This book is addressed to students in physics, electrical engineering, and applied mathematics who seek a thorough introduction to electromagnetism with emphasis on radiation theory and its applications. It was developed out of lectures and manuscripts by Julian Schwinger prepared during WWII at MIT's Radiation Laboratory, updated with previously unpublished material developed by Schwinger at UCLA in the 1970s and 1980s, and by Milton at the University of Oklahoma since 1994. The book includes a great number of straightforward and challenging exercises and problems. A hardcover edition containing additionally the reprints of more than 15 papers by Schwinger on these topics is available separately.

Provides a thorough introduction to electromagnetism with emphasis on radiation theory and its applications Developed out of trailblazing lectures and papers by the late Julian Schwinger (Nobel Laureate 1965) over four decades, and updated with subsequent findings Contains unpublished material by Schwinger Includes a number of straightforward and challenging exercises and problems

Inhalt
Maxwell's Equations.- Spherical Harmonics.- Relativistic Transformations.- Variational Principles for Harmonic Time Dependence.- Transmission Lines.- Waveguides and Equivalent Transmission Lines.- Rectangular and Triangular Waveguides.- Electromagnetic Fields in Waveguides with Circular Cross Sections.- Reflection and Refraction.- Variational Methods.- Examples of Variational Calculations for Circular Guide.- Steady Currents and Dissipation.- The Impedance Concept in Waveguides.- Accelerators: Microtrons and Synchrotrons.- Synchrotron Radiation.- Diffraction.- Quantum Limitations on Microwave Oscillators.