Title :
Accuracy improvement in permittivity measurement of construction materials by use of a model of the standing wave method in free space
Author :
Miyakawa, Michio ; Yaguchi, Kenichi ; Ishii, Nozomu ; Saeki, Tatsuhiko ; Kanai, Yasushi
Author_Institution :
Fac. of Eng., Niigata Univ., Japan
Abstract :
A model of the measuring system has been developed to estimate accurately the complex permittivity of construction materials based on the standing wave method in free space. It is assumed in the model that the standing wave distribution is represented by the sum of the incident-, reflected- and scattered-wave components. In this paper, the measurement conditions of the model based measuring method have been discussed by means of computer simulation using FDTD techniques. It has been concluded that the size of the materials should be larger than 600 millimeters square in order to estimate complex permittivity accurately by the model based method.
Keywords :
digital simulation; electrical engineering computing; finite difference time-domain analysis; least squares approximations; permittivity measurement; FDTD techniques; complex permittivity; computer simulation; construction materials; free space; least-squares method; measuring system model; model based method; permittivity measurement; standing wave method; Biological materials; Building materials; Circuit testing; Distortion measurement; Equivalent circuits; Extraterrestrial measurements; Impedance measurement; Materials testing; Permittivity measurement; Scattering;
Conference_Titel :
Electromagnetic Compatibility, 2002. EMC 2002. IEEE International Symposium on
Conference_Location :
Minneapolis, MN, USA
Print_ISBN :
0-7803-7264-6
DOI :
10.1109/ISEMC.2002.1032699
