Accurate modeling and experimental validation of an injection-locked frequency divider

In recent years, as injection-locked frequency dividers (ILFD) have become more widely used, numerous papers have proposed contradictory models for the locking bandwidth of the dividers. This paper attempts to resolve this conflict through the creation of an accurate simplified model to predict the locking range of an IFLD. A simple novel method of enlarging the locking range is also presented. The results are verified experimentally.