Further studies on injection synchronized oscillator

Injection-locking properties of a practical oscillator have been re-examined with particular emphasis on the flow of current into the input port of the active device. This approach has made it possible to understand various types of asymmetric locking characteristics observed in practice. Detailed theoretical analyses have been carried out to take care of the effect of second- and third-harmonic distortion components through the active device. Also presented are experimental results in support of the theoretical conclusion.