Q4. (a) The complex propagation coefficient for a transmission line y is given by: Y = √(R' + jwL')(G' + jwC') For a tra

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Q4 A The Complex Propagation Coefficient For A Transmission Line Y Is Given By Y R Jwl G Jwc For A Tra 1 (70.37 KiB) Viewed 24 times

Q4. (a) The complex propagation coefficient for a transmission line y is given by: Y = √(R' + jwL')(G' + jwC') For a travelling wave propagating along a transmission line what do the real and imaginary parts of y represent and what are their associated units? 2 marks (b) The voltage and current waves travelling along a lossless line are defined as: V(z) =Ve-vx+Ve+yz I(z) = le-Y²+e+rz How does the characteristic impedance Zo of the line relate to the voltage and current traveling waves? 2 marks (c) A voltage pulse with a duration of 5 ns and an amplitude of 10 V takes 600 ns to propagate along a 100 m lossless transmission line with a characteristic impedance of 1000. What is the relative permittivity of the insulation between the conductors of the transmission line? 2 marks (d) Use the template shown in Figure Q4d to draw a PI diagram indicating how a laser power output P depends on a bias current /. 2 marks (e) If a plane wave in air is described as E = Eo cos (@t-kz), in what direction is the wave traveling? 2 marks Figure Q4d