TRAPATT's: High Power Devices for Wide Pulse and CW Microwave Applications

Single large diameter ring structure TRAPATT diodes on diamond heat sinks have yielded power outputs of up to 63 W with 30-35-percent efficiency at 1.73 GHz when operated with 50-µs pulsewidths and at a 1-percent duty factor. CW power outputs of up to 8.3 W at 1.6 GHz have also been obtained. Microwave performance data, diode fabrication procedures, circuit techniques, and a failure analysis are reported.