Paper Info
Title
Some Little-Known Facts About Transmission Lines and Some New Results
Abstract
The study of transmission lines forms an integral part of any curriculum in electrical engineering. This paper presents some little-known but interesting facts about transmission lines, which are generally not found in textbooks, along with some new facts, which arose as extensions of these little-known ones. The facts highlighted in this paper are that: 1) the real part of the characteristic impedance is always greater than the magnitude of its imaginary part; 2) the real and imaginary parts of the characteristic impedance and the propagation constant are interrelated by four inequalities; 3) the magnitude of the load reflection coefficient may exceed unity, even for a passive load; 4) the concepts of incident power and reflected power, as usually employed in dealing with lossless lines, are not, in general, valid in a lossy line; 5) the law of power conservation is not violated because of Fact 3; and that 6) the maximum value of depends on whether the load or the characteristic impedance is variable and whether the load is active or passive.
Year
DOI
Venue
2010
10.1109/TE.2009.2033040
Education, IEEE Transactions
Keywords
DocType
Volume
electrical engineering education,power transmission lines,characteristic impedance,electrical engineering curriculum,inequality,passive load,power conservation,propagation constant,transmission lines,Load reflection coefficient,power conservation,transmission lines
Journal
53
Issue
ISSN
Citations 
4
0018-9359
1
PageRank 
References 
Authors
0.40
0
1
Name
Order
Citations
PageRank
Roy, S.C.D.121.03