Title :
Planar transmission line method for measurement of dielectric constants of liquid crystals in 60 GHz band
Author :
Bulja, S. ; Mirshekar-Syahkal, D. ; Yazdanpanahi, M. ; James, R. ; Day, S.E. ; Fernandez, F.A.
Author_Institution :
Sch. of Comput. Sci. & Electron. Eng., Univ. of Essex, Colchester, UK
Abstract :
Recent characterizations of liquid crystal (LC) materials invariably use magnetic field for biasing LC. In this paper a transmission line method is proposed for the characterization of the dielectric properties of LC in the 60 GHz band, using electric field bias. In this method a balanced strip line is used to accommodate the LC sample. To facilitate the application of the electric field to the LC and to ease the measurement of the scattering parameters, a unique transition from the balanced strip line to the finite ground coplanar waveguide (FGCPW) is developed. The LC investigated in this paper is the E7 mixture.
Keywords :
coplanar waveguides; liquid crystals; permittivity; strip lines; transmission line theory; balanced strip line; dielectric constant measurement; electric field bias; finite ground coplanar waveguide; frequency 60 GHz; liquid crystal materials; magnetic Held; planar transmission line method; Dielectric constant; Dielectric liquids; Dielectric measurements; Liquid crystals; Magnetic field measurement; Magnetic liquids; Magnetic materials; Planar transmission lines; Strips; Transmission line measurements; CPW; Dielectric anisotropy; balanced stripline; liquid crystals; via interconnect;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5385377
