Photoconductive switching has been explored at LLNL and demonstrated to be a viable technology for high power microwave (HPM) generation. This technology enables the development of compact, portable, and efficient HPM sources. At LLNL we have successfully switched 35 KV in less than 200 ps using laser triggered, 1 x 5 x 20 mm GaAs switches. Based on these results we are developing an HPM generator with applications for HPM weapons and high power, wideband radar. The paper will discuss the physics limits and tradeoffs in the application of this technology. Among the topics discussed will be switching efficiency, candidate switch materials, laser requirements, applicable laser technologies, generator configurations, and cooling requirements and techniques. In addition to presenting theoretical and practical considerations, the paper will discuss on-going work at LLNL and elsewhere.
Presented at the 5th National Conference on High-Power Microwave Technology
- Pub Date:
- Microwave Amplifiers;
- Switching Circuits;
- Gallium Arsenides;
- Laser Applications;
- Electronics and Electrical Engineering