Investigation of Phase Noise Generation in Microwave Electron Devices Operating in Nonlinear Regime Exploiting a Flexible Load– and Source–Pull Oscillating Setup

Florian, Corrado; Traverso, Pier Andrea

doi:10.1109/tmtt.2009.2033862

Cited by 5 publications

(1 citation statement)

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“…Indeed, by means of harmonic balance simulations, the LS voltage and currents waveforms have been optimized to obtain the best performance in terms of output power, gain compression, amplitude and frequency stability and PN. Parametric LS sensitivity analyses were exploited as well as a control of the dynamic intrinsic device load line to avoid in particular the device triode region and an excessive modulation of the noise sources, which is harmful for PN as described in [1] and [6]. The microstrip resonator was privileged rather than a lumped LC tank solution, since it had shown better Q factor also thanks to the thick metal layer available.…”

Section: Mmic Design Descriptionmentioning

confidence: 99%

A C-band GaAs-pHEMT MMIC low phase noise VCO for space applications using a new cyclostationary nonlinear noise model

Florian

Traverso

Feudale

et al. 2010

2010 IEEE MTT-S International Microwave Symposium

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This paper describes the design and implementation of a C-band MMIC VCO developed in the framework of activities oriented to the improvement of products for space applications. The circuit exploits a single device with a microstrip integrated resonator coupled with varactors. The exploited technology is a space-qualified GaAs 0.25-um pHEMT process. The MMIC exhibits 350-MHz bandwidth at 7.3 GHz, with 14 dBm output power and -86 dBclHz single side-band phase noise at 100 kHz from the carrier. Measured performances are in good agreement with simulations. The active device adopted for the design was characterized in terms of both low-frequency noise in quiescent bias-dependent operation and its up-conversion into phase noise under large signal RF oscillating conditions, using in-house developed measurement setups. A new compact nonlinear noise model was identified, implemented and exploited for phase noise simulations. The model features cyclostationary equivalent noise generators. Comparisons between measurements and simulationsshow that the nonlinear cyclostationary modeling approach is more accurate than conventional noise models in oscillator phase noise analyses of pHEMT based circuits.Index Terms -Voltage controlled oscillator, nonlinear noise model, oscillator phase noise.978-1-4244-7732-6/101$26.00 ©201 0 IEEE 284

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Section: Mmic Design Descriptionmentioning

confidence: 99%