Frequency characteristic of power efficiency for 10 W/30 W-class 2GHz band GaN HEMT amplifiers with harmonic reactive terminations

Tong, Yao; Ishikawa, Ryo; Takayama, Yoichiro; Honjo, Kazuhiko; Kikuchi, Hiroyoshi; Okazaki, Takashi; Ueda, Kazuhiro; Otobe, Eiichiro

doi:10.1109/apmc.2013.6694917

Cited by 11 publications

(12 citation statements)

References 7 publications

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“…It is the only process potentially observable at the LHC that can give access to the quartic couplings among two Higgs bosons and a pair of gluons or of top quarks, as well as to the Higgs trilinear self-coupling. Previous studies of this reaction mostly focused on the extraction of the trilinear coupling in the context of the SM [3][4][5][6][7][8][9][10][11]. An analysis based on the wider EFT perspective, however, can give access to a much richer spectrum of information on the UV dynamics.…”

Section: Introductionmentioning

confidence: 99%

Effective field theory analysis of double Higgs boson production via gluon fusion

et al. 2015

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We perform a detailed study of double Higgs production via gluon fusion in the Effective Field Theory (EFT) framework where effects from new physics are parametrized by local operators. Our analysis provides a perspective broader than the one followed in most of the previous analyses, where this process was merely considered as a way to extract the Higgs trilinear coupling. We focus on the hh → bbγγ channel and perform a thorough simulation of signal and background at the 14 TeV LHC and a future 100 TeV proton-proton collider. We make use of invariant mass distributions to enhance the sensitivity on the EFT coefficients and give a first assessment of the impact of jet substructure techniques on the results. The range of validity of the EFT description is estimated, as required to consistently exploit the high-energy range of distributions, pointing out the potential relevance of dimension-8 operators. Our analysis contains a few important improvements over previous studies and identifies some inaccuracies there appearing in connection with the estimate of signal and background rates. The estimated precision on the Higgs trilinear coupling that follows from our results is less optimistic than previously claimed in the literature. We find that a ∼ 30% accuracy can be reached on the trilinear coupling at a future 100 TeV collider with 3 ab −1 . Only an O(1) determination seems instead possible at the LHC with the same amount of integrated luminosity.

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Section: Introductionmentioning

confidence: 99%

Effective field theory analysis of double Higgs boson production via gluon fusion

et al. 2015

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“…Table 2 summarizes the power performance of S-band GaN FET PAs with moderate output power (<12 W) [9–12]. The power efficiencies achieved with the present compact PA compares favorably well with those of the state-of-the-art PAs.…”

Section: Discussionmentioning

confidence: 85%

“…The sharp decrease in PAE at 2.11 GHz results from the 2 nd harmonic source impedance approaching the worst impedance conditions point which tends to be located close to the 2 nd harmonic optimum source impedance [8]. Table 2 summarizes the power performance of S-band GaN FET PAs with moderate output power (<12 W) [9][10][11][12]. The power efficiencies achieved with the present compact PA compares favorably well with those of the state-of-the-art PAs.…”

Section: Modern Mobile Communication System Requires High-efficiencymentioning

confidence: 99%

Novel DC-biasing circuits with arbitrary harmonics-control capability for compact high-efficiency power amplifiers

Tanaka¹,

Oda

Saiki

2019

Int. J. Microw. Wireless Technol.

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The next generation mobile communication systems impose challenging performance, size, and cost requirements on the power amplifiers (PAs). This paper presents novel DC-biasing circuits, which are compact and yet can control the harmonics almost arbitrarily. The proposed circuit consists of a composite right-/left-handed (CRLH) transmission line (TL) stub, of which the size and harmonics-control function can be tuned by modifying the dispersion diagram of the stub line. As a proof of concept, a compact 2-GHz 7-W GaN HEMT class-F PA using the versatile CRLH-TL stubs was fabricated, demonstrating 85.8% drain efficiency and 77.3% power-added efficiency.

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“…Source and load sides of the second harmonic impedance have a considerable effect on the efficiency of PAs. For administrating the bandwidth and efficiency, in [94] a source-side second harmonic impedance control is considered and the approach is based on the harmonic reactive termination [95]. Here, quarter-wavelength open-ended stubs for the harmonics are used.…”

Section: Regression Dnn Design Parametersmentioning

confidence: 99%

Optimization techniques for analog and RF circuit designs: an overview

Kouhalvandi

Ceylan²,

Özoğuz

2020

Analog Integr Circ Sig Process

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Optimizations have gained much consideration from the researchers working in the domains of analog and radio frequency (RF), recently. Dealing with highly nonlinear behavior of active components and aiming to meet design specifications are common issues in all nonlinear circuit designs. As a consequence and accordingly, many studies have been conducted on diverse optimization methods and algorithms for tackling the design problems and meeting optimal solutions with high accuracy. The main purpose of this article is to provide a comprehensive and systematic literature review for the optimization approaches applied by the researchers for designing various analog and microwave circuits. We focus on considering the existing optimization methods from the newly published optimization methods in the last decade. Thus, this study can guide and enlighten complementary metal-oxide-semiconductor analog and RF microwave circuit designers to consider optimization methods commonly used in both areas and to expand conventional performance figures used in their area.

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Frequency characteristic of power efficiency for 10 W/30 W-class 2GHz band GaN HEMT amplifiers with harmonic reactive terminations

Cited by 11 publications

References 7 publications

Effective field theory analysis of double Higgs boson production via gluon fusion

Effective field theory analysis of double Higgs boson production via gluon fusion

Novel DC-biasing circuits with arbitrary harmonics-control capability for compact high-efficiency power amplifiers

Optimization techniques for analog and RF circuit designs: an overview

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