A novel phase noise reduction technique in oscillators using defected ground structure

A new technique to reduce the phase noise in microwave oscillators is developed using the resonant characteristic of the defected ground structure (DGS). Two kinds of oscillators have been designed and measured for the examination of the reduction of phase noise by the DGS. The first adopts the DGS...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2002-02, Vol.12 (2), p.39-41
Main Authors: Young-Taek Lee, Jong-Sik Lim, Jun-Seok Park, Ahn, D., Sangwook Nam
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Frequency
Gate circuits
Grounds
Microstrip
Microstrip lines
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwave oscillators
Microwave theory and techniques
Microwaves
MMICs
Noise
Noise levels
Noise measurement
Noise reduction
Oscillators
Oscillators, resonators, synthetizers
Phase measurement
Phase noise
Q factor
Resonance
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Summary:A new technique to reduce the phase noise in microwave oscillators is developed using the resonant characteristic of the defected ground structure (DGS). Two kinds of oscillators have been designed and measured for the examination of the reduction of phase noise by the DGS. The first adopts the DGS section under the microstrip line at the gate circuit, while the second has only the conventional microstrip line. Measurement shows reduced phase noise by 10-15 dB in the oscillator with the DGS compared to the conventional one.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/7260.982870