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The paper deals with the modelling, practical implementa- tion and characterization of a directional antenna controllable through 360 - in the (2{2.5GHz) frequency band. The antenna is composed of a central omnidirectional broadband monopole feed surrounded by a metamaterial made of one or two controllable layers of metallic strips printed on a dielectric substrate, which can be electrically continuous or discontinuous. Following the electrical state of these strips, the metamaterial can be re∞ective or transparent. Then by controlling the distribution of re∞ective and transparent regions of the latter metama- terial around the central feed, a directional emission having an angular beamwidth lower or equal to 60 - and controllable through 360 - is pro- duced in the UMTS and WIFI frequency bands, demonstrating the wideband operation of this antenna.

COMPACT BASE STATION ANTENNAS USING METAMATERIALS