Fast Tuning, Analog Notch Filters Navy SBIR FY2008.1 Sol No.: Navy SBIR FY2008.1 Topic No.: N08-083 Topic Title: Fast Tuning, Analog Notch Filters Proposal No.: N081-083-0512 Firm: Out of the Fog Research LLC Stuart Berkowitz 2258 20th Avenue San Francisco, California 94116 Contact: Stuart Berkowitz Phone: (415) 505-3827 Web Site: www.outofthefogresearch.com Abstract: In this program, we will develop a concept for microsecond tuning notches meeting the notch depth and insertion loss requirements of the application. We will define a full set of target specifications for the tunable notches that meet a current or future operational need. We will demonstrate through simulation that this technology can be used for microsecond tunable narrowband notch filters with minimal insertion loss. We will then design and optimize a resonator to minimize the size, maximize the Q (hence minimizing passband loss) and the tuning range, and optimize the precision in Phase II. We will then outline the technical risks for Phase II. Successful completion of this effort will form a solid foundation for building and testing a prototype tunable filter in Phase II. Benefits: Such filters should have applicability in digital transmitters at the point where digital to analog signal conversion happens, assuming they have sufficient power handling characteristics to be low loss. They may also have applicability in commercial comms systems where spectral density is high so that active suppression of adjacent channels is critical to a given channel's utility. Return