A printed annular reconfigurable metasurface (ARM) comprised of concentric ring slots etched in a metal screen loaded by stubs and varactor diodes is proposed to realize two-dimensional leaky-wave antennas (LWAs) operating on a pair of azimuthally independent TM and TE cylindrical leaky modes. The metasurface, used as a superstrate for a grounded dielectric slab, is designed to achieve wavenumber equalization of the two modes. These are excited independently by means of a vertical coaxial probe and a horizontal microstrip loop, thus allowing for radiation of an omnidirectional conical beam with reconfigurable beam angle and polarization. Theoretical and numerical investigations are presented, including an ad-hoc moment-method approach for the calculation of the antenna far-field patterns.
Baccarelli, P., Galli, A. (2013). Annular Reconfigurable Metasurface for Omnidirectional Dual-Pol Leaky-Wave Antennas. In Proc. EuCAP 2013 (pp.1834-1835). IEEE.
Annular Reconfigurable Metasurface for Omnidirectional Dual-Pol Leaky-Wave Antennas
BACCARELLI, PAOLO;GALLI, ALESSANDRO
2013-01-01
Abstract
A printed annular reconfigurable metasurface (ARM) comprised of concentric ring slots etched in a metal screen loaded by stubs and varactor diodes is proposed to realize two-dimensional leaky-wave antennas (LWAs) operating on a pair of azimuthally independent TM and TE cylindrical leaky modes. The metasurface, used as a superstrate for a grounded dielectric slab, is designed to achieve wavenumber equalization of the two modes. These are excited independently by means of a vertical coaxial probe and a horizontal microstrip loop, thus allowing for radiation of an omnidirectional conical beam with reconfigurable beam angle and polarization. Theoretical and numerical investigations are presented, including an ad-hoc moment-method approach for the calculation of the antenna far-field patterns.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
