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.)

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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 develops a cancellation method of cable delay. The proposed method is based on the low-pass negative group delay (NGD) function. The NGD circuit is constituted by a resistor and RC-parallel network mounted in L-cell and a non-inverter amplifier. The design equations of the NGD circuit are established in function of the cable delay and the operated signal bandwidth. The feasibility of the delay cancellation method is verified with simulations of network constituted by three parallel cables with 2 m, 4 m and 6 m physical lengths. Due to the low-pass NGD function, time-domain results show the cable delay cancellation effect. The cable outputs are synchronized with the pulse input signal with 0.25 µs duration.

Cable Delay Cancellation with Low-Pass NGD Function

This article describes an extraction technique of input and output impedances of integrated circuits (ICs) implemented onto the printed circuit boards (PCBs). The feasibility of the technique is illustrated with a proof-of-concept (POC) constituted by two ICs operating in a typically transmitter-receiver (Tx-Rx) circuit. The POC system is assumed composed of three different blocks of emitter signal source, load and interconnect passive network. This latter one is assumed defined by its chain matrix known from its electrical and physical characteristics. The proposed impedance extraction method is elaborated from the given signals at the transmitter output and receiver input. The terminal access impedances are formulated in function of the parameters of the interconnect system chain matrix. The feasibility of the method is checked with a passive circuit constituted by transmission lines driven by voltage source with RL-series network internal impedance and loaded at the output by the RC-parallel network. Good correlation between the access impedance reference and calculated is found.

https://aemjournal.org/index.php/AEM/article/download/854/374

PCB access impedances extraction method of in-situ integrated circuit

This paper investigates a negative group delay (NGD) design of Ulu geometrical shape
circuit. The NGD basic topology is constituted by a coupled line coupler with two-port terminated by
open-ended stub. The S-matrix model of the topology is presented. The design equations allowing to
determine the NGD circuit parameters in function of the NGD function specifications, NGD center
frequency, NGD values and insertion loss are presented. As proof of concept, a microstrip circuit is
designed and fabricated. As expected, the tested results confirm that the circuit behaves as bandpass NGD
function. The modeled, simulated and measured results are in good correlation. The POC operates with
tri-band NGD behavior with center frequencies around 0.645, 1.285, and 1.87 GHz with NGD values of
about ?3.5, ?2, and ?1 ns, respectively.

Design Engineering of Tri-Band Ulu-Shape NGD Circuit

This study investigates an innovative theory on design of dielectric resonator (DR) based negative group delay (NGD) microwave circuit. The NGD circuit is mainly constituted by a cylindrical bulk of DR as a coupling element with a microstrip line. The developed theory is analytically established from the S-parameters modeling of this innovative DR NGD topology. The NGD analysis and synthesis equations are formulated by considering the key parameters of the DR NGD cell. The NGD existence condition as a function of the DR and microstrip line parameters is also introduced. The behavioral response of the bandpass NGD function is verified with different designed proof-of-concepts (POCs). The developed NGD DR topology was validated with original circuit design by commercial simulations and experimentations with insertion and reflection losses lower than 4 and 10 dB, respectively. The POC prototypes operate with low attenuation losses in mono band and dual bands up to 10 GHz. Single NGD cells with DR coupled with “I” and “U” shape microstrip lines operating at different central frequencies were designed and implemented. Then, dual-band NGD circuits operating at approximately 2.5 and 5 GHz were also tested. The possibility to widen the NGD bandwidth with double DR NGD circuits was investigated.

Dielectric Resonator Negative Group Delay Circuit

The paper presents a reduced modeling method of a microstrip interconnect for the signal integrity (SI) applications. First- and second- order polynomial models of interconnects based on distributed RLCG model of a transmission line are investigated. Model accuracies are compared with exact circuit/EM co-simulations for a typical high-speed 20 µm-wide microstrip interconnect on Alumina substrate for varying interconnect lengths between 1 and 10 mm and for signal data rates between 1 and 10 Gbit/s. It is shown that the second-order model has a relative amplitude and phase errors lower than 1% from DC to 40 GHz. Also, the second-order model predicts very well the time-domain response to a pulse signal, making it suitable for the accurate prediction of the degradation of RF/digital signals in the high-speed integrated systems.

https://ieeexplore.ieee.org/iel5/6064642/6078493/06078600.pdf

Blaise Ravelo

Papers

Cable Delay Cancellation with Low-Pass NGD Function

PCB access impedances extraction method of in-situ integrated circuit

Design Engineering of Tri-Band Ulu-Shape NGD Circuit

Dielectric Resonator Negative Group Delay Circuit

Investigation of reduced models of capacitive loaded interconnects for the high-speed SI applications