David R. Smith

TL;DR: This article presents an alternative application of metasurfaces for wireless communications as active reconfigurable antennas with advanced analog signal processing capabilities for next generation transceivers.

TL;DR: In this paper, the authors derived the expressions for the effective nonlinear susceptibilities of a metacrystal formed from resonant elements that couple strongly to the magnetic field and experimentally illustrate the accuracy and validity of their theoretical framework.

TL;DR: In this paper, a method of directly calculating the magnetoelectric coupling terms using averages over the fields computed from full-wave finite-element based numerical simulations is presented, and the predicted bianisotropy of a fabricated SRR medium is confirmed by measuring the cross polarization of a microwave beam transmitted through the sample.

TL;DR: The authors leverage this functionality to conduct volumetric computational imaging: a deformed cavity is outfitted with tailored, irregular surfaces, and its microwave resonant modes are projected into an imaging domain to retrieve the scene's spatial information.

TL;DR: In this article, a frequency-diverse aperture for microwave imaging based on a planar cavity at K-band frequencies (18-26.5 GHz) is presented. But unlike the metamaterial apertures, the printed cavity imager does not require any mechanically moving parts or complex phase shifting networks.