https://shop.theiet.org:443/author/edmund-k-millerEdmund K. Millerhttps://shop.theiet.org:443/model-based-parameter-estimation-in-computational-electromagnetics<p xmlns="http://ns.editeur.org/onix/3.0/reference">Computational electromagnetics (CEM) involves modeling the interaction of electromagnetic fields with physical objects and their environment, such as the radiation emitted by antennas and the fields scattered from radar targets.</p> <p xmlns="http://ns.editeur.org/onix/3.0/reference">First-principles or generating models (GMs) based on Maxwell's equations, provide a microscopic, spatial description of the charge and current distributions that normally require several samples per wavelength. Model-based parameter estimation (MBPE) uses a macroscopic, reduced-order, physically based fitting model (FM) to adaptively sample GM results while minimizing the number needed to quantify various EM observables such as frequency responses, far-field radiation patterns, interaction effects, etc. The FMs can reduce the needed GM sampling cost by a factor of 10 or more while yielding a continuous result of needed observables to avoid missing important details. The FMs can also indicate the numerical uncertainty of such quantities from measured as well as computed data.</p> <p xmlns="http://ns.editeur.org/onix/3.0/reference">After an introduction to the subject and its mathematical background, subsequent chapters cover system identification, MBPE techniques and the various roles of Prony's methods as FMs in CEM. Other related topics that are covered include derivative sampling, radiation pattern synthesis and estimation, and assorted other applications.</p> <p xmlns="http://ns.editeur.org/onix/3.0/reference">The book is aimed at the computational electromagnetics community and those working in applied sciences with complex models such as acoustics, mechanical structures, geo-physics and physics.</p>Mon, 13 Oct 2025 08:07:04 GMThttps://shop.theiet.org:443/model-based-parameter-estimation-in-computational-electromagneticshttps://shop.theiet.org:443/charge-acceleration-and-the-spatial-distribution-of-radiation-emitted-by-antennas-and-scatterers<p xmlns="http://ns.editeur.org/onix/3.0/reference">Given that charge acceleration is the cause of all electromagnetic radiation, the question arises about where such acceleration occurs on objects typically modelled and analysed by electromagnetic engineers. Charge acceleration, as the cause of radiation from these typical kinds of objects (antennas, radars etc) is examined in this book on a quantitative basis.</p> <p xmlns="http://ns.editeur.org/onix/3.0/reference">The book describes new ways of modelling the actual distribution of EM radiation waves from its various sources. Unlike other books on EM it focuses on radiation, a fundamental property of electromagnetic fields, it does not follow the usual analytical kind of approach to be found in a book on electromagnetics. Rather than developing and presenting a formal theoretical foundation of electromagnetic theory, this book instead focuses on various aspects of EM radiation from a variety of perspectives.</p> <p xmlns="http://ns.editeur.org/onix/3.0/reference">The goal is to provide the reader with computational tools for determining quantitatively why and where radiation is emitted by antennas and scatterers. This is a unique approach which is of wide interest to the EM theoretical community.</p>Mon, 09 Jan 2023 15:48:17 GMThttps://shop.theiet.org:443/charge-acceleration-and-the-spatial-distribution-of-radiation-emitted-by-antennas-and-scatterers