transmission line





Transmission line calculator
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There was developed and has been in use in the Bell Telephone Laboratories for a number of years a particularly useful form of calculator for solving radio transmission line problems. The calculator was originally described in Electronics* where it was presented in cut-out

On the analysis of general multiconductor transmission line networks
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Starting from the graph describing the topology of a transmission line network in terms of junctions and tubes, this note addresses the formation of the overall network equation referred to as the BLT equa tion. The matrix equation of propagation on a tube consisting

Modeling of transmission line exposure to direct ligbtning strokes
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The paper introduces a new model for assessing the exposure of free-standing structures and horizontal conductors above flat ground to direct lightning strokes. The starting point of this work is a recently developed criterion for positive leader inception, modified to account

Novel zeroth-order resonance in composite right/left-handed transmission line resonators
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A novel resonator using a composite right/left-handed (CRLH) transmission line (TL) is presented and its extraordinary resonant characteristics with an infinite-wavelength wave are discussed. The resonance corresponds to the zeroth-order on the analogy of the

Transmission line (TL) approach of left-handed (LH) materials
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Page 1. Microwave Electronics Lab Transmission Line (TL) Approach of Left-Handed (LH) Materials Christophe Caloz, Hiroshi Okabe, Taisuke Iwai and Tatsuo Itoh Electrical Engineering Department University of California, Los Angeles Page 2. Microwave Electronics Lab LH-TL

Study of a novel planar transmission line
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ABSTRACT A new type of monolithic planar transmission line is pro-posed. This line can operate without the need for via-holes or the use of air-bridges for ground equalization. Furthermore, it has shown the tendency to radiate less than the conventional microstrip or

A modified transmission line model for lightning return stroke field calculations
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Modifications to the transmission line model developed at the High Voltage Research Institute, Tomsk, USSR, are presented and compared between each other and with the modification proposed by the Italian-Swiss research team. The modifications considered

Transmission line fault detection phase selection using ANN
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A novel application of neural network approach to protection of transmission line is demonstrated in this paper. Different system faults on a protected transmission line should be detected and classified rapidly and correctly. This paper presents the use of neural

Wireless sensor network design for transmission line monitoring, metering, and controlling: introducing broadband over power lines-enhanced network model
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This paper introduces the broadband over power lines-enhanced network model (BPLeNM) that is suitable for efficiently delivering the generated data of wireless sensor networks (WSNs) of overhead high-voltage (HV) power grids to the substations. BPLeNM exploits the

An In- Line Power Monitor for HE11 Low Loss Transmission Lines
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ABSTRACT A power monitor has been developed for the DIII D 110 GHz EC transmission line , which allows for the measurement of power flowing in the transmission line before it reaches the launcher. The power monitor uses a small break in the transmission line to A distributed transmission line network for connecting a plurality of DUTs to a low-power driver includes a plurality of distributed transmission lines with distributed capacitors. The distributed capacitors are added to the distributed transmission lines to make the

Innovative solutions improve transmission line protection
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Previously presented at the 12th Annual CEPSI Exhibition, November 199 1998 International Conference Modern Trends in the Protection Schemes of Electric Power Apparatus and Systems, October 199 and 52nd Annual Georgia Tech Protective Relaying Conference, May

Extraction of subterahertz transmission line parameters of coplanar waveguides
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Building on our previous work that compared computed propagation characteristics of picosecond pulses on coplanar waveguides (CPWs) with experiments, we extract transmission line parameters, including resistance, inductance, conductance, and

Transmission line faults classification using wavelet transform
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Power system fault identification using information conveyed by the wavelet analysis of power system transients is proposed for detecting types of transmission line faults. The work presented in this paper is focused on identification of simple power system faults. Discrete

Limitation of transmission line switching overvoltages using switchsync relays
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When an overhead transmission line is energized by closing the line circuit breaker, some switching transients are generated in the power system including the line and the supply network. A traditional method for limiting switching overvoltages to acceptable levels is use

Fault classification of double circuit transmission line using artificial neural network
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This paper addresses the problems encountered by conventional distance relays when protecting double-circuit transmission lines. The problems arise principally as a result of the mutual coupling between the two circuits under different fault conditions; this mutual

Model characterizes transmission line transformers
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Recently, Abrie obtained two different equations that provide separate descriptions of the behavior at low and high frequencies . He verified that different currents in the two line conductors must be considered. Shimada derived the input impedance of a 1: 1 balun using

Application of transmission line surge arresters to reduce switching overvoltages
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In this paper switching overvoltages of an actual transmission line are studied. Simulations are executed using Electro Magnetic Transients Program. Analyses are performed in two stages. In the first stage the conventional system without any arresters along the

Power line carrier channel application considerations for transmission line relaying
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While the application of Power- Line Carrier is not new to the power utility industry, the people who have historically worked on this type of equipment are leaving the industry, thereby creating a tremendous void in the expertise available. This paper is a tutorial that

Generalized transmission line equations
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Generalized transmission line equations (GTLEs) are derived by circuit theory, and equation parameters are determined by the method of moments (MoM). In comparison with conventional transmission line equations (CTLEs), the new equations have added two new







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