Theory of Nonsinusoidal Small Antennas with Applications to Near-Field
Communication System Analysis and Design
Abstract
We provide a conceptual and theoretical analysis of nonsinusoidal
antennas with emphasis on how electromagnetics and communication
theories can be integrated to propose ideas for near-field (NF)
communications systems utilizing future antennas. It is shown through
rigorous analysis that in nonsinusoidal antennas it is possible to
derive and solve ordinary differential equations giving specialized
time-domain excitation signals that lead to exact cancellation of the
near field at specific radiation spheres. This opens the door to
building NF communications systems with far-field-like communication
receiver infrastructures utilized if the receive antenna is placed at
the special sphere where the NF component is made to vanish.