Radiation Mechanism of Perfectly Conducting Antennas -- An Interpretation Using Nukiyama's Vector.

A problem inherent in discussing the antenna radiation mechanism is that the electromagnetic energy flux density can not be deterministically defined. The practice has been to interpret the Poynting vector as the flux density vector and to use it to explain the various phenomena. In this paper, as the equivalent of the Poynting vector, the Nukiyama vector derived from the energy theorem is interpreted as the flux density vector. This interpretation is applied to the radiation mechanism of a perfectly conducting antenna, and it is shown that the radiation can be explained as "an exchange of energy between the electromagnetic wave radiated into space and the conductor on which the power is impressed, with the energy exchange taking place as the energy transverses the conductor." It is also shown that the new concept of locally-stored energy derived from Nukiyama's vector for use in this exposition is a broad concept which also encompasses the representation of observable stored energy as defined by Rhodes. [ABSTRACT FROM AUTHOR]