Abstract
The results of development and modernization of a high-stable small-size reference microwave oscillator with a PLL and a low level of phase noise for use in special purpose equipment with an operating frequency of 3.6 GHz, phase noise (with 2 kHz offset) of -112 dBc/Hz and output power from 0 to 40 mW are presented.
Highlights
The constant stringency of requirements for frequency and microwave signal shapers, intended for different special purpose systems, leads developers to look for new technical solutions to achieve high electrical and weight-dimension characteristics
Most of these systems are based on using various types of frequency synthesizers in their composition, the development process of which in each individual case should begin with analyzing a set of requirements for the characteristics of the frequency shaper spectrum in general, the level of phase noise, the frequency range of the output signal, the switching time and the analysis of operating conditions and application areas of the developed equipment as well
In gigahertz frequency range the shapers consist of frequency synthesizers of indirect frequency synthesis, including reference microwave oscillators based on dielectric resonators (DR) or coaxial dielectric resonators (CDR), stabilized by a loop with phase lock loop (|PLL), their parameters substantially determine the quality of the system as a whole
Summary
The constant stringency of requirements for frequency and microwave signal shapers, intended for different special purpose systems, leads developers to look for new technical solutions to achieve high electrical and weight-dimension characteristics Most of these systems are based on using various types of frequency synthesizers in their composition, the development process of which in each individual case should begin with analyzing a set of requirements for the characteristics of the frequency shaper spectrum in general, the level of phase noise, the frequency range of the output signal, the switching time and the analysis of operating conditions and application areas of the developed equipment as well. The VCO spectral power density characteristics of phase noise (NSPD) have a direct impact on the output characteristics of the entire product It will be given special emphasis in this work
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