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Device, interconnect scaling and interconnection bottleneck are among the major challenges for CMOS scaling. Furhtermore, signal integrity issues like crosstalk-leakage of charge between capacitively coupled nets among neighboring signal lines-is becoming inexorable. We propose to astutely turn this detrimental effect into an advantage by engineering the interference among signal lines. Our proposal...
This paper proposes an equivalent model of the coupling capacitance between TSVs and adjacent RDL. Based on the scalar potential integral equation and cylindrical accumulation mode basis functions, an efficient method of extracting the coupling capacitance is present. The scalability of the proposed model is verified by simulation and our results show that an accuracy of 10% is achieved from the analytic...
A novel capacitive power transfer (CPT) structure through self-capacitance routes is proposed in this paper. Selfcapacitance is the nature property of an isolated conductor which represents the amount of charges that have to be added to a conductor to promote its potential by one unit with respect to infinity. By utilizing the self-capacitance effects, one of the two coupling capacitors for conventional...
This paper introduces a large air-gap capacitive wireless power transfer (WPT) system for electric vehicle charging that achieves a power transfer density exceeding the state-of-the-art by more than a factor of four. This high power transfer density is achieved by operating at a high switching frequency (6.78 MHz), combined with an innovative approach to designing matching networks that enable effective...
Well logging technology is of great significance to oil production. A new lateral resistivity logging-while-drilling (LWD) method applied in oil-based drilling fluid condition is proposed in this paper by combining capacitive coupling with inductive coupling principle. By using a new logging model, the ineffectiveness of the conventional resistivity LWD methods in oil-based drilling fluid is overcome...
For a wireless transmission system, low efficiency is the most serious problem. Proper capacitance compensation for the system is expected to reduced reactive power and improve system efficiency. In present paper, system performances are studied and compared in two cases, no compensation and compensated by series capacitance. Then variation trend of transmission efficiency with other parameters (frequency,...
Traditional half bridge dual buck inverter (DBI) has a low power density due to the employing of two large input capacitances and two discrete output inductors. Magnetic integration is an effective method to enhance power density. However, unexpected circulating current may be induced by adopting conventional magnetic integration scheme. This paper proposes a novel magnetic integrated DBI inverter,...
This paper introduces a very-high-power-transfer-density GaN-based capacitive wireless power transfer (WPT) system, suitable as one module of a multi-modular WPT system for charging of electric forklifts. This capacitive WPT system achieves very high power transfer density by operating at a high switching frequency (6.78 MHz) using a GaN-based inverter, and by utilizing innovatively designed L-section...
An efficient semi-numeric boundary element method for the calculation of the response of interdigitated touch sensors is introduced and used to demonstrate interesting properties of embedded printed capacitive touch sensors on steel substrates. The strength of the method is that layer compositions with finite conductivity and arbitrary sequence of layer permittivities can be calculated efficiently...
This paper proposes a contactless power supply system for automated guided vehicles (AGVs) with a topology of two receiving coils. The study features balanced dual output capability for charging motors of the front and the back wheel of AGVs simultaneously, and they can be charged while moving along the rail. The equivalent resonance circuit configuration is established and characteristics of mutual...
In order to analyze the problem of signal power frequency interference when the single end of the sensor is connected to the ground. The circuit model of the power frequency crosstalk voltage on the core wire is established. The electromagnetic field distribution around the shielding layer is analyzed base on the finite element software ANSYS. And the calculation formula of crosstalk voltage on cable...
This paper presents an investigation of a new wireless power transmission (WPT) system based on magnetic resonant coupling with introduced directional or additional coupled inductances. Two coupled resonant circuits reveal two resonant frequencies with highest efficiency of power transfer. It is suggested that a directional coupler or two additional coupled inductances can be used to track these resonant...
This paper describes the investigation on relative bandwidth, frequency range and thermal properties of the high directivity planar couplers realized in microstrip line technology. The basic idea is that coupling structure is attached to two transmission lines at two points only. The coupling structure is realized using SMD capacitances and inductances soldered to the microstrip lines. Frequency limit...
The benefits of emerging wide-band gap semiconductors can only be utilized if the semiconductor is properly packaged. Capacitive coupling in the package causes electromagnetic interference during high dv/dt switching. This paper investigates the current flowing in the parasitic capacitance between the output node and the grounded heat sink for a custom silicon carbide power module. A circuit model...
Lithium niobate (LN) based thin film piezoelectrics have being extensively explored [1-3] for the making of high coupling and high performance resonators. The most important bottleneck for the use of LN film is related to fabrication process and it is particularly challenging when a bottom electrode is included in the stack to increase the film capacitance per unit area. We have explored Y-cut LN...
The most important bottleneck for the use of lithium niobate (LN) films for making MEMS resonators is related to the fabrication process and it is particularly challenging when a bottom electrode needs to be included in the film stack to increase the resonator's capacitance per unit area. In this work, we propose to access the bottom electrode by using capacitive coupling rather than a direct resistive...
This paper studies a capacitive coupling wireless power transfer (CCWPT) for charging electric vehicles by using the dielectric substrate outside of a vehicle. The CCWPT can replace a conventional inductive coupling wireless power transfer because it has less electro-magnetic interference (EMI) and heat dissipation. However, since the CCWPT has limitation on transferring high power due to too small...
A novel parallel-coupled microstrip feed line is proposed. The feed relies on the capacitance contribution arising from the capacitances occurring at adjacent split sections in order to lower the high intrinsic input impedance common to microstrip patch antennas. It is expected that the capacitance contribution will enhance the frequency pattern of the microstrip passive and thus overcome the narrow...
Capacitive couplers used in proximity communication suffer from large insertion loss due to the parasitic capacitances in the channel path. This paper proposes two active equalization techniques that reduce channel losses by 10 and 15 dB respectively when using a 3 by 1.5 mm coupler at a gap distance of 0.5 mm. The reduced loss allows for better bit-error-rate (BER), lower power, smaller coupler size...
This paper presents a theoretical treatment of common-mode (CM) and differential-mode (DM) interaction that is known to exist in switch-mode converter systems. This analysis demonstrates that one important metric for evaluating this interaction (displacement currents through the module baseplate) can be quantitatively predicted through theoretical analysis of two types of asymmetry in the converter...
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