Coupling Of Electromagnetic Fields To Circuits In A Cavity

Offers a detailed explanation of the development of the impedance concept and its equivalent microwave circuits.

This report documents the research performed to develop physical insight into the coupling of radiated, pulsed, electromagnetic energy to a thin wire located inside a rectangular metallic en sure. The electromagnetic fields diffuse into the rectangular cavity. The cavity size is not small compared to the wavelengths in the exciting field. A prime objective was to determine how the wire transients will change due to the parameters of cavity size, wire locations and orientation, and incident pulse parameters such as polarization, risetime, and decay time. The approach involved frequency domain analysis based on three distinct frequency regimes: low, intermediate, and high. In the low frequency region the skin depth is larger than the wall thickness of the enclosure. The intermediate region extends to the lowest internal mode of the enclosure. The high frequency region extends upward from the lowest mode. validation of the analytical results, planned under Phase II of the SBIR, were not performed ... EMP, Electromagnetic coupling, Shielding, Diffusion, Wire coupling.

If you're looking for a clear, comprehensive overview of basic electromagnetics principles and applications to antenna and microwave circuit design for communications, this authoritative book is your best choice. Including concise explanations of all required mathematical concepts needed to fully comprehend the material, the book is your complete resource for understanding electromagnetics in current, emerging and future broadband communication systems, as well as high-speed analogue and digital electronic circuits and systems.

The definitive text on microwave ring circuits-now better than ever For the past three decades, the ring resonator has been widely used in such applications as measurements, filters, oscillators, mixers, couplers, power dividers/combiners, antennas, and frequency-selective surfaces, to name just a few. The field has continued to expand, with many new analyses, models, and applications recently reported. Microwave Ring Circuits and Related Structures has long been the only text fully dedicated to the treatment of ring resonators. The second edition has been thoroughly revised to reflect the most current developments in the field. In addition to updating all the original material, the authors have added extensive new coverage on: * A universal model for both rectangular and circular ring configurations * Applications of ring structures for all types of planar circuits * A new transmission line analysis * An abundance of new applications in bandpass and bandstop filters, couplers, oscillators, and antennas While retaining all the features that made the original text so useful to both students and teachers in the field, the second edition seeks to introduce the analysis and models of ring resonators and to apply them to both the old and the new applications, including microstrip, slotline, coplanar waveguide, and waveguide transmission lines. Based on dissertations and papers published by graduate students, scholars, and research associates at A&M University, Microwave Ring Circuits and Related Structures, Second Edition is sure to be a valuable addition to both engineering classrooms and research libraries in the field.

Unique, multi-level textbook is adaptable to introductory, intermediate, and advanced levels This revolutionary textbook takes a unique approach to electromagnetic theory, comparing both conventional and modern theories. It explores both the Maxwell-Poynting representation as well as the Alternate representation, which the author demonstrates is generally simpler and more suitable for analyzing modern electromagnetic environments. Throughout the text, students and researchers have the opportunity to examine both of these theories and discover how each one can be applied to solve problems. The text is divided into four parts: Part I: Basic Electromagnetic Theory includes Maxwell's equations, quasistatics, power and energy, stress and momentum, and electromagnetic wave theorems and principles Part II: Four-Dimensional Electromagnetism includes four-dimensional vectors and tensors and energy-momentum tensors Part III: Electromagnetic Examples includes statics and quasistatics, accelerating charges, plane waves, transmission lines, waveguides, antennas and diffraction, and ferrites Part IV: Backmatter includes a summary, appendices, and references Designed to accommodate a broad range of interests and backgrounds, the text's companion DVD enables readers to reconfigure the material as an introductory-, intermediate-, or advanced-level text. Moreover, the text and its DVD offer a broad range of features that make it possible for readers to quickly grasp new concepts and apply them in practice: Practice problems provide the opportunity to solve real-world problems using electromagnetic theory Forty animations illustrate electric and magnetic field transients Line drawings and computer-generated mathematical figures clarify complex concepts and procedures. Maxima, a powerful symbolic mathematics program, helps readers explore four-dimensional electromagnetic theory as well as perform numerical and graphical analyses Adaptable to multiple levels, this text can be used for both undergraduate and graduate coursework. It is also recommended as a reference for researchers in such fields as electrical engineering, laser physics, materials science, and biomedical engineering.