This new class of oscillator synchronously generates the signals needed for multiple-band, multimode communications with and without switching resonators or using multipliers.
The trick is combining self-injection locking with mode-coupling techniques to shave the size, cost, and phase noise from voltage-controlled crystal oscillators (VCXOs).
These free-running and phase-locked reference sources can be supplied in standard and custom frequencies through 3 GHz, at a fraction of the size and power consumption of multiplied references.
Dynamic-phase-injection techniques help to tame tunable active inductors for use in miniature monolithic VCOs that provide low phase noise while operating with low power consumption.
Using a hybrid approach based on miniature SAW and printed-circuit resonators, these tiny VCOs measure just 0.3 x 0.3 in. but can tune from 100 MHz to 12 GHz.
Shrinking the size of planar resonators has led to extremely compact oscillators that are the building blocks for tiny, high-performance, PLL-based frequency synthesizers.
Voltage-controlled oscillators (VCOs) based on novel self-injection-locked compact coupled planar resonators (CCPRs) feature high Qs and low phase noise at microwave frequencies.
