Design of low phase noise substrate integrated waveguide oscillator based on complexquality factor (Qsc)
A low phase noise substrate integrated waveguide (SIW) oscillator based on complex quality factor (Qsc) is presented. The oscillator employing a fourth degree cross coupled bandpass SIW filter is designed at the oscillation frequency for the feedback loop as a frequency stabilization element. In this paper, the peak frequency of the complex quality factor (Qsc) is adopted for oscillator design instead of designing the oscillator at groupdelay peak frequency conventionally. The measured phase noise performance of the developed oscillator is 141.4 dBc/Hz at 1MHz offset frequency with the figure of merit (FOM) of 198.3dBc/Hz.
2016 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)