Contribución al análisis y diseño de circuitos de microondas y antenas mediante el método de elementos finitos y el uso de puertas no planas

Abstract

In this Ph. D. Thesis, a revision of the characteristics of substrate integrated waveguide and the hybrid software tool is carried out. After that, a new fast and efficient formulation for the analysis and design of microwave circuits based on substrate integrate waveguide is presented. The formulation is then expanded to analyze and design antenna arrays fed by substrate integrated waveguide. Finally, the formulation is modified to obtain extremely low iteration times in a complete design process. The final modification is used to perform the optimization process of a slot array fed by substrate integrate waveguide. This antenna is designed to operate at 17 GHz. Two of the final optimized designs are manufactured and experimentally characterized, testing the formulation capability to produce realizable designs. The new expanded formulation is used to perform a study of microstrip patch antennas backed by metallic cavity. The purpose of this study is to find the minimum required number of metallized via holes to obtain a traditional metallic cavity effect. A complete process design of a 1 to 4 power divider, based on substrate integrated waveguide, is also performed using the expanded formulation. Other possible waveguide technologies where the developed formulation can also be employed are discussed. The work is completed with a study of transition from planar technology to substrate integrated waveguide.