Efficient Time-Domain Noise Modeling Approach for Millimeter-Wave Fets

Asadi, Sareh; Yagoub, M.C.E.

doi:10.2528/pier10042012

Cited by 10 publications

(6 citation statements)

References 19 publications

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“…The solution is the same as the previous algorithm. By substituting Equations 11 and 12 into Equation 22, voltage and current at the beginning and the end of the line can be expressed as follows…”

Section: New Mathematical Formulation For Crlh Active Multiconductomentioning

confidence: 99%

“…Now, the obtained integro‐differential equations will be solved using the FDTD method. By using this method, the differential equations will be discretised and solved using the leap‐frog scheme …”

Section: Introductionmentioning

confidence: 99%

“…By using this method, the differential equations will be discretised and solved using the leap-frog scheme. [22][23][24] To validate the results of the proposed method, they are compared with the results of the Advanced Design System (ADS) software. 25 In the subsequent section, the stability of the proposed FDTD method, as one of the most important factors of a numerical method, is analysed.…”

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confidence: 99%

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Modelling of composite right/left‐handed active multiconductor transmission lines (AMCTL) in time domain

Ghadimi

Asadi

2017

Int J Numerical Modelling

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An explicit finite difference time domain method is proposed for modelling of composite right-/left-handed active multiconductor transmission lines in time domain. For the first time, the concept of active composite right-/left-handed transmission lines is considered in field effect transistor (FET) modelling. In this work, based on the distributed model, the FET is considered as an active multiconductor transmission line in the mm/wave frequency range. In this modelling technique, the FET is divided into 2 different parts, the active part, represents the intrinsic equivalent circuit of the transistor, while the passive part symbolizes the device electrodes. The finite-difference time-domain scheme is proposed for the analysis, and the results of this technique are compared with the ones obtained from simulations. Furthermore, the stability issue is investigated and the sufficient condition for stability is derived. 14 Also, a time-domain analysis of the CRLH TL has been already investigated using numerical methods by Gomez-Diaz et al. 15 Additionally, the idea of active CRLH TL has already been applied to some devices and circuits. 16,17 Modern communication system performance strongly depends on active elements, among which field effect transistors (FETs) are largely present. However, their behaviour in the millimetre-wave frequency range is still perfectible. Analysing transmission lines in the millimetre-wave range will result in some complicated problems such as radiation and unwanted coupling between circuit elements. Therefore, a full wave approach needs to be used when the size of the electrodes are proportional to the wavelength. 18 However, full-wave analysis are usually based on highly complicated numerical techniques that require huge CPU time and computational resources. 18-21In the proposed modelling technique, the FET is considered in the form of 3 active TLs. Based on this modelling procedure, the device will be split into an infinite number of sections. Each section is composed of 3 multiconductor transmission lines (referring to gate, drain, and source) in which each electrode is supposed to be composed of metamaterial and a traditional

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Section: New Mathematical Formulation For Crlh Active Multiconductomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Modelling of composite right/left‐handed active multiconductor transmission lines (AMCTL) in time domain

Ghadimi

Asadi

2017

Int J Numerical Modelling

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“…with h 1;2 as the complex network functions from a particular source to the selected port, while the angle brackets h::i stand for the ensemble average of the randomly varying spectral amplitude [2]. For convenience unit bandwidth Df ¼ 1 Hz has been assumed here and the PSD-s are denoted as S ij ¼ l i Á l Ã j D E .…”

Section: Introductionmentioning

confidence: 99%

Correlated noise in bipolar transistors: Model implementation issues

Huszka

Chakravorty

2015

Solid-State Electronics

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“…• Noise factor (F ) must be minimized, but to minimize the noise factor of the active device is very difficult because it is near to the lowest thanks to current manufacturing techniques [23].…”

Section: Classic Optimization Methodsmentioning

confidence: 99%

Transpose Return Relation Method for Designing Low Noise Oscillators

Jiménez-Martín¹,

González-Posadas²,

Parra-Cerrada³

et al. 2012

PIER

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Abstract-In this paper, a new linear method for optimizing compact low noise oscillators for RF/MW applications will be presented. The first part of this paper makes an overview of Leeson's model. It is pointed out, and it is demonstrates that the phase noise is always the same inside the oscillator loop. It is presented a general phase noise optimization method for reference plane oscillators. The new method uses Transpose Return Relations (RR T ) as true loop gain functions for obtaining the optimum values of the elements of the oscillator, whatever scheme it has. With this method, oscillator topologies that have been designed and optimized using negative resistance, negative conductance or reflection coefficient methods, until now, can be studied like a loop gain method. Subsequently, the main disadvantage of Leeson's model is overcome, and now it is not only valid for loop gain methods, but it is valid for any oscillator topology. The last section of this paper lists the steps to be performed to use this method for proper noise optimization during the linear design process and before the final non-linear optimization. The power of the proposed RR T method is shown with its use for optimizing a common oscillator, which is later simulated using Harmonic Balance (HB) and manufactured. Then, the comparison of the linear, HB and measurements of the phase noise are compared.

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Efficient Time-Domain Noise Modeling Approach for Millimeter-Wave Fets

Cited by 10 publications

References 19 publications

Modelling of composite right/left‐handed active multiconductor transmission lines (AMCTL) in time domain

Modelling of composite right/left‐handed active multiconductor transmission lines (AMCTL) in time domain

Correlated noise in bipolar transistors: Model implementation issues

Transpose Return Relation Method for Designing Low Noise Oscillators

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