B B5802 Pages: 2

b) The electric field amplitude of a uniform plane wave propagating in the a, (6) direction is 250V/m.
If EO 8 ax, 80401101530/8 . Find:

i) Frequency ii) Wavelength 111)
period iv) The amplitude of H

6 a) Derive the equation for transmission and reflection coefficients of an (7) electromagnetic
wave incident normally on the boundary between two different regions.

(b) A wave propagating in a medium has components 13 ப 500cos 10) 7t00za)xV/m (8)

and H O1.1cos(10’t 007 a) A/m. If the wave is travelling at a velocity,
y
vO 0509/1070 ‘c’ denote velocity of EM wave in free space. Find:
DU, WO, 111) iv wo
PARTC
Answer any two full questions, each carries 20 marks

7 a) With a neat diagram explain the propagation of electromagnetic wave in a (8) rectangular wave
guide?
b) Derive the equation for electric and magnetic field intensities for TE mode of
(10) propagation.
c) Obtain the cut off frequency for propagation in a rectangular wave guide. (2)
8 a) What is characteristic impedance of a transmission line? derive the equation for (8)
characteristic impedance of a lossless transmission line.
b) Write short notes on single stub matching and double stub matching. (8)
c) How a smith chart is useful in finding the stub length for impedance matching
(4)
9 a) Derive the equation for characteristic impedance, phase velocity, propagation (12) constant of
a transmission line.
b) At a frequency of 80 MHz, a lossless transmission line has a characteristic (8)
impedance of 300Q and a wavelength of 2.5m. 120:
i) L
ii) त
iii) If the line is terminated with a parallel combination of 200Q and 597, determine
the reflection co-efficient and the standing wave ratio. ****

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