Diseño de resonadores y circuitos de microondas impresos en 3D

Abstract

The aim of this final degree project is the design, simulation, 3D printing and measurement of a resonator based on the resonant cavity of rectangular waveguides that serve for the implementation of filters, oscillators, frequency meters and other devices needed in telecommunication systems. The resonator is designed for the Ku frequency band, which encompasses the range of frequencies between 12 and 18 GHz. The electromagnetic simulation software HFSS (High Frequency Structure Simulator) is used for the design and simulation of the resonant structure. The DLP printer MONO2 3D is used for 3D printing the piece in resin. After that the piece is metallized and pasted with copper tapes. In this way, it is turned into a prototype of a home resonator. As the metallization method applied to this piece is not suitable, it is not possible to check its practical operation. For this reason, an FDM printer is used to perform another 3D printing of the resonant structure with the ABS material. Lately electroplating with nickel is applied to metallize the printed piece and turn it into a homemade prototype. Finally, its operation is checked with the ROHDE & SCHWARZ ZVA 24 vector analyzer and the theoretical result is compared with the practical one. With the measures it is possible to calculate the quality factor that, as was evident, the theoretical or simulated real case gets much worse after printing and metallizing it.