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anna university tlw question paper 
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Re: anna university tlw question paper
As you want here I am providing Anna University TLW (Transmission Lines and Wave) Question Paper, so on your demand I am providing same here : B.E / B.TECH. DEGREE EXAMINATION (Regulation 2004) EC 1305TRANSMISSION LINES AND WAVEGUIDES PART A[10 x 2 = 20] – Two mark Questions for TLW 1.What is propagation constant ? Which are its two components? 2.State the condition for distortionless line. 3.If the reflection coefficient of a line is 0.3 ?_?66?^° ¦ ,calculate the standing wave ratio. 4.What is the value of Z_° for the dissipationless line? 5.What are the characteristics of TEM wave? 6.Write Maxwell’s equations in point form. 7.A rectangular waveguide with dimensions a=8.5cm and b=4.3cm .Determine the cutoff frequency for ?TM?_10 mode of propagation. 8.What is meant by dominant mode of the wave? 9.What is meant by cavity resonator? 10.What is the dominant mode in circular waveguide ? Why ? PART B ( 16 Mark Questions for TLW ) 11 . (a)(i) Derive the expression for voltage and current at any point on a transmission line in terms of receiving end voltage and current.[Marks 10] 11.(a)(ii) A line has the following primary constants R=100 ?/km L=0.001 H/km G=1.5 µv/km C=0.062 µF/km. Find the characteristic impedance and the propagation constant .[Marks 6] (or) 11(b)(i) Derive Campbell’s equation.[Marks 8] 11.(b)(ii) A generator of 1V,1kHz supplies power to a 100km transmission line terminated in 200 ? resistance. The line parameters are R=10?/km, L=3.8 mH/km, G=1µv/km, C=0.0085 µF/km Calculate the input impedance and reflection coefficient.[Marks 8] 12(a)(i)Define standing wave ratio and obtain the expression of VSWR in terms of reflection coefficient.[Marks 8] 12.(a)(ii) Derive the input impedance of a quarter wave line and discuss its applications.[Marks 8] (or) 12.(b)(i) Obtain the length and the location of a short circuited stub for impedance matching on a transmission line.[Marks 10] 12.(b)(ii) A load (50j100)? is connected to a 50? line. Design a short circuited stub to provide matching between the two at signal frequency of 30Mhz using Smith Chart.[Marks 6] 13.(a)(i) Obtain the solution of field components of a TE wave between parallel plate , propagating in Z direction.[Marks 10] 13.(a)(ii)A pair of perfectly conducting planes are separated by 3.6cm in air. For ?TM?_10 mode determine the cutoff frequency and cutoff wavelength, if the operating frequency is 5Ghz.[Marks 6] (or) 13.(b)(i) Derive the expressions for the field components of TEM waves between parallel conducting planes. Discuss the properties of TEM waves.[Marks 10] 13.(b)(ii)For a frequency of 10 GHz and plane separation of 5cm in air, find the cutoff wavelength, phase velocity and group velocity of the wave.[Marks 6] 14(a) Deduce the expressions for the field components of TM waves guided along rectangular waveguide. [Marks 16] (or) b ) ( i )Derive the expression of wave impedance for TE and TM waves guided along rectangular waveguide.[Marks 8] (b)(ii) A ?TE?_10 mode is propagated through a waveguide with a=10cm at a frequency of 2.5Ghz.Find the cutoff wavelength, phase velocity, group velocity and wave impedance.[Marks 8] 15.(a)(i) Derive the expressions for the field components of TE waves guided along circular waveguide.[Marks 10] (a)(ii) A circular waveguide has an internal diameter of 6cm.For a 9GHz signal propagated in the ?TE?_11mode,calculate the cutoff frequency and the characteristic impedance [?(ha)?_11^1=1.84].[Marks 6] (or) (b)(i)Obtain the expression for the resonant frequency of a rectangular cavity resonator.[Marks 8] (b)(ii) Calculate the lowest resonant frequency of a rectangular cavity resonator of dimension a=2cm, b=1cm and d=3cm.[Marks 8] 
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