International Technology Roadmap for Semiconductors 2003の要求清浄度について － シリコンウエハ表面と雰囲気環境に要求される清浄度, 分析方法の現状について －

Wave propagation and group velocity

By L I Sedov London: Cleaver-Hume Press Ltd Pp xvi + 363 Price 105s This is really two separate books within the same pair of covers First of all Chapters 1-3, some 145 pages, are devoted to the discussion of similarity and dimensional, methods and their application to a variety of problems in mechanics and fluid mechanics

http://iopscience.iop.org/article/10.1088/0031-9112/11/6/008/pdf

Similarity and Dimensional Methods in Mechanics

Vorlesungen uber theoretische Physik Von Prof. Arnold Sommerfeld. Band 1: Mechanik. Vierte, neubearbeitete Auflage. Pp. xii + 276. 18 D. marks. Band 2: Mechanik der deformierbaren Medien. Pp. xv + 376 + 4 plates. 18 D. marks. Band 3: Elektrodynamik. Pp. xvi + 368. 18 D. marks. Band 6: Partielle Differentialgleichungen der Physik. Pp. xiii + 332. 18 D. marks. (Wiesbaden: Dieterich'sche Verlagsbuchhandlung, 1947–1949.)

/pdf/lectures-on-theoretical-physics-4m0v0ffz5s.pdf

Lectures on Theoretical Physics

A new prototype triboelectric nanogenerator with superhydrophobic and self-cleaning features is invented to harvest water drop energy based on a sequential contact electrification and electrostatic induction process. Because of the easy-fabrication, cost-effectiveness, and robust properties, the developed triboelectric nanogenerator expands the potential applications to harvesting energy from household wastewater and raindrops.

Harvesting Water Drop Energy by a Sequential Contact-Electrification and Electrostatic-Induction Process

This paper introduces a hybrid coupler based negative group delay (NGD) topology. The NGD circuit is built with a hybrid coupler with one of output and isolated access ways connected in feedback with a lossy transmission line (TL). It is modelled by S-parameter approach. The NGD topology characteristics are formulated. The synthesis relations enabling to determine the NGD circuit parameters in function of the desired NGD value are extracted. Parametric analyses in function of the TL attenuation and time-delay are discussed.

NGD Synthesizer with Feedback Hybrid Coupler

This paper is devoted on the application of the computational method for calculating the transient electromagnetic (EM) near-field (NF) radiated by electronic structures from the frequency-dependent data for the arbitrary wave form perturbations i(t). The method proposed is based on the fast Fourier transform (FFT). The different steps illustrating the principle of the method is described. It is composed of three successive steps: the synchronization of the input excitation spectrum I(f) and the given frequency data H0(f), the convolution of the two inputs data and then, the determination of the time-domain emissions H(t). The feasibility of the method is verified with standard EM 3D simulations. In addition to this method, an extraction technique of the time-dependent z-transversal EM NF component Xz(t) from the frequency-dependent x- and y- longitudinal components Hx(f) and Hy(f) is also presented. This technique is based on the conjugation of the plane wave spectrum (PWS) transform and FFT. The feasibility of the method is verified with a set of dipole radiations. The method introduced in this paper is particularly useful for the investigation of time-domain emissions for EMC applications by considering transient EM interferences (EMIs).

/pdf/calculations-of-near-field-emissions-in-frequency-domain-s1k23hmoqh.pdf

Calculations of near-field emissions in frequency-domain into time- dependent data with arbitrary wave form transient perturbations

This paper develops a bandpass (BP) negative‐group‐delay (NGD) analysis of multi‐port topology. The circuit under study consists of resistorless symmetric coupler constituted by passive LC‐networks. By using the tensorial‐analysis‐of‐networks (TAN) formalism, an innovative study enables to verify if the four‐port circuit is susceptible to exhibit the unfamiliar BP‐NGD function. Using the TAN formalism, the different steps of the method is described from the branch and mesh spaces via the tensor connectivity to determine the equivalent S‐parameters. The general methodology of the S‐matrix modeling is expressed in the function of the coupler L and C parameters. To validate the BP‐NGD behavior, an arbitrary parametrized lumped four‐port coupler is considered as a proof‐of‐concept. The feasibilities of the TAN S‐parameter modeling added by the BP‐NGD function is validated comparison results between TAN mathematical calculations and simulations from a commercial tool. Excellent correlations between the calculated and simulated results are confirmed with BP‐NGD behavior of the connections between port 1 and port 2 with −30 ns NGD value at the center frequency, 124 MHz, and between port 1 and port 4 with −27 ns NGD value at the center frequency, 92 MHz. The present results confirm a scientific result never being found before, the first time, which demonstrates the possibility to generate the BP‐NGD function with a four‐port resistorless circuit. The TAN method flexibility advantages are the flexibility to lumped and distributed circuits. However, the sensitivity to the component inaccuracies constitute the main drawbacks.

Tensorial‐Analysis‐of‐Networks Applied to Bandpass Negative‐Group‐Delay Analysis of Resistorless LC‐Coupler‐Network

Un nouveau principe de dephaseur actif a phase constante est propose. Ce dephaseur est obtenu par l'association de dispositifs a Temps de Propagation de Groupe (TPG) positif et negatif de meme valeur absolue. Pour le concevoir, nous avons ainsi associe une ligne de transmission classique avec un circuit actif a TPG negatif developpe recemment. Apres realisation d'un prototype en technologie planaire hybride, nous avons mesure une phase constante (independante de la frequence) de -90° ± 5° sur une bande relative d'environ 75 % autour de 1,7 GHz. Les niveaux de gain et d'adaptations mesures sont egalement en tres bon accord avec les simulations. Finalement, des perspectives d'applications sont decrites.

Déphaseur actif large bande à phase indépendante de la fréquence

This paper develops an innovative model of bandpass (BP) negative group delay (NGD) inverted arm topology of parallel lines. The S-matrix model is established from impedance and admittance matrix operations of elementary transmission lines constituting the topology. Parametric analysis is performed to assess the influence of inverted arm structure sizes on the BP NGD specifications. To validate the theoretical concept, a proof of concept is designed in microstrip technology. The calculated and simulated results are in very good agreement. NGD value, center frequency and bandwidth of about −8 ns, 3.6 GHz and 4 MHz, respectively, are observed with insertion loss better than 1 dB and reflection loss better than 18 dB. The innovative NGD physical structure could be an important asset to reduce propagation delay in the upcoming telecommunications systems as the 5G system.

https://hal.science/hal-03629691/document

Blaise Ravelo

Papers

NGD Synthesizer with Feedback Hybrid Coupler

Calculations of near-field emissions in frequency-domain into time- dependent data with arbitrary wave form transient perturbations

Tensorial‐Analysis‐of‐Networks Applied to Bandpass Negative‐Group‐Delay Analysis of Resistorless LC‐Coupler‐Network

Déphaseur actif large bande à phase indépendante de la fréquence

S-matrix-based bandpass negative group delay innovative model of inverted parallel arm distributed topology