A phase noise reduction technique in microwave oscillator using high-Q active filter

The authors present a 10 GHz oscillator that uses a high-Q active filter to reduce the phase noise. The loaded Q of active filter is obtained at about 500. This oscillator is compared with another oscillator which uses a passive filter. The difference of two oscillators' Q is estimated at 12.5...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2002-11, Vol.12 (11), p.426-428
Main Authors: JAECHUN LEE, LEE, Young-Taek, SANGWOOK NAM
Format: Article
Language:English
Subjects:
Active filters
Applied sciences
Circuit properties
Circuits
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Gain
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwave filters
Microwave oscillators
Microwave theory and techniques
Microwaves
Noise
Noise levels
Noise measurement
Noise reduction
Oscillators
Oscillators, resonators, synthetizers
Passive filters
Phase measurement
Phase noise
Reduction
Resonator filters
Simulation
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Description
Summary:The authors present a 10 GHz oscillator that uses a high-Q active filter to reduce the phase noise. The loaded Q of active filter is obtained at about 500. This oscillator is compared with another oscillator which uses a passive filter. The difference of two oscillators' Q is estimated at 12.5 times the open-loop gain simulation. The measured result of phase noise at 100 kHz offset shows maximum 10 dB reduction with high-Q active filter.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2002.805541