Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 18 Jan 2018 My Price 9.00

transmission line

A certain transmission line is constructed from two thin metal "ribbons," of width w, a very small distance h « w apart. The current travels down one strip and back along the other. In each case, it spreads out uniformly over the surface of the ribbon.

(a) Find the capacitance per unit length, C.

(b) Find the inductance per unit length, L.

(c) What is the product LC, numerically?[L and C will, of course, vary from one kind of transmission line to another, but their product is a universal constant check, for example, the cable in Ex. 7.13-provided the space between the conductors is a vacuum. In the theory of transmission lines, this product is related to the speed with which a pulse propagates down the line: v = 1/]

(d) If the strips are insulated from one another by a non-conducting material of permittivity ϵ and permeability JL, what then is the product LC? What is the propagation speed?

Example 7.13

A long coaxial cable carries current I (the current flows down the surface of the inner cylinder, radius a, and back along the outer cylinder, radius b) as shown in Fig. 7 .40. Find the magnetic energy stored in a section of length l.

 

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Maurice Tutor
(5)
Status NEW Posted 18 Jan 2018 07:01 PM My Price 9.00

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