[IEEE >2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics - Shanghai, China (2006.09.18-2006.09.22)] 2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics - Dielectric Properties of Common Household Powders at Millimeter Wave and Terahertz Frequencies