SDR Colocated Agile Bandpass Navy SBIR FY2010.2 Sol No.: Navy SBIR FY2010.2 Topic No.: N102-186 Topic Title: SDR Colocated Agile Bandpass Proposal No.: N102-186-0237 Firm: Physical Optics Corporation Information Technologies Division 20600 Gramercy Place, Bldg. 100 Torrance, California 90501-1821 Contact: Daniel Bock Phone: (310) 320-3088 Web Site: www.poc.com Abstract: To address the Navy's need for an improved, high-performance passband filter, Physical Optics Corporation (POC) proposes to develop a new Software-Defined Radio (SDR) Colocated Agile Bandpass (SCAB) filter. This proposed device is based on a hybrid filter design utilizing MEMS voltage-tunable capacitors, lumped elements, and innovative microstrip designs to cover the large bandwidth. SCAB will consist of three primary components: (1) a lumped element filter that can tune from 20 MHz to 400 MHz; (2) a microstrip filter that can tune from 400 MHz to more than 2 GHz; and (3) a high-speed voltage controller that can communicate with SDR systems, which frequency hop. The innovation in the filter design will enable the device to provide improved bandpass performance. As a result, this device offers large tuning range from 20 MHz to >2 GHz, Q of >10, and low insertion loss of <1 dB, which directly address the requirements of the Navy for improved SDR radios. In Phase I, POC will demonstrate the feasibility of SCAB by simulation and fabrication and testing of a prototype. In Phase II, POC plans to advance the design and optimize it for testing with Navy personnel. Benefits: Many public service broadcasters use VHF and lower UHF bands, which, due to colocated radios, creates severe interference. SCAB will provide the ability to reduce channel interference for radio transmitters in use by mobile command centers, as well as radio stations. In addition, it could be incorporated into WiFi systems to increase the isolation between channels, as well as possibly allowing them to be placed closer for increased bandwidth within a communication band. Return