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ERIC Number: EJ905538
Record Type: Journal
Publication Date: 2010-Nov
Pages: 6
Abstractor: As Provided
Reference Count: 10
ISSN: ISSN-0018-9359
Some Little-Known Facts about Transmission Lines and Some New Results
Dutta Roy, Suhash C.
IEEE Transactions on Education, v53 n4 p556-561 Nov 2010
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 ([Gamma][subscript L]) 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 [Gamma][subscript L] depends on whether the load or the characteristic impedance is variable and whether the load is active or passive. (Contains 1 figure.)
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A