Planar trapatt diodes

Planar Trapatt diodes in the form of single diodes and multiple diode arrays have been successfully fabricated for the first time with good rf performances. A seven-diode array has produced 500 W pulsed power output at 1.4 GHz with 30% efficiency. Duty cycles of 2% have been achieved. The multiple diodes have a superior thermal characteristic and are more rugged compared with mesa structures with junction edges exposed. Diode chips have been run thermal tests at 500°C for over 300 hours without failure.