Title :
Microwave Characterisation of MgTe2O5 using quasi TE0np Mode Dielectric Resonator Technique
Author :
Jacob, M.V. ; Subodh, G. ; Sebastian, M.T. ; Krupka, J. ; Mazierska, J. ; Bialkowski, M.
Author_Institution :
Sch. of Eng., James Cook Univ., Townsville, QLD
Abstract :
The dielectric characterization of dielectric material at microwave frequencies is a challenging problem. In this paper the complex permittivity of MgTe2O5 dielectric material has been measured as a function temperature and frequency employing few higher order quasi TEOnp modes excited in a disc shape sample. The loss tangent varies between 2.1 x 10-4 and 4.5 x 10-4 in the frequency range 9 GHz and 25 GHz and 1.1 x 10-4 and 4.3 x 10-4 in the temperature range 15 K and 295 K. Measured samples of MgTe20; exhibited exceptionally high and reversible dependence of the dielectric losses on the humidity and can be used as humidity sensors.
Keywords :
dielectric resonators; humidity sensors; magnesium compounds; microwaves; permittivity; MgTe2O5; dielectric resonator; humidity sensors; microwave frequencies; permittivity; Dielectric loss measurement; Dielectric materials; Dielectric measurements; Frequency measurement; Humidity; Microwave frequencies; Permittivity measurement; Shape measurement; Temperature dependence; Temperature sensors;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4555090
