Estudio de la propagación Half y Quarter Mode en estructuras SIW y diseño de una antena de doble banda

Abstract

The main goal of this project is to design and build a dual band antenna using SIW (Substrate Integrated Waveguide) technology and QMSIW (Quarter Mode SIW) concept. SIW are planar waveguides created by embedding two rows of conducting cylinders or slots in a dielectric substrate that connect two parallel metal plates. In early 90s began the boom of wireless microwave applications and the main issue was the need for planar components to conventional waveguides transitions, this made the manufacturing very difficult and expensive. SIW preserve the high quality factor and high power capacity of the conventional waveguides and are much easier to integrate into circuits due to its planar form. For many applications SIW are still too wide and to solve this problem the concepts of HMSIW (Half Mode SIW) and QMSIW are born allowing the design of SIW structures with the same properties and half and a quarter of the original size, respectively. A comparative study between conventional waveguides and its equivalent SIW design has been made in this Project. The HMSIW and QMSIW concepts have also been applied on SIW structures. HFSS (High Frequency Structure Simulator) has been used for the design of the structures. ADS (Advanced Design System) has been used to design the matching circuits for the structures and MATLAB to solve equations. Finally the dual band QMSIW antenna is fabricated and measured in an anechoic chamber.