This work provides design and analysis of a beam steering reflectarray antenna, designed at
26 GHz, based on the mechanical rotation of the array. Unit cells based on circular ring …

The application of varactor diodes as phase-shifting devices in reflectarrays has received
considerable attention because it represents a low-cost and low-complexity solution for the …

A multi-resonant unit-cell based on liquid crystals is proposed for reconfigurable reflectarray
antennas. The proposed reflectarray element is made up of three parallel dipoles in the …

This work provides design and characterization of millimeter wave reflectarray antenna
based on unit cells as well as periodic reflectarray design at 26 GHz. Diverse unit cell design …

An overview about some of the recent Spanish developments on active reflectors is
presented. In the first part, a novel beamsteering active reflectarray is deeply studied. It is …

This paper investigates the realization of reconfigurable reflectarrays based on tunable
liquid crystals (LC). Two different concepts of unit cells using highly anisotropic LC have …

This letter presents a new phase-shifting cell topology for dual linearly polarized
reflectarrays. It consists of two orthogonal sets of straight slots etched in a metallic plane and …

This paper presents the study, relization, and mea-surement of diferent tunable unit-cells for
reconfigurable reflectarrays at 35 GHz. The emphasis of the work lies in the use of nematic …

In this work we demonstrated a tunable planar inverted-F antenna (PIFA) for the correction of
impedance mismatch resulting from the resonant frequency shift in the usage of mobile …

It is known that varactor diodes can be used as phase shifting devices by varying the reverse
voltage applied to it to change its capacitance. This can be utilized to achieve the realization …