An efficient approach for obtaining an active high impedance surface (HIS) is presented. The novel design allows us to synthesize a tunable HIS by drastically reducing the number of the active elements employed. The conventional loading of a single varactor for each of the unit cells of the frequency selective surface (FSS) is overcome by connecting the FSS unit cells to a feeding network located behind the ground plane through metallized vias. A waveguide demonstrator of the proposed structure has been designed, realized, and tested. In the example shown herein, the feeding network allows us to apply a single varactor to a group of eight cells in order to obtain a tunable HIS.

Tunable High-Impedance Surface with a Reduced Number of Varactors

COSTA, FILIPPO;MONORCHIO, AGOSTINO;
2011-01-01

Abstract

An efficient approach for obtaining an active high impedance surface (HIS) is presented. The novel design allows us to synthesize a tunable HIS by drastically reducing the number of the active elements employed. The conventional loading of a single varactor for each of the unit cells of the frequency selective surface (FSS) is overcome by connecting the FSS unit cells to a feeding network located behind the ground plane through metallized vias. A waveguide demonstrator of the proposed structure has been designed, realized, and tested. In the example shown herein, the feeding network allows us to apply a single varactor to a group of eight cells in order to obtain a tunable HIS.
2011
Costa, Filippo; Monorchio, Agostino; Vastante, Giuseppe
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/149723
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