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