Systematic Methodology for the Global Stability Analysis of Nonlinear Circuits

Hernandez, Silvia; Suárez, Almudena

doi:10.1109/tmtt.2018.2873340

Cited by 11 publications

(9 citation statements)

References 38 publications

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“…However, up to date, a consolidated and systematic design flow for reflective pF SLs is still missing. Such a lack of information, along with the complexity of adapting the ad-hoc simulation techniques developed for parametric circuits to the algorithms used by commercial circuit simulators [28]- [32], has inhibited the design of reflective pF SLs simultaneously achieving low P th and IL s.s values.…”

Section: Reflective Pf Sls -Design Methodologymentioning

confidence: 99%

Reflective Parametric Frequency Selective Limiters with sub-dB Loss and $μ$Watts Power Thresholds

Hussein,

Ibrahim,

Rinaldi

et al. 2020

Preprint

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This article describes the design methodology to achieve reflective diode-based parametric frequency selective limiters (pF SLs) with low power thresholds (P th ) and sub-dB insertion-loss values (IL s.s ) for driving power levels (Pin) lower than P th . In addition, we present the measured performance of a reflective pF SL designed through the discussed methodology and assembled on a FR-4 printed circuit board (PCB). Thanks to its optimally engineered dynamics, the built pF SL can operate around ∼2.1 GHz while exhibiting record-low P th (-3.4 dBm) and IL s.s (0.94 dB) values. Furthermore, while the pF SL can selectively attenuate undesired signals with power ranging from -3.4 dBm to 13 dBm, it provides a strong suppression level (IS > 12.0 dB) even when driven by much higher Pin values approaching 28 dBm. Such measured performance metrics demonstrate how the unique nonlinear dynamics of parametric-based FSLs can be leveraged through components and systems compatible with conventional chip-scale manufacturing processes in order to increase the resilience to electromagnetic interference (EMI), even of wireless radios designed for a low-power consumption and consequently characterized by a narrow dynamic range.

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Section: Reflective Pf Sls -Design Methodologymentioning

confidence: 99%

Reflective Parametric Frequency Selective Limiters with sub-dB Loss and $μ$Watts Power Thresholds

Hussein,

Ibrahim,

Rinaldi

et al. 2020

Preprint

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“…This is done by sweeping one of the parameters (η 1 ) and solving the bifurcation condition in terms of and the other parameter (η 2 ). Prior to the works [24], [49]- [52], this was done through continuation methods [53], which use the solution point n as initial guess for the point n+1, as well as parameter switching [3] to circumvent the possible turning points. However, these methods are inherently local and will not be able to provide boundaries composed by several disconnected curves.…”

Section: B Stability Boundariesmentioning

confidence: 99%

“…However, these methods are inherently local and will not be able to provide boundaries composed by several disconnected curves. In [24], [49]- [52], this problem has been addressed using contour-intersection methods, applied so far to obtain the zeroes of Y( ,η 1 ,η 2 ). However, the use of an admittance function calculated at a particular location may suffer from insufficient observability in complex structures.…”

Section: B Stability Boundariesmentioning

confidence: 99%

Stability and Oscillation Analysis at Circuit Level and Through Semi-Analytical Formulations

et al. 2021

Self Cite

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Harmonic balance provides steady-state solutions only and has significant shortcomings when addressing oscillatory regimes. As a result, complementary methodologies are required both to ensure the stability of the solution obtained and to design/simulate oscillator circuits. The complexity of the stability analysis increases with the number of active elements and the intricacy of the topology, so there can be uncertainties in the case of complex structures. On the other hand, as recently demonstrated oscillators enable a compact and low-cost implementation of RFID readers and radar systems, which comes at the expense of a more complex performance, very difficult/impossible to simulate with commercial HB. This work presents a review of recent advances on stability and oscillation analysis at circuit level and through semi-analytical formulations. At circuit level, a method for the stability analysis of complex microwave systems is presented, based on the calculation of the characteristic determinant, extracted from the commercial simulator through a judicious partition of the system into simpler blocks. This determinant will be used for the first time to obtain the stability boundaries through a contour-intersection method, able to provide multivalued and disconnected curves. At a semi-analytical level, a realistic numerical model of the standalone oscillator, extracted from HB simulations, is introduced in an analytical formulation that describes the oscillator interaction with other elements. Here it will be applied to a self-injection locked radar, in which the oscillator is injected by its own signal after this signal undergoes propagation and reflection effects. A procedure to determine the stability properties considering the time delay of the signal envelope is presented for the first time. Using the same self-injection concept, a new stabilization method to reduce the phase-noise of an existing oscillator with minimum impact on its original frequency is described.

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“…Although there are many approaches to the stability problem, we believe that the most appropriate and simple tool for the analysis of stability was provided in [18][19][20][21]. This is due to the identification of pole zero.…”

Section: Introductionmentioning

confidence: 99%

Stability, Mounting, and Measurement Considerations for High-Power GaN MMIC Amplifiers

González-Posadas,

Jiménez-Martín,

Parra-Cerrada

et al. 2023

Sensors

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In this paper, the precise design of a high-power amplifier (HPA) is shown, along with the problems associated with the stability of “on-wafer” measurements. Here, techniques to predict possible oscillations are discussed to ensure the stability of a monolithic microwave-integrated circuit (MMIC). In addition, a deep reflection is made on the instabilities that occur when measuring both on wafer and using a mounted chip. Stability techniques are used as tools to characterize measurement results. Both a precise design and instabilities are shown through the design of a three-stage X-band HPA in gallium nitride (GaN) from the WIN Semiconductors Corp. foundry. As a result, satisfactory performance was obtained, achieving a maximum output power equal to 42 dBm and power-added efficiency of 32% at a 20 V drain bias. In addition to identifying critical points in the design or measurement of the HPA, this research shows that the stability of the amplifier can be verified through a simple analysis and that instabilities are often linked to errors in the measurement process or in the characterization of the measurement process.

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Systematic Methodology for the Global Stability Analysis of Nonlinear Circuits

Cited by 11 publications

References 38 publications

Reflective Parametric Frequency Selective Limiters with sub-dB Loss and $μ$Watts Power Thresholds

Reflective Parametric Frequency Selective Limiters with sub-dB Loss and $μ$Watts Power Thresholds

Stability and Oscillation Analysis at Circuit Level and Through Semi-Analytical Formulations

Stability, Mounting, and Measurement Considerations for High-Power GaN MMIC Amplifiers

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