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The physical constraints underlying the concept of quantum circuit are considered. In particular it is shown that the point of departure for their modeling starts from the interconnection of the components into a classical network, followed by quantization of the latter, and not by the interconnection of already quantized components. The procedure is straightforward for lossless networks but cannot...
A hardware test-bed (HTB) has been developed to realize power system emulation by mimicking the system components with universal three-phase voltage source converters (VSCs). The VSC-based transmission line emulator has also been successfully developed to flexibly represent interconnected ac lines under normal operating conditions. As the most serious short-circuit fault condition, the three-phase...
Modular multilevel converters (MMCs) have become the most promising converter technologies for medium/high-power applications, specifically for high-voltage direct current (HVDC) transmission systems. For the analysis of the large-scale MMCs-embedded power systems, i.e., multiterminal dc (MTDC) systems and dc grids, modeling and simulation plays an important role in transient and fault analysis. However,...
This paper presents two novel microstrip-to-slotline baluns. Their design is based on the slotted microstrip cross-junction and its multi-mode equivalent circuit model, i.e., each slotted microstrip supports two modes that have even and odd symmetry. The first balun is a modified version of the conventional 90° via-less microstrip to slotline one with different microstrip and slotline impedances....
This paper proposes an Unbalanced-to-Balanced (UTB) Gysel type equal Power Divider (PD). Theoretical analysis has been performed to obtain design equations for the PD. UTB equal PD is design at 2 GHz. Based on the design equations, a prototype has been fabricated and measurement has been performed. The proposed PD shows in-phase characteristic. Greater than 20 dB isolation between two balanced ports...
The design of a four-stage common-source (CS) 150 GHz amplifier in a 65nm technology is described. Each stage bases on the proposed technique of coupled transmission line (T-line) neutralization to achieve an improved intrinsic gain. Coupled T-line is also used for impedance matching, including both input and output, and inter stage impedance matching. Simulations show that the proposed amplifier...
Supercapacitor, as a new type of energy storage device, has broad application prospect in the power system and others. It is very significant to establish an accurate model to reflect the actual job characteristics for supercapacitor reasonable use, performance optimization and system simulation. This article summarizes all kinds of supercapacitor model, points out the characteristics of the existing...
This paper describes an accurate circuit model that accounts for the working principles behind the operation of a recently demonstrated planar resonant blazed grating. The strictly planar grating is a simple array of metal strips printed on a conductor-backed substrate. The circuit model provides an analytical description of the perfect blazing caused by resonance in an infinite grating of this kind...
Present and future link (SerDes) design requires a strong and effective coupling between high-speed circuit design, optimization, and digital communications, its problems are different that new solutions are required. This paper proposed an analytical wireline channel model for path loss prediction for effective electronic circuits and systems design. Proposed model closely match experimental data...
With the wide application of electronic equipment, electromagnetic radiation pollution has become the fourth-largest public nuisance after the atmospheric pollution, water pollution, noise pollution. In order to meet the requirements of electromagnetic compatibility, some shielding measures must be taken. Therefore, the study of electromagnetic shielding body's shielding effectiveness analysis and...
Distributed Flexible AC Transmission Systems (D-FACTS) devices can be used as a distributed solution for relieving congestion in transmission lines. In this work, a model for D-FACTS devices is developed in an electromagnetic transients program and steady-state performance is validated against the existing model in PowerWorld. The devices are implemented in the IEEE12 bus dynamic test system. System...
This paper is a step forward in the analysis of generalized time-fractional telegrapher's equation, derived as the mathematical model describing transmission line. Using fractional calculus as a mathematical tool for generalization, memory effects of inductive and capacitive phenomena are included in model. The effect of electrical charge accumulation along the line is taken into account by the topological...
Now voltage sources are widely used for differential signaling. However, a common mode current is excited in unbalance differential transmission line. In this paper, common-mode excitation by differential current sources is compared with that by differential voltage sources in the unbalanced differential transmission line. A equivalent circuit describing the differential transmission line are used...
This paper reports a new development in relation to a recently published algorithm by the authors [1]. The algorithm iteratively searches for a minimum number of phasor measurement units to be added into a power system to meet a prescribed synchrophasor availability (SA). SA constraints impose a resilience requirement in the face of random interruptions in both power and data transmissions. Our earlier...
This paper describes a method for a common transient analysis for the multi-circuit overhead transmission line. The presented algorithm is based on two-port approach, where the phase conductors and earth wires are modelled by inductive and capacitive coupled cascades of two-ports. For a considered network model, a system of ordinary differential equations (ODE) has been formulated and it has been...
An estimation method of the induced current of a transmission line under the bulk current injection (BCI) test is presented. In this method, the influence of the current injected by the BCI probe is expressed using the equivalent voltage and current sources. By modelling the transmission line loaded with the BCI probe as a 3-port network, an absolute value of the induced current of transmission line...
This paper discusses an extension of the conventional single-phase transmission line model with uniformly distributed parameters. The derived model can additionally account for non-uniformities of line impedance along the transmission line which may be due to non-uniformities in external conditions along the line (e.g. wind) affecting electrical parameters. In order to provide understanding of the...
A method for detecting causality violations in tabulated frequency-domain data is presented. The method employs the discrete Hilbert transform for separating the causal and noncausal parts of the tabulated data. Hence, it does not involve a time domain transformation, which prevents effects caused by Gibbs oscillations. In addition, the method allows to determine which frequency bands are responsible...
In this paper, an X-tree clock distribution topology based on standing wave oscillator is introduced. To increase output amplitude at the loading point and saving chip area, a novel CMOS active inductor is designed and applied to each loading points of the network. The cascoded differential active inductor is 1 nH with Q = 344 at 10 GHz. This makes the two stage, 6.2 mm × 6.2 mm dimensional standing...
This research presents a discrete-time transmission line model based on the propagation of travelling waves. In this approach, the transmission line is emulated by means of many interconnected elementary delay cells implemented with switched-capacitor (SC) circuits. The accuracy and limitations of this method is compared to existing transconductance-capacitor (gm-C) solutions and is evaluated in the...
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