Ka-band and MMIC pHEMT-based VCO's with low phase-noise properties

Garner, P.J.; Howes, M.J.; Snowden, C.M.

doi:10.1109/22.721161

Cited by 25 publications

(1 citation statement)

References 12 publications

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“…If the transistors, and in the differential pair in Fig. 1 are identical, then the differential tank amplitude is described by the superposition of all the noise sources (5) where , , , and indicate the noise contributions coefficients. Since each noise sources are uncorrelated, the total power spectral density is calculated by summing up all the noise powers as follows:…”

Section: B Noise Analysismentioning

confidence: 99%

<tex>$Ku$</tex>-Band InGaP–GaAs HBT MMIC VCOs With Balanced and Differential Topologies

Baek

Kim

et al. 2004

IEEE Trans. Microwave Theory Techn.

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Balanced and differential voltage controlled oscillators (VCOs) are investigated with analytic noise models. Fully integrated VCOs in-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, 113.8 dBc/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 177.6 dBc/Hz are achieved, respectively. Index Terms-Differential and balanced topology, heterojunction bipolar transistor (HBT), inductor, InGaP-GaAs, monolithic microwave integrated circuit (MMIC), phase noise, voltage-controlled oscillator (VCO).

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Section: B Noise Analysismentioning

confidence: 99%

<tex>$Ku$</tex>-Band InGaP–GaAs HBT MMIC VCOs With Balanced and Differential Topologies

Baek

Kim

et al. 2004

IEEE Trans. Microwave Theory Techn.

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Frequency Synthesizers

Rohde¹

2003

Wiley Encyclopedia of Telecommunications

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Phase‐Locked Oscillators and Frequency Synthesizers

Rohde

2005

Encyclopedia of RF and Microwave Engineering

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Synthesizers are used to generate frequencies with arbitrary resolution covering the frequency range from audio to millimeter‐wave. Today, simple frequency synthesizers consist of a variety of synthesizer chips, an external voltage‐controlled oscillator (VCO), and a frequency standard. There are also combinations of techniques that I would like to refer to as “hybrid synthesizers.” They will be covered here.

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Ka-band and MMIC pHEMT-based VCO's with low phase-noise properties

Cited by 25 publications

References 12 publications

<tex>$Ku$</tex>-Band InGaP–GaAs HBT MMIC VCOs With Balanced and Differential Topologies

<tex>$Ku$</tex>-Band InGaP–GaAs HBT MMIC VCOs With Balanced and Differential Topologies

Frequency Synthesizers

Phase‐Locked Oscillators and Frequency Synthesizers

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Ka-band and MMIC pHEMT-based VCO's with low phase-noise properties

Cited by 25 publications

References 12 publications

&lt;tex&gt;$Ku$&lt;/tex&gt;-Band InGaP–GaAs HBT MMIC VCOs With Balanced and Differential Topologies

&lt;tex&gt;$Ku$&lt;/tex&gt;-Band InGaP–GaAs HBT MMIC VCOs With Balanced and Differential Topologies

Frequency Synthesizers

Phase‐Locked Oscillators and Frequency Synthesizers

Contact Info

Product

Resources

About

<tex>$Ku$</tex>-Band InGaP–GaAs HBT MMIC VCOs With Balanced and Differential Topologies

<tex>$Ku$</tex>-Band InGaP–GaAs HBT MMIC VCOs With Balanced and Differential Topologies