Over the past decades computational electromagnetics tools have become an indispensable aid for engineers and scientists. Partial Differential Equation techniques, with the Finite Element method being an example, are recognised as being the standard approach for the electromagnetic analysis of closed structures such as waveguide components and cavities. A major drawback of these techniques results from the fact that they require a spacesegmentation of the domain under consideration. If complex geometries or structures with dimensions exceeding few wavelengths are to be solved, the resulting meshes tend to become very large, which is undesirable in terms of memory requirements and computation time. In contrast, a striking feature of the Mode Matching technique discussed in this thesis is its ability to efficiently solve the field problem imposed by such structures, provided they can be decomposed into sub-domains whose spectrum of Eigenmodes is known analytically. Using the Mode Matching technique, orthogonal expansion of the yet unknown tangential fields at the interfaces between these sub-domains is performed, which leads to a system of equations that can be solved for the Eigenmodes‘ amplitudes. Several applications such as waveguide filter design strongly benefit from the Mode Matching technique‘s computational efficiency rather than they suffer from the geometric limitations resulting from the method‘s quasi-analytical approach. The present thesis provides a complete treatise of the Mode Matching technique. While literature has focused almost exclusively on the method‘s underlying electromagnetic concept, this work offers in-depth insights into implementation-related aspects such as efficient matrix population and proper scattering parameter calculation. To illustrate the advantages of the Mode Matching technique, the solvers developed in the scope of this thesis are used to analyse problems from two fields of application: The analysis of waveguide filters represents the first application studied in this thesis: Various filter structures have been investigated using the newly developed solvers. Both the simulation methodology as well as the obtained results are discussed with a special focus on the close interplay between filter design and full-wave analysis of waveguide filters. Moreover, the analysis of partially filled coaxial waveguides, which may be included in tubular filters to increase the power handling capability, is another focus of this work. The second application of the Mode Matching technique examined in this thesis is the analysis of electromagnetic cavities used for cavity perturbation material measurements. This thesis presents a concise outline of the cavity perturbation material measurement technique and contributes a rigorous analysis of „secondary effects“ afflicting this method. To illustrate the superiority of the Mode Matching technique, a performance comparison between the Mode Matching solvers developed in the scope of this thesis and a commercial Finite Element tool was conducted. The findings from this comparison illustrate for suitable structures that Mode Matching by far outperforms the commercial Finite Element implementation in terms of computation time and accuracy.

This book details how to design and fabricate microresonators. It covers the latest in microresonator research and discusses them in photonic crystals, microsphere circuits and sensors. It includes application-oriented examples.

On June 1St 2004 the Faculty of Electrical Engineering and Information Technology of the Technische Universitat Miinchen bestowed the degree of the doctor honoris causa to Leopold B. Felsen, for extraordinary achievements in the theory of electromag netic fields. On this occasion on June 1St and 2nd 2004 at the Technische Universitat Miinchen a symposium on "Fields, Networks, Computational Methods, and Systems: A Modern View of Engineering Electrodynamics" in honor of Leopold B. Felsen was organized. The symposium topic focused on an important area of Leopold Felsen research interests and, as the title emphasizes, on a modern view of applied Electro dynamics. While the fundamental physical laws of electrodynamics are well known, research in this field is experiencing a steady continuous growth. The problem -solving approaches of, say, twenty years ago may seem now fairly obsolete since considerable progress has been made in the meantime. In this monograph we collect samples of present day state of the art in dealing with electromagnetic fields, their network theory representation, their computation and, finally, on system applications. The network formulation of field problems can improve the problem formulation and also contribute to the solution methodology. Network theory systematic approaches for circuit analysis are based on the separation of the circuit into the connection circuit and the circuit elements. Many applications in science and technology rely on computations of the electromagnetic field in either man-made or natural complex structures.

The field of microwave engineering has undergone a radical transformation in recent years, as commercial wireless endeavors overtook defense and government work. The modern microwave and RF engineer must be knowledgeable about customer expectations, market trends, manufacturing technologies, and factory models to a degree that is unprecedented. Unf

Here, more than 20 experts from leading research institutes around the world present the entire scope of this rapidly developing field. In so doing, they cover a wide range of topics, including the characterization and investigation of structural, dielectric and piezoelectric properties of ceramic materials, a well as phase transitions, electrical and optical properties and microscopic investigations. Another feature is a complete profile of the properties of polar oxides -- from their proof to their latest applications. Throughout, the authors review, discuss and assess the material properties with regard to new and advanced characterization and imaging techniques. For physicists, physicochemists, semiconductor and solid state physicists, materials scientists, and students of chemistry and physics.

Providing an eclectic snapshot of the current state of the art and future implications of the field, Nanomaterials, Polymers, and Devices: Materials Functionalization and Device Fabrication presents topics grouped into three categorical focuses: The synthesis, mechanism and functionalization of nanomaterials, such as carbon nanotubes, graphene, silica, and quantum dots Various functional devices which properties and structures are tailored with emphasis on nanofabrication. Among discussed are light emitting diodes, nanophotonic, nano-optical, and photovoltaic devices Nanoelectronic devices, which include semiconductor, nanotube and nanowire-based electronics, single-walled carbon-nanotube based nanoelectronics, as well as thin-film transistors

This book delivers an in-depth examinations of the three basic field-theoretical methods used for the design aid of different waveguide components. You'll find CAD algorithms, examples of their applications, and operational principles of various components used in antenna feed systems.