Ku-band InGaP-GaAs HBT MMIC VCOs with balanced and differential topologies

Balanced and differential voltage controlled oscillators (VCOs) are investigated with analytic noise models. Fully integrated VCOs in Ku-band are implemented on an InGaP-GaAs heterojunction bipolar transistor technology. The balanced VCO has higher output power and lower phase-noise performance, whi...

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Bibliographic Details
Published inIEEE transactions on microwave theory and techniques Vol. 52; no. 4; pp. 1353 - 1359
Main Authors Baek, D., Ko, S., Kim, J.-G., Kim, D.-W., Hong, S.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.04.2004
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Frequency
Heterojunction bipolar transistors
MMICs
Mobile communication
Phase noise
Power generation
Q factor
Topology
Voltage
Voltage-controlled oscillators
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Summary:Balanced and differential voltage controlled oscillators (VCOs) are investigated with analytic noise models. Fully integrated VCOs in Ku-band are implemented on an InGaP-GaAs heterojunction bipolar transistor technology. The balanced VCO has higher output power and lower phase-noise performance, while drawing lower current than the differential VCO. This coincides with the analytical expectation. The shot noise of collector current contributes less to the phase noise in the balanced VCO (B-VCO) than in the differential VCO. The B-VCO shows 2-3 dB lower phase-noise performances of 90.5, -113.8dBc/Hz at the offset frequencies 100 kHz, and 1-MHz offset at 13.5 GHz than the differential VCO, and figures of merit of 180.7 and -177.6dBc/Hz are achieved, respectively.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2004.825726