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

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1

Lastpage

3

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APMC.2007.4555090

Filename

4555090