An Extraction of Two-Port Noise Parameters From Measured Noise Powers Using an Extended Six-Port Network

Ahmed, Abdul‐Rahman; Yeom, Kyung‐Whan

doi:10.1109/tmtt.2014.2345693

Cited by 17 publications

(10 citation statements)

References 23 publications

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“…첫 번째 방법은 6-포트 회로망을 이용한 잡음 파라미터 측정 방법이며 [5]～ [8] , 두 번째 직접 측정방 법은 4개의 입력 임피던스에 대해 DUT의 잡음전력을 측 정하고, 측정된 잡음전력을 이용하여 잡음상관행렬 및 잡 음 파라미터를 계산하는 방법이다 [8] . [9], [10] .…”

Section: ⅰ 서 론unclassified

Measurement Method of Noise Correlation Matrix Using Relative Noise Ratio

Lee

Yeom²

2016

The Journal of Korean Institute of Electromagnetic Engineering

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In general, noise measurement results show larger random ripple than those of the network analyzer. The reason for the lager random ripple of the noise measurements is considered that the general noise measurements uses absolute measured noise powers, while the network analyzer measures using a ratio of the measured powers. In this paper, a novel measurement method of noise correlation matrix using relative noise ratios is proposed. Proposed method measures the five noise powers of DUT for the five input impedance variations and the four relative noise ratios are formed using the five measured noise powers. The four noise ratios are used to compute the noise correlation matrix and noise parameters. The resulting noise parameters for a 0.5 dB attenuator show good agreements with theoretical values calculated by S-parameters. Also, the noise parameters of an active DUT with a noise figure of less than 1 dB are measured and the measured results show a small random ripple as expected and their values are physically acceptable. In conclusion, the proposed method can be applied to the noise parameter measurements for DUT with a noise figure below 1 dB.

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Section: ⅰ 서 론unclassified

Measurement Method of Noise Correlation Matrix Using Relative Noise Ratio

Lee

Yeom²

2016

The Journal of Korean Institute of Electromagnetic Engineering

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“…The authors presented a technique [28] for noise parameters extraction that makes use of an 8-port extension of the 6-port network. The necessity for the 8-port extension arose from the need to allow for simultaneous connection of an external noise source and the DUT during measurement.…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost Noise Wave Correlator for Noise Parameters Extraction by Cold Noise Power Measurement

Ahmed¹,

Yeom²

2016

IJWMT

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Conventionally, the noise parameters of a Device under Test (DUT) which generally characterize the noise performance of the DUT, are obtained via the impedance tuner technique. The authors have previously presented a technique which eliminates the need for impedance tuner, and rather employs an 8-port network that enables the extraction of the noise correlation matrix of a given DUT and thus its noise parameters. In this paper, we present a further simplification of the 8-port network technique, which also eliminates the need for a conventional external noise source. Cold noise powers emanating from a DUT are measured via a 6-port network with the aid of matched termination. The measured noise powers provide sufficient information for determining the noise wave correlation matrix of a DUT, which are then converted into the conventional 2-port noise parameters. The proposed technique is simple, fast and is verified to give a good estimation of the noise parameters of selected DUTs.

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“…The scattering matrices and the wave approach have appeared as an efficient tool for computer-aided design of networks working at microwave frequencies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The wave approach gives the possibility to treat the network noise in terms of incident and reflected waves, thus being compatible with the scattering matrix description of microwave networks.…”

Section: Introductionmentioning

confidence: 99%

Wave approach for noise modeling of gallium nitride high electron‐mobility transistors

Ɖorđević¹,

Marinković

Crupi

et al. 2015

Int J Numerical Modelling

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The wave approach has appeared as a very efficient tool for modeling as well as for measurements of noise parameters of microwave transistors. Having in mind the attractiveness of transistors in gallium nitride technology in modern communication systems, where it is very important to keep the noise on a low level and, thus, to have accurate transistor noise models, in this paper, the wave approach is applied for the noise modeling of high electron-mobility transistor in gallium nitride technology. The noise wave representation of the transistor intrinsic circuit noise is used, where the noise wave parameters are modeled by exploiting the artificial neural networks. The modeling results, compared with the measured data and with those obtained by the conventional noise equivalent circuit model, provide a verification of the developed model accuracy.

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An Extraction of Two-Port Noise Parameters From Measured Noise Powers Using an Extended Six-Port Network

Cited by 17 publications

References 23 publications

Measurement Method of Noise Correlation Matrix Using Relative Noise Ratio

Measurement Method of Noise Correlation Matrix Using Relative Noise Ratio

A Low-Cost Noise Wave Correlator for Noise Parameters Extraction by Cold Noise Power Measurement

Wave approach for noise modeling of gallium nitride high electron‐mobility transistors

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