US Patent 10027006 Integrated multi-band bandpass multiplexer based on dielectric resonators

Various embodiments of an integrated multiband bandpass apparatus based on concentric dielectric ring resonators includes one or more radio frequency (RF) input transmission lines for receiving multi-band RF signals, multiple RF output transmission lines for receiving and transmitting multiple single-band RF signals, and a set of dielectric ring resonators coupled in between. The disclosed integrated multi-band bandpass apparatus based on dielectric ring resonators can support at least two operation modes, i.e., a multi-band bandpass filtering mode when used in one direction and a multi-band bandpass multiplexing mode when used in an opposite direction. When operating in the multi-band bandpass filtering mode, the multiple dielectric ring resonators can be used to simultaneously filter multi-band RF signals into multiple single-band bandpass signals. When operating in the multi-band bandpass multiplexing mode, the dielectric ring resonators can be used to multiplex multiple single-band bandpass signals into a multi-band RF signal.