Andrzej Kraszewski, born in Poznan, Poland, received the B.Sc. and M.Sc. degrees in electrical engineering from the Technical University of Warsaw, and the D.Sc. degree in technical sciences from the Polish Academy of Sciences, Warsaw. In 1953, he joined the Telecommunications Institute, Warsaw, where he conducted research and development on microwave systems and components. In 1963, he joined UNIPAN Scientific Instruments, a subsidiary of the Polish Academy of Sciences, as Head of the Microwave Laboratory. In 1972, he became the Manager of the Microwave Department of WILMER Instruments and Measurements, a subsidiary of the Polish Academy of Sciences in Warsaw, where he developed microwave instruments for moisture content measurement and control. Beginning in November 1980, he was a Visiting Professor at the University of Ottawa, Ontario, Canada, where he did research on RF and microwave dosimetry. In January 1987, he joined the USDA research effort at the Russell Research Center on dielectric properties measurements and moisture sensing in grain and other products by electromagnetic fields.

Dr. Kraszewski had been a member of Sigma Xi, the Institute of Electrical and Electronics Engineers (IEEE), the International Microwave Power Institute, the Materials Research Society, the New York Academy of Sciences, and the Polish Electricians Association (SEP). He was a guest editor and member of the editorial board for the Journal of Microwave Power and the IEEE Transactions on Microwave Theory and Techniques, and served as a reviewer and referee for these and many other journals. He organized the initial, second, and third international conferences on interaction of electromagnetic waves with water and moist substances. He received several professional awards, among them the State Prize in Science in Poland in 1980. In 1996, he was named a Fellow of the IEEE and recognized “for contributions to the science of microwave measurements and the development of microwave techniques for measuring water content in moist substances and permittivity, density, and mass of particulate dielectric materials.”

Andrzej Kraszewski’s contributions to microwave science and engineering were substantial and wide ranging. They included the development of microwave gas switching devices, microwave filters, duplexers, ferrite devices and other waveguide components and measurement techniques for their evaluation. He was prominent in the development of measurement systems for the determination of dielectric properties of numerous moist materials such as margarine, fertilizers, grain, and cement slurries, and in the development of microwave instruments to facilitate industrial measurement of moisture content in these materials. He contributed to the development of measurement techniques for in-vivo and in-vitro permittivity measurements in various animal tissues and in materials simulating the properties of human tissues for dosimetry studies, which he carried out on full-scale models of the human body. He worked with dielectric mixture equations and developed mathematical models for the permittivity of cereal grains. He studied microwave resonant cavities for application to sensing moisture content and mass of objects of uniform and arbitrary shapes. He developed free-space measurement techniques for the dielectric properties of cereal grains and oilseeds and evaluated the usefulness of densityindependent microwave sensing of moisture content and bulk density for on-line monitoring of moisture content in grain and other particulate materials.