Perhaps what throwaway8198 is referring to are the practical consequences of Maxwell's laws as formulated by an American team in the 1960s [1]. For a thorough, more recent study, I highly recommend [2].

[1] https://en.wikipedia.org/wiki/Chu%E2%80%93Harrington_limit

[2] http://web.eng.ucsd.edu/ece/courses/ECE222D/Spring2013/Lectu...