Methods of Electromagnetic Field Analysis

N T H E last f e w y e a r s e n g i n e e r i n g a p p l i c a t i o n s of e l e c t r o m a g n e t i c field theory have been greatly expanded. Field theory has become essential for the solution of m a n y practical problems and in planning engineering experiments. N e w a p p l i c a t i o n s h a v e i n f l u e n c e d t h e t h e o r y itself a n d h a v e The chasm and between the circuit theory of low the field theory of high-frequency T h i s p a p e r is a discussion of the led t o n e w c o n c e p t i o n s .