High Power Solid State Amplifiers
Navy SBIR FY2013.1

Sol No.: Navy SBIR FY2013.1
Topic No.: N131-049
Topic Title: High Power Solid State Amplifiers
Proposal No.: N131-049-0492
Firm: Diversified Technologies, Inc.
35 Wiggins Ave.
Bedford, Massachusetts 01730-2345
Phone: (781) 275-9444
Web Site: www.divtecs.com
Abstract: Diversified Technologies, Inc. (DTI) proposes to design and build an advanced, pulsed solid-state transmitter capable of replacing legacy klystron amplifiers in Navy radars. The new transmitter will integrate commercially available semiconductors into a novel DTI combiner architecture, and will deliver higher availability, simplified maintenance, and an overall reduction of operating costs in comparison to existing klystron systems. This particular architecture is well-suited for applications from UHF to S-band and beyond. Pulsed versions of this system are scalable to a megawatt power level for high duty factor coherent radars. An L-band version of the transmitter will be discussed in this proposal.
Benefits: Many crucial Navy radars are based on a single transmitter architecture, with one transmitter, perhaps with a hot spare, feeding the antenna. These systems employ a high power VED (such as a TWT or klystron) and have a moderate duty cycle. While active solid-state phased arrays are gradually being fielded in small numbers, their extremely high cost means that numerous older radars must be sustained for many decades to come. Until recently, producing the high peak power required in these systems using transistors was unrealistically complicated, limiting solid-state transmitters to either low power or very low frequency. DTI believes that the combination of the latest LDMOS devices in a simplified architecture has the ability to align price and reliability with Navy requirements. The goal of this SBIR is to improve cost scaling for large solid-state transmitters through radical simplification of the high power amplifier itself.