Broadening the Cloaking Bandwidth with Non-Foster Metasurfaces

Authors

Pai-Yen Chen, University of Texas at Austin
Christos Argyropoulos, University of Texas at AustinFollow
Andrea Alu, University of Texas at Austin

Date of this Version

2013

Citation

PRL 111, 233001 (2013)

Comments

Copyright 2013 American Physical Society

DOI: 10.1103/PhysRevLett.111.233001

Abstract

We introduce the concept and practical design of broadband, ultrathin cloaks based on non-Foster, negatively capacitive metasurfaces. By using properly tailored, active frequency-selective screens conformal to an object, within the realm of a practical realization, we show that it is possible to drastically reduce the scattering over a wide frequency range in the microwave regime, orders of magnitude broader than any available passive cloaking technology. The proposed active cloak may impact not only invisibility and camouflaging, but also practical antenna and sensing applications.