Title :
Permittivity of highly absorbing oxide ceramics in millimeter waves
Author :
Afsar, Mohammed N. ; Wang, King ; Liu, Peter ; Korolev, Konstantin A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Tufts Univ., Medford, MA
Abstract :
Complex dielectric permittivity of highly absorbing oxide ceramics have been studied in a broadband millimeter wave frequency range for the first time. Transmittance and reflectance measurements have been performed using a free space quasi-optical spectrometer, equipped with a set of high power backward wave oscillators, tunable in Q-, V- and W-frequency bands. Ceramic materials have found to be almost non-transparent (opaque) in millimeter waves with extremely high values of permittivity. Frequency dependences of dielectric permittivity, calculated from precision transmittance and reflectance spectra are presented.
Keywords :
backward wave oscillators; ceramics; lead compounds; permittivity; reflectivity; refractive index; submillimetre wave spectroscopy; Q-frequency bands; V-frequency bands; W-frequency bands; [Pb(Mg0.33Nb0.66)O3-PbTiO3]; broadband millimeter wave frequency range; dielectric permittivity; free space millimeter wave quasi-optical spectroscopy; high power backward wave oscillators; highly absorbing oxide ceramics; reflectance measurements; refractive index; transmittance; Ceramics; Dielectric measurements; Extraterrestrial measurements; Frequency; Millimeter wave measurements; Performance evaluation; Permittivity measurement; Power measurement; Reflectivity; Spectroscopy;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves, 2008. IRMMW-THz 2008. 33rd International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-2119-0
Electronic_ISBN :
978-1-4244-2120-6
DOI :
10.1109/ICIMW.2008.4665659
