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.

Annular Reconfigurable Metasurface for Omnidirectional Dual-Pol Leaky-Wave Antennas / Baccarelli, Paolo; Burghignoli, Paolo; Comite, Davide; DI RUSCIO, David; Galli, Alessandro; Lampariello, Paolo; D. R., Jackson. - ELETTRONICO. - (2013), pp. 1834-1835. ((Intervento presentato al convegno 7th European Conference on Antennas and Propagation (EuCAP) tenutosi a Gothenburg, SWEDEN nel APR 08-12, 2013.

Annular Reconfigurable Metasurface for Omnidirectional Dual-Pol Leaky-Wave Antennas

BACCARELLI, Paolo;BURGHIGNOLI, Paolo;COMITE, DAVIDE;DI RUSCIO, DAVID;GALLI, Alessandro;LAMPARIELLO, Paolo;
2013

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/517153
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