Advanced Wide Band RF Distribution System

We propose to develop the technology to address the need for advanced RF distribution systems (RFDS) that can manage or remove multiple sources of in-band (MF to UHF) and out-of-band interference. Using a combination of superconducting filters, cryogenic low-noise amplifiers, and cryogenic conventional components, EMI tolerance and EMI rejection can be introduced into the RF front end without significantly increasing the noise figure of the system or impacting proper demodulation of the received waveform. The most challenging aspect of this project is achieving the desired EMI rejection specs in this frequency range. There is currently no technology for achieving high-Q notch filters over this frequency range. We will try to extend our current bandpass design techniques to develop a high-Q notch filter. Using EM simulations and modeling, we will optimize notch resonators for operation over this frequency range and for the tunability requirements. Then, we will design fixed notch filters to prove the concept feasibility. Finally, we will project achievable parameters for a tunable filter. Successful completion of this effort will form a solid foundation for building and testing an engineering prototype in Phase II.