Novel filter design on organic single-layer and ceramic multi-layer substrates

Abstract

The advancement of modern communication systems such as satellite broadcasting and cellular phone networks has accelerated the evolution of new filter designs as well as techniques with emphasis in compactness and ease of design. Some new ideas in the form of filter perturbation structures were investigated and analysed in this thesis. They included a Butterfly Radial Stub (BRS) and a Local Ground Defect (LGD), which can be used for miniaturization purposes as well as the perturbation elements in dual mode filter designs. A filter using the Low-temperature Cofired Ceramics (LTCC) was also realized and measured. It demonstrated the prospect of leveraging the potential of compact multilayer packaging.