Low phase noise GaAs HBT VCO in Ka-band

Design and fabrication of a Ka-band voltage-controlled oscillator（VCO） using commercially available 1-μm GaAs heterojunction bipolar transistor technology is presented.A fully differential common-emitter configuration with a symmetric capacitance with a symmetric inductance tank structure is employe...

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Published inJournal of semiconductors Vol. 36; no. 2; pp. 120 - 123
Main Author 严婷 张玉明 吕红亮 张义门 武岳 刘一峰
Format Journal Article
LanguageEnglish
Published 01.02.2015
Subjects
GaAs
Gallium arsenide
HBT
Ka波段
Noise
Phase shift
Semiconductors
Symmetry
Tanks
Tuning
VCO
Voltage controlled oscillators
低相位噪声
共发射极
压控振荡器
异质结双极晶体管
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Summary:Design and fabrication of a Ka-band voltage-controlled oscillator（VCO） using commercially available 1-μm GaAs heterojunction bipolar transistor technology is presented.A fully differential common-emitter configuration with a symmetric capacitance with a symmetric inductance tank structure is employed to reduce the phase noise of the VCO,and a novel π-feedback network is applied to compensate for the 180° phase shift.The on-wafer test shows that the VCO exhibits a phase noise of-96.47 dBc/Hz at a 1 MHz offset and presents a tuning range from 28.312 to 28.695 GHz.The overall dc current consumption of the VCO is 18 mA with a supply voltage of-6 V.The chip area of the VCO is 0.7×0.7 mm^2.
Bibliography:VCO; GaAs HBT; common-emitter; phase noise;π-feedback
Design and fabrication of a Ka-band voltage-controlled oscillator（VCO） using commercially available 1-μm GaAs heterojunction bipolar transistor technology is presented.A fully differential common-emitter configuration with a symmetric capacitance with a symmetric inductance tank structure is employed to reduce the phase noise of the VCO,and a novel π-feedback network is applied to compensate for the 180° phase shift.The on-wafer test shows that the VCO exhibits a phase noise of-96.47 dBc/Hz at a 1 MHz offset and presents a tuning range from 28.312 to 28.695 GHz.The overall dc current consumption of the VCO is 18 mA with a supply voltage of-6 V.The chip area of the VCO is 0.7×0.7 mm^2.
Yan Ting, Zhang Yuming, Lv Hongliang, Zhang Yimen , Wu Yue,Liu Yifeng
11-5781/TN
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-4926
DOI:10.1088/1674-4926/36/2/025001