Liquid Crystal-Based Reconfigurable Reflectarray Antenna Unit Cell Structure with Improved Response Time

Optically reconfigurable unit cell for Ka-band reflectarray antennas

Design of Liquid Crystal Based Tunable Reflectarray Antenna Using Slot Embedded Patch Element Configurations

This paper presents the design and analysis of Liquid Crystal (LC) based tunable reflectarray antenna with different design configurations within X-band frequency range. The effect of LC volume used for unit cell element on frequency tunability and reflection loss performance has been investigated. Moreover different slot embedded patch element configurations have been proposed for LC based tun...

Liquid crystal reflection cell with improved response times.

Design of a Reconfigurable Reflectarray Unit Cell for Wide Angle Beam-Steering Radar Applications

A reconfigurable aperture-coupled reflectarray element is proposed for the realization of beam steering antennas, suitable for radar applications. Each reflectarray element is coupled to a microstrip line, which is loaded by a single varactor diode acting as a phase shifter element, thus providing a continuously variable reflection phase. A reduced size reflectarray unit cell is properly design...

A Varactor Loaded Reflectarray Antenna

A new approach for beam steering in reflectarray applications is introduced in this paper. The progressive phase distribution is achieved by loading each microstrip patch element with a varactor diode on the radiating edges. The scattering characteristics of a single varactor loaded patch will be first presented. Then, as a test of the beam steering capability, a five elements linear reflectarr...