CBL - Campus del Baix Llobregat

Projecte llegit

Títol: Miniaturization of a duplexer implementing BAW technology to its filters

Estudiants que han llegit aquest projecte:

Director/a: MATEU MATEU, JORDI

Departament: TSC

Títol: Miniaturization of a duplexer implementing BAW technology to its filters

Data inici oferta: 07-05-2024     Data finalització oferta: 07-05-2024


Estudis d'assignació del projecte:
    DG ENG AERO/SIS TEL
Tipus: Individual
 
Lloc de realització: ERASMUS
 
Paraules clau:
Acoustic filter, Butterworth-Van-Dyke, Ladder filter, Filter design
 
Descripció del contingut i pla d'activitats:
 
Overview (resum en anglès):
The main area of study of this Bachelor's Thesis are the radio frequency filters. More
precisely, the main objective is to design the filters that will be part of a duplexer for an
environment where space is one of the most important limitations.
The project starts with an overview of the types of filters that currently exist, to see what
are the different possibilities to carry out the design of new filters for the environments with
the previously mentioned limitations.
After that, a more in-depth study of the BAW technology is carried out, which is based on
the use of piezoelectric materials, which can generate acoustic waves if an electrical input
stimulus is applied to them, and vice versa. In addition, this part of the theoretical study
also includes a brief introduction to the concept of acoustic signals in telecommunication
devices, together with the differences between these devices and the traditional ones,
where only electric signals are used.
Also, several measures are carried out on a duplexer created to work on a GSM base
station. From these ones, the different basic requirements for a duplexer will be extracted.
With these specifications obtained, the process of designing different versions of electroacoustic
filters is started, with simulation software to generate the most accurate response
to the requirements obtained to the measurements possible.
Once the theoretical design is obtained with the simulation program, the simulation of the
real implementation is carried out with real dimensions and building materials thanks to a
new program that allows to obtain the responses of the different resonators that conform
the designed filters. With them, new small adjustments are made to generate a response
that allows to comply with the maximum possible specifications of the duplexer that has
been measured.

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