Effects of frequency chirp on magnetron injection locking

In this paper, effects of time-varying frequencies on the injection locking behavior are explored. Of interest is when the driver frequency is linearly swept (chirp) in time, e.g., for frequency search when the oscillator frequency is not known. It is found that complete locking similar to the constant frequency case can no longer occur. Instead, frequency of the oscillator "tracks" the frequency of the driver within the range that is qualitatively predicted by the Adler\´ s condition. Phase noise for the case in which the free- running frequency fluctuates in time (instead of a linear chirp) is assessed.