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Radiation and Propagation of Electromagnetic Waves from Moving Sources
Author(s) -
Lewis Robert M.,
Pressman Walter
Publication year - 1966
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/rds1966191029
Subject(s) - electromagnetic radiation , electromagnetic field , physics , representation (politics) , point (geometry) , maxwell's equations , wave propagation , mathematical analysis , classical mechanics , radiation , field (mathematics) , mathematics , optics , geometry , quantum mechanics , politics , political science , law , pure mathematics
The electromagnetic field produced by a general point source moving on an arbitrary trajectory an infinite homogeneous medium is obtained by solving an initial value problem for Maxwell's equations. The solution is expressed parametrically with the aid of bicharacteristics or space‐time rays. This representation, which is equivalent to the more common “retarded time” representation is used because it clarifies the space‐time geometry of the solution. For the case of a moving charge, the solution reduces to a standard result. In a sequel, the results obtained will be applied to the problem of radiation and propagation of electromagnetic waves produced by point sources moving in an inhomogeneous medium.