The Antenna Current Green´s Function Formalism—Part II

The main focus in Part II is on understanding the interrelations between the three modes of operations defined in Part I. Using a field reciprocity theorem, we prove that the receiving mode characteristics (Mode C) can be given fully in terms of suitable transmitting mode data (Mode A). We then utilize a theory of the antenna near field developed recently by the authors to analyze the relations between Mode A and Mode B on one hand, and Mode B and Mode C on another hand. The final outcomes of these investigations include the explication of the general interaction mechanisms between two objects placed in the near-field zone of each others. It turns out that simple geometrical transformations, rotations and/or translations plays prominent role in the manner in which electromagnetic interactions take place. Our methods generalize and extend the conventional network theory, which was developed originally using temporal Fourier techniques, but this time taking into account the spatial structure of the antennas and devices operational within the system and the manner in which they interact with the spectral components of the signals injected and circulating within them.