Between 1950 and 1965, there was a spate of intense activity to
investigate the theory and application of ferrite materials at microwave
frequencies, and in the early 1960s a number of textbooks on the
microwave applications of ferrites were published, but nothing
comprehensive since. Now this book has been written to consolidate all
the investigations of ferrites for microwave applications, to look back
at earlier publications from the viewpoint of a mature technology, and
to bring the story up to date. This book attempts to give all the
structures and applications using ferrites at microwave frequencies that
havebeen investigated or contemplated, using the engineer's rather than
the physicist's approach. It starts with a full mathematical treatment
of the interaction of an electromagnetic wave with a gyromagnetic
ferrite material for simple boundary conditions. These results are then
extended to give a field descriptive approach to describe the mode of
operation of all the different microwave devices.