Reconfigurable liquid crystal reflectarray with extended tunable phase range

A coupled microstrip structure is investigated consisting of three fingerlike patches which are designed for liquid crystal technology. A unit cell based on the coupled structure is realized and characterized with a waveguide simulator. The proposed structure has a measured tunable phase range of 58...

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Bibliographic Details
Main Authors: Bildik, Saygin, Dieter, Sabine, Fritzsch, Carsten, Frei, Michael, Fischer, Christoph, Menzel, Wolfgang, Jakoby, Rolf
Format: Conference Proceeding
Language:English
Subjects:
Antenna measurements
Arrays
Feeds
Liquid crystals
Substrates
Voltage measurement
Online Access:Request full text
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Summary:A coupled microstrip structure is investigated consisting of three fingerlike patches which are designed for liquid crystal technology. A unit cell based on the coupled structure is realized and characterized with a waveguide simulator. The proposed structure has a measured tunable phase range of 582°. It is used as an antenna element to design a reconfigurable reflectarray. The realized antenna is composed of 16×16 elements, and a slotted substrate integrated waveguide is used to illuminate it. Antenna patterns for desired main beam directions are synthesized at W-band with a developed Particle Swarm Optimization algorithm. Beam steering capability of the reflectarray is presented by steering the main beam to various angles applying the bias voltages obtained from the optimization algorithm.