| Citation: |
Chen Liqiang, Zhang Jian, Li Zhiqiang, Chen Pufeng, Zhang Haiying. A Monolithic InGaP/GaAs HBT VCO for 5GHz Wireless Applications[J]. Journal of Semiconductors, 2007, In Press.
Chen L Q, Zhang J, Li Z Q, Chen P F, Zhang H Y. A Monolithic InGaP/GaAs HBT VCO for 5GHz Wireless Applications[J]. Chin. J. Semicond., 2007, 28(6): 823.
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A Monolithic InGaP/GaAs HBT VCO for 5GHz Wireless Applications
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Abstract
A monolithic voltage controlled oscillator (VCO) based on negative resistance principle is presented utilizing commercially available InGaP/GaAs hetero-junction bipolar transistor (HBT) technology.This VCO is designed for 5GHz-band wireless applications.Except for bypass and decoupled capacitors,no external component is needed for real application.Its measured output frequency range is from 4.17 to 4.56GHz,which is very close to the simulation one.And the phase noise at an offset frequency of 1MHz is -112dBc/Hz.The VCO core dissipates 15.5mW from a 3.3V supply,and the output power ranges from 0 to 2dBm.To compare with other oscillators,the figure of merit is calculated,which is about -173.2dBc/Hz.Meanwhile,the principle and design method of negative resistance oscillator are also discussed.-
Keywords:
- VCO,
- MMIC,
- wireless communication,
- InGaP/GaAs HBT
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References
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Proportional views
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