RADIO AND MICROWAVE

Author: DOMÍNGUEZ TORTAJADA ELSA.
Year: 2005.
University: POLITÉCNICA DE CARTAGENA [www.upct.es].
Place of defense: UNIVERSIDAD POLITÉCNICA DE CARTAGENA.
Place of preparation: UNIVERSIDAD POLITÉCNICA DE CARTAGENA..

Summary: The content of the thesis is focused on the optimization of individual system designs for microwave heating cn intended to bring about improvements in the performance and quality of the processes. In industrial applications warming is very valuable in getting designs efficient needs implementing them physically in search of offering better benefits, because economically it is impossible. It is therefore important to use optimization tools together with electromagnetic simulators that offer us the opportunity to undertake research in this regard. The two goals addressed in the thesis are adapting the magnetron to the load and uniform electric field on the sample to be heated. These two objectives are particularly interesting because microwave heating of them depends the efficiency of porceso and quality of treated products. First, an analysis of the characteristics of dielectric heating and design of a system of microwave heating, which includes a state of the art of the methods used to achieve alignment and streamlining field persecuted. Following is the technical optimization, Generic Algorithms, which display features suitable for electromagnetic design. The optimizer will therefore explore space solutions for the design parameters that meet the objective proposed in each case. This establishes a communication with an electromagnetic simulator business to report the information necessary to determine the suitability of each model. To make the system as real as possible, have been seen samples of different materials, all of them susceptible to treatment with microwaves and also have been used different types of cavities and configurations. We analyzed designs muli-alimentación in which they find out the optimum position of the guides that feed the cavity, feeding systems compounds slots when it optimizes its position, orientation and even dimensions. On the other hand, he examines the possibility to surround the sample to be heated with different dielectric layers that are optimized in thickness and properties. Lastly, seplantea inserting elements inside the cavity of a different size and material, which is also optimized for the objectives outlined above. All these designs are optimized to achieve each goal adaptation and field uniformity and results have been achieved remarkably satisfactory. Then a specific design, which investigates food with a guide, has been optimized to achieve several goals simultaneously. In this case the solution found is the result of a compromise between all of them. Despite the successful and proven advantages of using microwave heating, some industries have not yet decided to replace its traditional heating systems. This argument allows demonstrate that it is possible to design systems to meet the goals they want and thus may encourage the widespread use of microwaves in the myriad of potential applications that can be introduced.