Estudo e aplicação de guias de ondas integrados ao substrato em frequências de micro-ondas.

Abstract

This research work presents a detailed study about substrate integrated waveguide (SIW) operating in microwave frequencies based on rectangular waveguides (RWG) theory. The study about SIW associates equations presented at the literature and uses electromagnetic simulations to develop a well-defined design procedure. Is considered the integration between substrate integrated waveguides and microstrip line, designing transitions between these two structures with the aim to provide impedance matching and make possible the characterization in microwave . Is shown a sensibility analysis of the waveguides and filters performance in SIW technology to evaluate the layout differences caused by manufacturing process.With the experimental results and simulation results was possible validate the design procedures and the manufacturing process of the SIW circuits operating in microwave frequencies.

Design of an Antipodal Vivaldi Antenna Using RSIW Technology

“…(6) The tapers were designed with the width of the input port fixed to the width of the microstrip transmission line. For taper length (L1), multiples of λ/4 should be used to minimize return loss and the width of the exit port (W1) is calculated by ( 7) [14]. The (L1) value was initially λ/4, but for a better impedance matching the value used was 6.4 mm.…”