| Parametric Oscillation - Microwave Frequency Divider |
| Microwave Frequency Divider Gregory explains what is Parametric Modulation and how it can lead to Parametric Oscillation. Parametric amplifiers and frequency dividers are a class of devices less known by RF enthusiasts. Modulation of some parameter of the circuit, commonly the active gain or the resonant susceptances, enables amplification by energy pumping or sub-harmonic oscillation. The phenomenon is used, over a microwave oscillator, to generate injection locking at half the input frequency. In the example, the circuit is excited with 2.6GHz and the output is a clean tone of 1.3GHz. The circuit utilizes a single transistor and, with the help of microstrip resonators, can be used as a frequency divider for very high frequencies. Original article at Gusberti Analog: https://gusbertianalog.com/parametric-frequency-divider/ Video showing the oscillator topology, from Matjaz Vidmar: https://www.youtube.com/watch?v=IHCCp0b9t7w&t=0s |