Impact of Stabilizing Networks on Phase Noise in Microwave Bridge Oscillators

Author

Tsarapkin, Dmitry P. ; Kozlov, Sergey S.

Author_Institution

Fac. of Radio Eng., Moscow Power Eng. Inst.

fYear

2006

fDate

38869

Firstpage

685

Lastpage

690

Abstract

The microwave oscillator utilizing a bridge-type network as a positive feedback loop filter (MBoS) opens a possibility to increase an oscillator effective g-factor by many times thus improving its frequency stability and phase noise. This paper develops the previous analysis taking into account impact on MBoS phase noise of auxiliary stabilizing networks (SNs) used in practical design to prevent parasitic oscillations. The SNs under analysis are presented with a classic transmission resonator (SN1), a new non-minimal-phase circuit of the second order having two pairs of complex conjugate zeros and poles (SN2) and their combination. As expected, the optimized MBoS could provide as low phase noise as approximately -(140... 145) dBc/Hz at 1 kHz offset in the case of a room temperature X-band oscillator utilizing sapphire whispering-gallery resonator

Keywords

circuit feedback; frequency stability; microwave oscillators; phase noise; sapphire; transfer functions; X-band; feedback loop filter; frequency stability; g-factor; microwave bridge oscillators; phase noise; sapphire whispering-gallery resonator; stabilizing networks; transmission resonator; Bridge circuits; Feedback loop; Microwave filters; Microwave oscillators; Phase noise; Poles and zeros; Q factor; Resonant frequency; Stability; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

International Frequency Control Symposium and Exposition, 2006 IEEE

Conference_Location

Miami, FL

Print_ISBN

1-4244-0074-0

Electronic_ISBN

1-4244-0074-0

Type

conf

DOI

10.1109/FREQ.2006.275470

Filename

4053848