Broadening the cloaking bandwidth with non-Foster metasurfaces.
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.
The University of Texas at Austin, Department of Electrical and Computer Engineering, Austin, Texas 78712, USA.
Pai-Yen
PY
Chen
The University of Texas at Austin, Department of Electrical and Computer Engineering, Austin, Texas 78712, USA.
Christos
C
Argyropoulos
The University of Texas at Austin, Department of Electrical and Computer Engineering, Austin, Texas 78712, USA.
Andrea
A
Alù