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Hundreds of radar systems in operation today utilize thyratrons, spark gaps, or switch tubes for high pulse repetition frequency pulse modulation. These vacuum tube modulators are expensive to maintain, and their relatively short lifetimes constitute a significant operational expense. DTI has modernized radar transmitters, and built high performance new radar transmitters, across a wide range of applications.


DTI's solid state, high voltage switches work as high-power cathode modulators for klystrons, CFAs or magnetrons, and as low-power modulators for tubes that use modulating anodes, grids, or control electrodes. PowerMod™ switches are perfect for retrofits, test sets and new designs. A transmitter upgrade using DTI's modern, solid state technology may be the most cost-effective answer to problems of high failure rates and lengthy repair procedures common to older transmitters. A retrofit may encompass a few components or a complete turn-key transmitter replacement.


DTI's high-efficiency modulators are inherently pulse-width agile, and can open in less than a microsecond, often eliminating the need for a conventional crowbar.

Below is a list of publications relating to DTI's radar technologies and applications.

  • Radar Modernization - A two page color data sheet presenting an overview of DTI's radar modernization capabilities. 

  • Switch Tube Test Set_(2013) - A three page paper, describing the development of a triode test set contracted to DTI by BAE Systems. Presented at the 2013 IEEE International Pulsed Power & Plasma Science Conference. (722 kB) 

  • Solid-State Transmitter for a 2 MW Klystron_(2012) - A three page paper, describing the structure of a transmitter system built and installed by DTI to support a 2 MW klystron. The transmitter consists of two HV power supplies, cap bank, modulator (opening switch) and controls. (751 kB) 

  • Solid-State Radar Modulators (2001) - A four page paper describing the application of DTI's technology to the Navy's AN/SPG-60 radar system and the Naval Research Laboratory's 94 GHz gyroklystron. The benefits of solid state technology are highlighted. This paper was presented at the 24th International Power Modulator Symposium. (3.4 MB) 

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