A LIGHTWEIGHT, UHF SATCOM DIPLEXER FOR USE IN EXPENDABLE BUOY SYSTEMS Navy SBIR FY2007.3 Sol No.: Navy SBIR FY2007.3 Topic No.: N07-191 Topic Title: A LIGHTWEIGHT, UHF SATCOM DIPLEXER FOR USE IN EXPENDABLE BUOY SYSTEMS Proposal No.: N073-191-0135 Firm: Cobra Design & Engineering, Inc 3230 Bennett St. N St. Petersburg, Florida 33713 Contact: John Tischner Phone: (727) 528-1621 Web Site: www.cobra-design-eng.com Abstract: The existing Diplexer Designs currently employ bulky, machined cavity housings and cannot meet the requirements of a UHF SATCOM full duplex capability while staying within the weight budget. Cobra Design & Engineering, Inc. intends to employ a tubular coaxial resonator construction consisting of meandering tubes with interconnected ends. This method will allow the components to be lightweight, affordable and rugged enough to withstand the shock environment while meeting the electrical requirements of a full duplex UHF SATCOM Diplexer. Initial analysis of this concept suggests minimal insertion losses and a unit weight that is very close to the required limit. Benefits: Existing Diplexer designs are typically bulky, machined housing that are heavy and expensive to fabricate. The concept described in this proposal is a lightweight, full duplex diplexer that can be used in antenna systems that are weight and cost conscious. The targeted market for this diplexer approach would be man-pack mounted antennas, hand held full duplex SATCOM terminals, airborne or UAV mounted UHF SATCOM systems, and where large arrays of UHF antennas are required. In addition to diplexer/duplexer applications, the proposed filters could be applied to cosite interference mitigation products, especially for satellite or UAV platforms where physical antenna separations are limited, and small size and light weight components are crucial. Return