Parametric Oscillator - 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... Video showing the oscillator topology, from Matjaz Vidmar:    • Microwave 1.7GHz VCO Oscillator   Support the channel, helping me bring more videos like this one:   / allelectronics   Subscribe to the channel:    / @allelectronicschannel   00:22 - Frequency divider setup overview 01:25 - Parametric oscillation - energy perspective 07:25 - Bias of the varactors and injection locking 07:45 - Input frequency tracking 08:15 - Injection locking - signal perspective References: https://www.nii.ac.jp/qis/first-quant... https://en.wikipedia.org/wiki/Paramet... https://www.rp-photonics.com/parametr... https://arxiv.org/abs/2108.10471 https://en.wikipedia.org/wiki/Injecti...