Generalized transmission-line theory for the treatment of nonuniform multiconductor transmission lines

2003 ◽  
Vol 17 (1-3) ◽  
pp. 149-156 ◽  
Author(s):  
Heiko Haase ◽  
Jürgen Nitsch
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Transmission Line Theory ◽  
Multiconductor Transmission Lines ◽  
Line Theory

scholarly journals On Heaviside's contributions to transmission line theory: waves, diffusion and energy flux

2018 ◽  
Vol 376 (2134) ◽  
pp. 20170457
Author(s):  
Christopher Donaghy-Spargo
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Physical Nature ◽  
Electromagnetic Theory ◽  
Electrical Transmission ◽  
Important Work ◽  
Transmission Line Theory ◽  
Energy Current ◽  
Electrical Transmission Line ◽  
Line Theory

This paper surveys some selected contributions of Oliver Heaviside FRS (1850–1925) to classical electromagnetic theory and electrical engineering science. In particular, the paper focuses on his contributions to the development of electrical transmission line theory and his deep insights into the ‘physical’ nature of the phenomena relating to nineteenth century telegraphic problems. Following a brief historical introduction to the life of Heaviside to put his achievements in context, we explore his contributions to the reformulation of Maxwell's equations and the understanding of electromagnetic wave propagation along the external region of transmission lines. This leads naturally to his researches regarding the electromagnetic diffusion process inside the line conductors and his subsequent realization that the circuital parameters, usually assumed constant, are not always so. Finally, taking both these internal and external viewpoints of the conductors, his important work regarding the flow of energy described by his ‘energy current’ concept is presented. This article is part of the theme issue ‘Celebrating 125 years of Oliver Heaviside's ‘Electromagnetic Theory’’.

scholarly journals Development of a Mobile Application for Teaching Transmission Line Theory

2019 ◽  
Vol 13 (02) ◽  
pp. 78 ◽  
Author(s):  
Khalid Salmi ◽  
Hamid Magrez ◽  
Hanane Sefraoui ◽  
Abdelhak Ziyyat
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Mobile Application ◽  
Travelling Waves ◽  
Transmission Line Theory ◽  
Practical Applications ◽  
Load Matching ◽  
Virtual Tools ◽  
Line Theory ◽  
At Home

<p>The teaching of transmission line theory in electrical engineering courses must be tailored to an audience which is increasingly reluctant to adhere to abstract disciplines. In our opinion, the best solution to make transmission line courses more attractive is to offer practical applications and intensively use of mathematical computer-aided teaching tools to overcome, at the beginning, the difficulties linked to the theory. Indeed, transmission line theory comes alive when the travelling waves are animated on a screen (smartphone, tablets, laptop, etc.). Fundamental concepts such as “progressive wave”, “reflected wave” and “load matching” could be easily demonstrated in the classroom or at home. Transmission line simulations are applied to problems using connections to shunt, open, matched and unmatched loads, and show how the signal waveforms arise from one end to another. The proposed Android-based animations are used with a sinusoidal generator to illustrate the evolution to the sinusoidal steady state and allow learners to easily handle the corresponding Smith chart. Students are encouraged to run those applications at home as a computational laboratory to verify their solutions to homework problems. <br />This article introduces simple Android-based virtual tools for the investigation and visualization in real time of waves traveling along a terminated finite-length transmission line, without and with faults between the source and the load. The package can be used as an educational tool in various lectures or homework to aid teaching high frequency electronics and transmission lines theory.</p>

Frequency Response of Blocked Annular Fluid Transmission Lines

1981 ◽  
Vol 103 (4) ◽  
pp. 366-369
Author(s):  
M. E. Franke ◽  
G. R. Farney ◽  
E. F. Moore
Keyword(s):  
Transmission Line ◽  
Frequency Response ◽  
Transmission Lines ◽  
Transmission Line Theory ◽  
Line Theory ◽  
Theory And Experiment

Frequency response measurements on blocked annular pneumatic transmission lines with five different radius ratios have been obtained and compared with annular transmission line theory. The agreement between theory and experiment was good.

scholarly journals On the applicability of conventional transmission line theory within cavities

2006 ◽  
Vol 4 ◽  
pp. 117-123 ◽  
Author(s):  
F. Gronwald
Keyword(s):  
Transmission Line ◽  
Integral Equations ◽  
Transmission Lines ◽  
Free Space ◽  
Transmission Line Theory ◽  
Line Theory ◽  
Antenna Mode

Abstract. We investigate whether or not conventional transmission line theory needs to be modified if transmission lines are considered that are located in a cavity rather than in free space. Our analysis is based on coupled Pocklington's equations that can be reduced to integral equations for the antenna mode and the transmission line mode. Under the usual assumptions of conventional transmission line theory these modes do approximately decouple within a cavity. As a result, cavity properties will primarily influence the antenna mode but not the transmission line mode.

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