DocumentCode :
2423973
Title :
Measurement of the dielectric properties of dispersive materials over a wide frequency range
Author :
Bacon, L.D. ; Lehr, J.M. ; Molina, L.L. ; Salazar, R.A.
Author_Institution :
Sandia Nat. Labs., Albuquerque, NM, USA
fYear :
2003
fDate :
19-22 Oct. 2003
Firstpage :
526
Lastpage :
529
Abstract :
The propagation of electromagnetic waves through dispersive media forms the basis for a wide variety of applications. Rapid advances in materials have produced new products with tailored responses across frequency bands. Many of these new materials, such as radar absorbing material and photonic crystals, are dispersive in nature. This, in turn, has opened up the possibility for the exploitation of these dispersive dielectric properties for a variety of applications. Thus, it is desirable to know the electromagnetic properties of both man-made and natural materials across a wide frequency range. With the advent of transient pulsers with sub-nanosecond risetimes and rates of voltage rise approaching 10**16 V/s, the frequencies of interest in the transient response extend to approximately the 2 GHz range.. Although a network analyzer can provide either frequency- or time- domain data (by inverse transform), common TEM cells are only rated to 0.5 to 1.5 GHz - significantly below the maximum frequency of interest. To extend the frequency range to include 2 GHz, a TEM cell was characterized and a deembedding algorithm was applied to account, in part, for the limitations of the cell. The de-embedding technique is described along with such measurement issues such as clear time and sneak around. Measurements of complex permittivity of common drinking water are shown. This frequency extension will lead to more expansive testing of dielectric materials of interest.
Keywords :
dielectric materials; disperse systems; electromagnetic wave propagation; permittivity; transient response; clear time; common drinking water; complex permittivity; de-embedding technique; dielectric properties; dispersive dielectric properties; dispersive materials; electromagnetic properties; man-made materials; natural materials; network analyzer; photonic crystals; radar absorbing material; rates of voltage rise; sneak around; sub-nanosecond risetimes; tailored responses across frequency bands; transient pulsers; transient response; wide frequency range; Crystalline materials; Dielectric materials; Dielectric measurements; Dispersion; Electromagnetic measurements; Electromagnetic propagation; Electromagnetic propagation in absorbing media; Frequency measurement; Permittivity measurement; TEM cells;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2003. Annual Report. Conference on
Print_ISBN :
0-7803-7910-1
Type :
conf
DOI :
10.1109/CEIDP.2003.1254908
Filename :
1254908
Link To Document :
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