This Thesis will apply the multimodal theory to the design of microwave band-pass filters that will be implemented in uniplanar CPW technology.

The work proposed on this master thesis has its background in the multimodal theory, in which coplanar waveguides structures propagate more than one fundamental mode: the even and the odd mode, and it’s the iteration between these two modes that allows to achieve this new circuit concept. Since this is a relative new technology there are not many filter proposals and the focus of this MT is the development of low-loss and selective bandpass filters. During this work multimodal filters showed a very good response and made possible to create very compact designs that could be implemented in small devices. Furthermore these types of filter presented a way of rejecting harmonic frequencies, making them offer a good response over a wide band of frequencies.