Multi-function dielectric resonator array for beam scanning and practical bandpass filters with high selectivity

The idea of using a dielectric resonator for dual purposes as a radiating element and a resonator cavity filter has been introduced in 2008. In all the published papers both antenna and filter are kept at a minimalistic level of complexity in such a way that the filtering characteristic is not practical, since the selectivity and the equi-ripple bandwidth don´t match today´s requirements of communication systems. Also the antenna was kept as simple as possible, which is only a single radiating element. In this paper we will introduce a state of the art design based on dual application of dielectric resonators for a beam scanning antenna array and a practical bandpass filter with acceptable selectivity and bandwidth.