear Media
Sammanfattning : This thesis is concerned with the propagation of transient electromagnetic waves in nonlinear media. It consists of a General Introduction and five scientific papers. The General Introduction gives a broad overview of nonlinear electromagnetic phenomena. LÄS MER