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เนื้อหาย่อ : Although most electrical engineering curricula begin with a study of electric cir- cuits, it is now recognized that the more basic theory of the electric and magnetic felds deserves subsequent attention in the curriculum. Some familiarity with circuit oncepts as well as a knowledge of calculus allows a treatment of field theory the junior year that proceeds through Maxwell's equations and justifies the approximations leading to circuit theory. This textbook uses Maxwell's equations as the central theme. These equations developed from the historical approach in which the relevant experimental s are gradually introduced and manipulated with the help of a steadily in- sing knowledge of vector calculus. Maxwell's equations are identified as they ur, even as they apply to static fields, and a certain sense of accomplishment perhaps even familiarity should be felt when the theory is finally completed. Several applications of these equations are described in the final chapters, including ave motion, skin effect, transmission-line phenomena, circuit theory, and the resonant cavity. A first look at radiation and antennas is also included. The material is more than adequate for a one-semester course. Depending on instructional level, it may be desirable to omit portions of the chapters on perimental mapping methods, the solutions of Laplace's equation, transmission , or the application of Maxwell's equations. This book has been written with the goal of making it as easy as possible the student to learn independently. This has been done by applying a care- graduated scale of difficulty within each chapter and among the chapters selves, by providing numerical examples wherever possible and numerous ples interpreting and applying every basic result, and by including a large ber of drill problems with answers. Excessive reliance upon analytic and vector etry and their involvement with interpreting fields has been avoided. The more difficult material has been placed near the ends of the chapters ar at the end of the study of some definite phase of the subject. The slower student, cannot assimilate the same amount of material as a faster one, will thus be