IMPI's 48th ANNUAL MICROWAVE POWER SYMPOSIUM (IMPI 48) 2014 PROCEEDINGS
Tthe IMPI 48 program offers topics for everyone interested in learning about the latest developments in microwave power science and technology. Each year, IMPI brings together researchers, technologists and engineers from across the globe to share the latest findings of microwave and radio frequency power systems for non-communication applications, including food technology, chemical and material processing, and new emerging technologies. IMPI 48 Symposium was held at the Doubletree Hotel on Canal Street in downtown New Orleans, Louisiana, USA. New this year, IMPI 48’s Food Science and Technology Program will cover topics such as: microwavable food safety, microbiological testing, product validation, microwave oven standards, microwave leakage monitoring, industrial microwave and RF food processing.
Obtaining even temperature distribution in the volumetric materials with dielectric losses exposed to the microwave radiation was addressed in this work. Two types of radiators, (1) with a rectangular aperture and (2) with a teardrop aperture, were used for heating a multi-layer wooden bar. The temperature disfribution in the bar was measured in the direction of radiation. With a rectangular aperture, the maximum temperature reached inside the bar was at some distance from the surface of the bar facing the radiator. With a teardrop aperture, the maximum temperature was at the surface of the bar facing the radiator. It's expected that an even temperature distribution in a treated object can be obtained by simultaneous using both types of radiators
Wide application of radiofrequency (RF) and microwave (MW) heating of dielectric materials is restrained by the relatively small specific RF losses and inhomogeneity of the MW energy penetration in the treated objects. These disadvantages may be overcome by using applicators based on slow-wave structures which support modes in which the phase velocity is less than the free-space velocity of light These structures concentrate the electromagnetic field relatively homogeneously along the system axis. Diverse applications have been found including food heating, disinfecting agricultural products, and electro-coagulation.