Analysis, Design, and Fabrication of High-Efficiency, High Average Power, Pulsed TRAPATT Diode Oscillators.
Final rept. 21 Jun 74-31 Aug 75,
MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB
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The objectives of the program are to investigate theoretically and experimentally to verify the start-up transient behavior of the TRAPATT mode in both n- and p-type avalanche diodes. The investigation has involved three stages a The development of a computer program which models with good accuracy the coaxial line currently in use in our laboratory b The interaction of the above program with an already existing device program and, c The investigation of the effect of pulse rise time on the turn-on behavior of the TRAPATT mode. Two basic studies were performed a Theoretical Computer Study. This phase of the program has involved the development of a computer model which takes into consideration both the diode and the circuit properties. A particular current drive is assumed to exist and the interaction between the diode and circuit is evaluated thus resulting in the time-varying voltage wave shape developed across the diode. b Experimental Measurement of Transient TRAPATT Triggering Behavior. Detailed experiments have been executed to identify those mechanisms which participate in the turn-on characteristics of a TRAPATT device. The investigations have revealed the presence of numerous oscillations being present during the initiation of the TRAPATT mode. The various signals are identified, and it is demonstrated that the TRAPATT mode may be triggered by any one of the signals which are present.
- Electrical and Electronic Equipment