Title :
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
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;
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
DOI :
10.1109/ISAF.2015.7172700
