scholarly journals Plane Wave Coupling to a Transmission Line Above Ground with Terminating Loads

2019 ◽  
Vol 8 (1) ◽  
pp. 82-90
Author(s):  
L. K. Warne ◽  
S. Campione ◽  
R. S. Coats
Keyword(s):  
Plane Wave ◽  
Transmission Line ◽  
Radiation Effects ◽  
Short Circuit ◽  
Open Circuit ◽  
Simple Circuit ◽  
Transmission Line Model ◽  
Wave Coupling ◽  
Full Wave ◽  
Good Agreement

This paper considers plane wave coupling to a transmission line consisting of an aerial wire above a conducting ground. Simple circuit models are constructed for the terminating impedances at the ends of the line including radiation effects. We consider the following load topologies: open circuit, short circuit, and grounded rods. Results from the transmission line model with these loads show good agreement with full-wave simulations.  

scholarly journals Lightning Response of Multi-Port Grids Buried in Dispersive Soils: An Approximation versus Full-wave Methods and Experiment

2019 ◽  
Vol 8 (1) ◽  
pp. 43-50 ◽  
Author(s):  
S. S. Sajjadi ◽  
S. R. Ostadzadeh
Keyword(s):  
Transmission Line ◽  
Transient Analysis ◽  
Transmission Line Model ◽  
Electrical Parameters ◽  
Full Wave ◽  
Grounding Grids ◽  
Wave Methods ◽  
Dispersive Soils ◽  
Good Agreement ◽  
Dispersive Soil

In this paper, application of multi-conductor transmission line model (MTL) in transient analysis of grounding grids buried in soils with frequency-dependent electrical parameters (dispersive soil) is investigated. In this modeling approach, each set of parallel conductors in the grounding grid is considered as a multi-conductor transmission line (MTL). Then, a two-port network for each set of parallel conductors in the grid is then defined. Finally, the two-port networks are interconnected depending upon the pattern of connections in the grid and its representative equations are then reduced. Via solving these simplified equations, the transient analyses of grounding grids is efficiently carried out. With the aim of validity, a number of examples previously published in literature are selected. The comparison of simulation results based on the MTL shows good agreement with numerical and experimental results. Moreover, in despite of numerical methods computational efficiency is considerably increased.

Time Domain Investigation of the Plane Wave Coupling to a Non-Lineary Loaded Transmission Line Network

2019 ◽  
Author(s):  
Johanna Kasper ◽  
Mathias Magdowski ◽  
Ralf Vick ◽  
Linar Galeev ◽  
Genadii Iukhtanov ◽  
...  
Keyword(s):  
Plane Wave ◽  
Transmission Line ◽  
Time Domain ◽  
Wave Coupling ◽  
Line Network

scholarly journals Simple circuit models for the terminal properties of a nonlinear closing switch

1992 ◽  
Vol 10 (2) ◽  
pp. 375-385 ◽  
Author(s):  
William A. Johnson ◽  
Larry K. Warne
Keyword(s):  
Transmission Line ◽  
Ferromagnetic Material ◽  
Simple Circuit ◽  
Transmission Line Model ◽  
Line Model ◽  
Approximate Models

Simple circuit models for the terminal properties of a ferromagnetic closing switch are derived under the assumptions that the ferromagnetic material may be described by a hysteresis profile and that the driving H-field quickly becomes large. Comparison with results from a full transmission line model indicates that all but the simplest of these approximate models is extremely accurate for a realistic switch.

An EM Imaging Method Based on Plane-Wave Spectrum and Transmission Line Model

2020 ◽  
Vol 68 (10) ◽  
pp. 4161-4168
Author(s):  
Jia-Chen Zhang ◽  
Xingchang Wei ◽  
Li Ding ◽  
Xian-Ke Gao ◽  
Zi-Xiang Xu
Keyword(s):  
Plane Wave ◽  
Transmission Line ◽  
Wave Spectrum ◽  
Imaging Method ◽  
Transmission Line Model ◽  
Line Model

scholarly journals Expression de la Tension Photovoltaïque Induite par Transition Interbande Dans des Couches Minces de Sulfure de Zinc

1975 ◽  
Vol 2 (2) ◽  
pp. 147-155 ◽  
Author(s):  
A. Tosser ◽  
H. Murray
Keyword(s):  
Experimental Data ◽  
Conduction Band ◽  
Photon Energy ◽  
Open Circuit Voltage ◽  
Sandwich Structures ◽  
Interband Transition ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Good Agreement

En considérant les variations dimensionnelles de la tension photovoltaïque induite en circuit ouvert par des rayonnements lumineux d'énergie supérieure à 3,66 eV dans des structures sandwich Al/ZnS/Au, ainsi que les variations avec le flux lumineux du courant de court-circuit et de la conductance correspondant à la phototransition entre bandes, l'hypothèse d'une quasi-bande de conduction créée par l'ionisation de centres coulombiens est avancée. Elle conduit à une formulation de la tension photovoltaïque en bonne cohérence avec l'expérience.Variations with thickness of open-circuit voltage, short-circuit current and photoconductance associated to interband transition lead to postulate the existence of a quasi-conduction band, associated with ionized coulombic centres, in Al/ZnS/Au illuminated (photon energy > 3,66 eV) sandwich structures. An expression of open-circuit voltage is deduced, in good agreement with experimental data.

Describing Method for Information Protecting Composite Materials

2011 ◽  
Vol 271-273 ◽  
pp. 1070-1073
Author(s):  
Heng Liu ◽  
Zhao Yang Zeng ◽  
Chao Wu
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Transmission Line ◽  
Carbonyl Iron ◽  
Effective Medium Approximation ◽  
Transmission Line Model ◽  
Magnetic Parameters ◽  
Material Good ◽  
Electro Magnetic ◽  
Good Agreement

For the purpose of discussing the potentiality of composite materials in information protecting, the microwave transmitting properties of epoxy-based carbonyl iron composite material was systematically analyzed in this report. The effective medium approximation (EMA) model was used to calculate the electro-magnetic parameters of the material, while the transmission line model was used to calculate the absorption ability of the composite material. Good agreement between calculation and experiments was obtained, which means the rationality of the describing method in this paper.

DIFFRACTION OF MICROWAVES BY LONG METAL CYLINDERS

1955 ◽  
Vol 33 (8) ◽  
pp. 407-419 ◽  
Author(s):  
Albert W. Adey
Keyword(s):  
Plane Wave ◽  
Electric Field ◽  
Transmission Line ◽  
Cross Section ◽  
Parallel Plate ◽  
Rectangular Cross Section ◽  
Circular Cylinders ◽  
Wave Conditions ◽  
Rectangular Cylinders ◽  
Good Agreement

A parallel-plate transmission line has been applied to the study of the amplitude and phase of the diffracted electric field near metal cylinders of circular, square, and rectangular cross-section. The transverse dimensions of the cylinders are comparable with the wavelength (3.280 cm.). A travelling dipole probe inserted in the line through a slot in one of the plates permits investigation of the field. Absorbing wedges at the boundary of the line make the plates effectively infinite in extent. Essentially plane wave conditions exist in the region utilized in the measurements. Good agreement is obtained between calculation and experiment for circular cylinders. Measured results are given for square and rectangular cylinders. For one orientation of the rectangles the measured results are compared with approximate calculations.

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