Scalar near-field focusing in lossy media

Antenna near-field focusing is a research topic that is recently attracting attention, due to its impact on a wide number of trending applications. In this communication we propose a methodology based on convex optimization to focus the scalar field radiated by planar continuous apertures. The methodology is capable to focus the field inside piecewise stratified media and is supported by an easy-to-implement MATLAB package. In addition, we apply specific optimization goals which render the resulting aperture distributions realizable.

[1]  S. C. Pavone,et al.  Analysis and Design of Bessel Beam Launchers: Longitudinal Polarization , 2016, IEEE Transactions on Antennas and Propagation.

[2]  E. Rajo-Iglesias,et al.  Holographic Surface Leaky-Wave Lenses With Circularly-Polarized Focused Near-Fields—Part I: Concept, Design and Analysis Theory , 2013, IEEE Transactions on Antennas and Propagation.

[3]  T. Isernia,et al.  An effective approach for the optimal focusing of array fields subject to arbitrary upper bounds , 2000 .

[4]  Sebastien Rondineau,et al.  Array Pattern Synthesis With Excitation Control via Norm Minimization , 2016, IEEE Transactions on Antennas and Propagation.

[5]  R. Sauleau,et al.  Enhancing breast cancer imaging at millimeter waves using focusing techniques , 2017, 2017 11th European Conference on Antennas and Propagation (EUCAP).

[6]  J. Sherman.  Properties of focused apertures in the fresnel region , 1962 .

[7]  Sanghoek Kim,et al.  Wireless Power Transfer to Miniature Implants: Transmitter Optimization , 2012, IEEE Transactions on Antennas and Propagation.

[8]  Ronan Sauleau,et al.  3-D Shaping of a Focused Aperture in the Near Field , 2016, IEEE Transactions on Antennas and Propagation.

[9]  K. Michalski,et al.  Multilayered media Green's functions in integral equation formulations , 1997 .

[10]  P. Potier,et al.  On the use of convex optimization for electromagnetic near-field shaping , 2017, 2017 11th European Conference on Antennas and Propagation (EUCAP).

[11]  Lorenzo Crocco,et al.  Constrained power focusing of vector fields: an innovative globally optimal strategy , 2015 .