CBL - Campus del Baix Llobregat

Projecte llegit

Títol: Síntesi i disseny de filtres SAW

Estudiants que han llegit aquest projecte:

Director/a: MATEU MATEU, JORDI

Departament: TSC

Títol: Síntesi i disseny de filtres SAW

Data inici oferta: 05-02-2025     Data finalització oferta: 05-10-2025


Estudis d'assignació del projecte:
    GR ENG SIST AEROESP
Tipus: Individual
 
Lloc de realització: EETAC
 
Segon director/a (UPC): COLLADO GÓMEZ, CARLOS
 
Paraules clau:
Filtres electroacústics, Espai, L-Band, Surface Acoustic Wave (SAW), Simulació electromagnètica,
 
Descripció del contingut i pla d'activitats:
Fer la sintesis i disseny de un duplexor amb tecnologia SAW per aplicacions de espai. S'utilitzarà descripció matemàtica de la funció de transferència per fer la síntesi i eines circuitals per procedir amb el disseny. Simulacions electromagnètiques també formaran part del disseny que proporcionarà dimensions finals.
 
Overview (resum en anglès):
This project focuses on the development of a complete design and modeling process for Surface Acoustic Wave (SAW) filters intended for satellite communication systems. These devices are characterized by their high efficiency in the L-Band, a frequency band used for space applications, specifically in the SMOS (Soil Moisture Ocean Salinity) mission, while maintaining a compact size.

The process begins with the synthesis of the filter network using the FILTRAW® software, which allows obtaining the network based on the lumped-element Butterworth-Van Dyke (BVD) model. Due to its limited ability to reproduce the real behavior of the devices, the distributed Coupling of Modes (COM) model by Nakamura is used, which is capable of linking the electrical behavior with the characteristic physical dimensions.

By means of electromagnetic-circuit co-simulations, the study of the effect of the interconnections between resonators has been carried out, an aspect to be considered in the design of high-order filters.

This entire process has been applied to the design of a third-order (O3) filter already manufactured by a leading company in the electroacoustic filter sector, which has allowed the validation of the procedure. In addition, a new fifth-order (O5) filter has been designed, where the increase in order introduces greater complexity.

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