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- W2138582008 abstract "Transposed flicker noise reduction and removal is demonstrated in 7.6 GHz microwave oscillators for offsets greater than 10 kHz. This is achieved by using a GaAs-based feedforward power amplifier as the oscillation-sustaining stage and incorporating a limiter and resonator elsewhere in the loop. 20 dB noise suppression is demonstrated at 12.5 kHz offset when the error correcting amplifier is switched on. Three oscillator pairs have been built. A transmission line feedback oscillator with a Qo of 180 and two sapphire-based, dielectric resonator oscillators (DROs) with a Qo of 44,500. The difference between the two DROs is a change in the limiter threshold power level of 10 dB. The phase noise rolls-off at (1/f)(2) for offsets greater than 10 kHz for the transmission line oscillator and is set by the thermal noise to within 0-1 dB of the theoretical minimum. The noise performance of the DROs is within 6-12 dB of the theory. Possible reasons for this discrepancy are presented." @default.
- W2138582008 created "2016-06-24" @default.
- W2138582008 creator A5084599148 @default.
- W2138582008 creator A5088210863 @default.
- W2138582008 date "2007-06-01" @default.
- W2138582008 modified "2023-10-04" @default.
- W2138582008 title "Reduced transposed flicker noise in microwave oscillators using GaAs-based feedforward amplifiers" @default.
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- W2138582008 doi "https://doi.org/10.1109/tuffc.2007.365" @default.
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