Dynamic Behaviour of Stable and Injection-Locked Impatt Diode Amplifiers for PSK Microwave Communication Systems

The transient behaviour of stable and injection-locked IMPATT diode microwave amplifiers driven by phase shift keyed signals is investigated. Experimental results obtained with the aid of a fast real time microwave correlator system and bit error rate measurements show that both amplifier modes are suitable for the amplification of PSK signals. At low injection levels the gain bandwidth product of the injection-locked oscillator can be increased considerably by a transient acceleration technique using bias modulation.