00000EC303121902

polarization, travelling from one medium to another at oblique incidence.
b) Explain wave polarization and different polarisation with example. (7)
5 a) A transmission line of length 0.2 2 and characteristic impedance 10062 is (8)
terminated with a load impedance of 50+200j . Find input impedance, reflection

coefficient at load end, reflection coefficient at the input end and VSWR.

b) Explain lossless transmission line and distortion less transmission line (7)

6 a) Derive the expression for Brewster angle for parallel polarised wave. (7)

b) Derive the expression for propagation constant of transmission line. (8)
PART C

Answer any two full questions, each carries 20 marks.
7 a) Derive the expression for r circles and x circles in Smith chart. (8)

b) A 25 1100 Q load is connected to a 5042 lossless transmission line. Using smith (8)
chart, find
i. Reflection coefficient at load
1. VSWR
iii. Load admittance
iv. Input impedance at 0.2 ۸ from the load
v. Reflection coefficient at 0.2 from the load
c) Briefly explain importance of quarter wave transformer. (4)
8 a) Explain the propagation of electromagnetic wave in a rectangular waveguide (10)
b) For 1851 mode of propagation in a rectangular wave guide, with length 8cm and_ (10)
6 cm respectively , find the following when frequency of operation is 6 GHz .
i. Cut off frequency
ii. Cut off wavelength
11. | Guide wavelength
iv. Phase constant
v. = Phase velocity
vi. Group velocity
vii. | Wave impedance
9 a) Derive the expression all the Electric and magnetic field components for (10)
Transverse Magnetic Modes.

b) Explain single stub tuning method using Analytical method. (10)