Influence of uncertainty in dielectric properties on the design performance of a tunable composite right/left handed leaky wave antenna

Author

Gao, X. ; Jackson, T.J. ; Gardner, P.G. ; Kechik, M.M. ; Jancar, B. ; Ochar, O. ; Belous, A.

Author_Institution

Sch. of Electron., Electr. & Syst. Eng., Univ. of Birmingham, Birmingham, UK

fYear

2015

fDate

24-27 May 2015

Firstpage

182

Lastpage

185

Abstract

Uncertainties of the order of 8 % in the accuracy of lithography used to define co-planar waveguides on ferroelectric thin films lead to a similar uncertainty in the value of relative permittivity of the film extracted from measurements. When such films are used as the tunable elements in a tunable composite right/left handed leaky wave antenna, such variations of the capacitance of the varactors can lead to a reduction in radiation and total efficiency around of the order of 1 dB in 5 dB due to the appearance of a bandgap in the frequency response.

Keywords

capacitance; coplanar waveguides; energy gap; ferroelectric thin films; leaky wave antennas; lithography; permittivity; varactors; bandgap; coplanar waveguides; design performance; dielectric properties; ferroelectric thin films; frequency response; lithography; radiation; relative permittivity; total efficiency; tunable composite right-left handed leaky wave antenna; varactor capacitance variations; Antennas; Films; Microwave theory and techniques; Permittivity; Scattering parameters; Standards; Uncertainty; Permittivity; antenna; characterisation; ferroelectric; uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectric, International Symposium on Integrated Functionalities and Piezoelectric Force Microscopy Workshop (ISAF/ISIF/PFM), 2015 Joint IEEE International Symposium on the

Conference_Location

Singapore

Type

conf

DOI

10.1109/ISAF.2015.7172700

Filename

7172700