Advanced Wide Band RF Distribution System Navy SBIR FY2005.1 Sol No.: Navy SBIR FY2005.1 Topic No.: N05-074 Topic Title: Advanced Wide Band RF Distribution System Proposal No.: N051-074-0557 Firm: Out of the Fog Research Stuart Berkowitz 2258 20th Avenue San Francisco, California 94116 Contact: Stuart Berkowitz Phone: (415) 505-3827 Web Site: www.outofthefogresearch.com Abstract: 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. Benefits: This technology could be used to provide situational awareness for a variety of homeland security and Coast Guard applications such as border monitoring, port security, high value (power plants, chemical plants, water plants, etc.) facility protection. Other civilian applications include acquisition and location of cell phones and mobile emergency signals for quick response. Return