The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A 50.22 × 48.6 mm beam-scanning reflectarray based on liquid crystals (LCs) has been designed to operate over a bandwidth of 5.5% in the low THz frequency range. The structure consists of a single-layer multi-resonant periodic array with unit-cells composed of three parallel unequal length dipoles. The gap between the array and ground plane is filled with electronically tunable LC which exhibits a...
An electromagnetic modeling has been presented for an accurate analysis of reconfigurable reflectarray cells based on liquid crystals (LC). The proposed modeling considers both the inhomogeneity and anisotropic effects, which are calculated by using a simplified molecular model for the behavior of the LC when it is excited by an electrostatic field. The inhomogeneity of the LC is analyzed by dividing...
In this paper we present an overview of liquid crystal based reflectarray technology which has been developed over the past five years at Queen's University Belfast, Universidad Politecnica de Madrid and Universidad de Oviedo. This new active control strategy requires precise characterisation of the permittivity, dielectric anisotropy and loss tangent of the liquid crystals. The electrical parameters...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.