Field and Wave Electromagnetics Adapted Ver. (2版)

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【原文書】 書名：Field and Wave Electromagnetics 2/e (台灣印製版) 作者 : David K. Cheng 出版社：PEARSON ISBN：9789862803165 【中文翻譯書】 書名：電磁學 第二版 原文書名：Field and Wave Electromagnetics 2/E 譯者：李永勳 作者: David K. Cheng 出版社：偉明 ISBN : 9789579899109 目　錄： 1:電磁模型 2:向量分析 3:靜電場 4:靜電問題的解 5:穩定電流 6:靜磁場 7:時變場和馬克斯威爾方程式 8:平面電磁波 9:傳輸線的原理及應用 10:波導管及空腔共振器 11:天線與輻射系統 A:符號與單位 B:一些重要常數 C:圖表索引

Understanding the Electromagnetic Field

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Understanding the Electromagnetic Field is an entry level textbook for graduate students with a focus on the electromagnetic field. This book explores the relationship between the field and electric charges. The earlier part of the book deals with the derivation of Maxwell's equations from experimental laws. Next, the electromagnetic field is studied in the light of special relativity, leading logically to the quantum theory of radiation. Quantum mechanics is introduced as a quantum field theory of the electromagnetic field. The rules of quantum mechanics are developed in a systematic way, with relativistic quantum electrodynamics explaining some puzzles that emerge in classical electrodynamics. A chapter is devoted to the study of angular momentum in quantum mechanics, uniquely showing its importance in the understanding of the interaction between the field and charges. The geometry of the space in which the electromagnetic field is embedded is shown to be significant. General relativity provides a relationship between the geometry of space and the presence of matter. The final chapter is devoted to deriving the fundamental equations of general relativity. Mathematical expressions are derived for the effect of gravity on the electromagnetic field, and measurable results are calculated. The prerequisites of this book are Newtonian physics, calculus and linear algebra. Exercises are provided throughout the book.

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DESCRIPTION LOW ELECTROMAGNETIC FIELD EXPOSURE WIRELESS DEVICES Comprehensive resource covering methods of designing energy efficient and low EMF wireless device techniques Supported with real case studies and recent advancements and laying the foundation for future advancements in the field, Low Electromagnetic Field Exposure Wireless Devices: Fundamentals and Recent Advances describes both ways, i.e. hardware and software, in which the user-centric wireless communication devices can be designed to reduce the levels of EMF to limit the potential long-term effects of EMF on human health. The text covers state-of-the-art and advanced topics such as EMF exposure standards and rationale, EMF evaluation tools, radio resource allocation, energy conservation, energy harvesting, EMF-aware antenna designs, and MIMO, and highlights advancements in this exciting field to date. To aid reader comprehension, the text contains numerous tables, illustrations, and photographs. In Low Electromagnetic Field Exposure Wireless Devices: Fundamentals and Recent Advances, readers can expect to find information on: Fundamentals and key practices, and mechanisms and assessment methods, of exposure to electromagnetic fields The role of the smartphone on the assessment of exposure from 5G and antenna design considerations and techniques for low SAR mobile handsets Numerical exposure assessments of communication systems at higher frequencies and age-dependent exposure estimation using numerical methods Reinforcement learning and device-to-device communication in minimizing EMF exposure and emission-aware uplink resource allocation scheme for non-orthogonal multiple access systems For wireless user equipment designers and hardware engineers, teachers in wireless communications, and postgraduate students in antennas for communication systems, Low Electromagnetic Field Exposure Wireless Devices: Fundamentals and Recent Advances is a must-have resource, covering an important topic that is expected to only grow in significance as future technological developments are made.