About the session
Chairs: Raj Mittra (Penn State University, USA), Ala Sharaiha (Université de Rennes 1 & IETR, France)
Under far-field conditions, the transmission of electromagnetic waves is commonly described by the Friis transmission equation. Wave propagation effects can be included by ray concepts together with appropriate phase terms. Motivated by the needs of near-field antenna measurements, we will look into a couple of near-field antenna transmission equations, where we will find that spectral formulations of such transmission equations are commonly advantageous in terms of physical insight and numerical treatment. A very flexible and numerically advantageous near-field transmission equation works with spectral propagating plane wave representations and it is found that this equation is nothing else than a near-field generalization of the Friis transmission equation. Based on this transmission equation, we will formulate antenna field transformation algorithms and we will show the performance of such algorithms for field transformations in complex environments, where reflection and scattering effects are involved or where only near-field measurements without phase information are available.
