A new 4-port S-parameter de-embedding methodology is presented. This de-embedding technique considers distributed on-wafer parasitics in the millimeter wave band (f > 30 GHz). The procedure is based on simple analy...
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A new 4-port S-parameter de-embedding methodology is presented. This de-embedding technique considers distributed on-wafer parasitics in the millimeter wave band (f > 30 GHz). The procedure is based on simple analytical calculations and requires no equivalent circuit modeling or elec.romagnetic simulations. Using both EM theory and HP-ADS simulations, we show that this technique can be used to accurately extract the S-parameters to frequencies higher than 100 GHz for state-of-the-art SiGe HBTs with a maximum cutoff frequency of 180 GHz. This method is also valid for use in decoupling package parasitic.
Advances in LAN technology have enabled fast data transmission. However, without effective management of these resources, congestion of networks as well as waste of resources are inevitable. Therefore, it is necessary...
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Various issues related with location aware computing that can provide basis for novel techniques of resource management, potentially improving the user experience, are discussed. The system notifies the user that suff...
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Various issues related with location aware computing that can provide basis for novel techniques of resource management, potentially improving the user experience, are discussed. The system notifies the user that sufficient bandwidth is available at a gate only a few minutes away. The ability to manage information about the availability of devices on the basis of their location is an enabling technology for various applications. A trajectory can be constructed using an elec.ronic map geocoded with distance and travel time information for every road section.
In this paper, we present a reliable congestion control mechanism for geocasting in mobile wireless networks. Our protocol can be used as an extension to conventional multicasting protocols in order to overcome the pr...
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A novel design technique for closed-loop amplifier circuits, suited to very low supply voltages, is proposed. It is based on the use of quasi-floating gate MOS transistors, thus avoiding issues encountered in true flo...
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A novel design technique for closed-loop amplifier circuits, suited to very low supply voltages, is proposed. It is based on the use of quasi-floating gate MOS transistors, thus avoiding issues encountered in true floating-gate MOS structures such as initial floating gate charge and Gain-Bandwidth product degradation. A programmable-gain inverting amplifier, a Digital to Analog Converter, and a Sample and Hold circuit, all based on this technique, are presented along with simulation results, thus illustrating the proposed approach.
An efficient finite-element formulation for the simulation of ultrashort optical pulses is thoroughly presented. This numerical propagator, capable to take into account spatial and temporal effects, incorporates a wid...
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An efficient finite-element formulation for the simulation of ultrashort optical pulses is thoroughly presented. This numerical propagator, capable to take into account spatial and temporal effects, incorporates a wide-angle-band Padé approach and perfectly matched layers (PML) at the truncated boundaries. Its effectiveness and higher performance over other similar approaches are clearly demonstrated through key simulations.
This paper presents an efficient method to evaluate the performance of an extended stochastic Petri net by simple algebraic operations. The reachability graph is derived from an extended stochastic Petri net, and then...
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This paper presents an efficient method to evaluate the performance of an extended stochastic Petri net by simple algebraic operations. The reachability graph is derived from an extended stochastic Petri net, and then converted to a timed stochastic state machine, using a semi-Markov process. The n-th moments of the performance index are derived by algebraic manipulations with each of the n-th moments of transition time and transition probability. For the derivation, three reduction rules are introduced on the transition trajectories in a well-formed regular expression. Efficient computation algorithms are provided to automate the suggested method. The presented method provides a proficient means to derive both the numerical and the symbolic solutions for the performance of an extended stochastic Petri net by simple algebraic manipulations.
A recently proposed analog cell suited to low-voltage and low power operation and named "flipped voltage follower" is applied to the design of current conveyors. Two alternative topologies are presented, bot...
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A recently proposed analog cell suited to low-voltage and low power operation and named "flipped voltage follower" is applied to the design of current conveyors. Two alternative topologies are presented, both operating at 1.5V and featuring simplicity, compactness, low power consumption and bandwidths up to 100 MHz for a 0.5μm CMOS technology. As an application example, a universal biquadratic filter is designed and simulated.
This paper investigate the feasibility of elec.romagnetic field reduction by optimisation of phase relationship in 3-phase systems. Various transmission line phase positions are presented, which features minimum elec....
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ISBN:
(纸本)0889863350
This paper investigate the feasibility of elec.romagnetic field reduction by optimisation of phase relationship in 3-phase systems. Various transmission line phase positions are presented, which features minimum elec.romagnetic effect on surface level. Numerical optimisation using recurrent Finite Difference Method (FDM) simulation is a promising direction in selec.ing safe design. In this respect the present paper introduces a rigorous application of FDM for calculation and studying purposes. Different transmission line structure designs have been investigated in order to selec. the maximum phaser cancellation in 3-phase systems. Results are compared with the Pinjar-Northern Terminal Design in Western Australia for demonstration and verification purposes. A deeper insight to the effects of changing the transmission line design has been presented, giving more understanding to the elec.romagnetic field reduction within the existing right-of-way. All designs have been taken based on existing tower configuration and associated parameters, a knowledge base or design rules, main tower dimensions, subconductor radii, bundle configuration and relative cost. Measurements were performed and the successful large reduction of elec.ric and magnetic fields could be clearly identified. Examples of existing power lines and projects show practical applications.
The paper objectives are to undertake a sch.me based on the Finite Difference Method for the calculation and analysis of the elec.romagnetic fields established by currents in power transmission lines, particularly by ...
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ISBN:
(纸本)0889863350
The paper objectives are to undertake a sch.me based on the Finite Difference Method for the calculation and analysis of the elec.romagnetic fields established by currents in power transmission lines, particularly by those in single-phase-to-earth fault condition. This paper introduces a physical example for evaluation of the elec.romagnetic field coupling between a power transmission line and a pipeline buried in the body of the earth. These results are based on practical measurements for the elec.ric and magnetic field on the pipeline. The original motivations of this research are to analyze the elec.romagnetic interference effects of transmission line upon nearby pipelines and describe comprehensive solutions together with its software implementation that can investigate these effects. The research results of the project will have immediate and have practical applications to the pipeline and power industries.
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