Important RGPV Question
EC-503(A), Communication Network & Transmission Lines
V Sem, EC
UNIT 1
Q.1 Explain the design of asymmetrical attenuators. Also discuss their working principle. ( RGPV Nov 2023 )
Q.2 A symmetric T-section has impedance of j300Ω in each series arm and impedance of j80Ω in each shunt arm. Find characteristic impedance. ( RGPV Nov 2023 )
Q.3 Define parameters of a 2-port symmetrical network and derive mathematical expression for the same. ( RGPV Nov 2022 )
Q.4 A symmetrical 2-port T-network has elements (10+j2) ohms in the series arms, and (10+j5) ohms in the shunt arm. Find its characteristic impedance. ( RGPV Nov 2022 )
Q.5 Define parameters of a 2-port asymmetrical network and derive mathematical expression for image impedance.
Q.6 An asymmetrical 2-port T-network consists of Z1 = 2+j3 ohms, Z2 = 2+j10 ohms and Z3 = 30 ohms,, Where impedance 2, constitutes the shunt arm of the network. Calculate the image impedances for this network. ( RGPV Nov 2022 )
Q.7 What is Attenuator? Explain. And derive design equations for a 2-port T-attenuator.
( RGPV Nov 2022 )
Q.8 Discuss double stub matching technique in brief. ( RGPV Nov 2022 )
Q.9 Asymmetric T-section has impedance of j300Ω in each series arm and impedance of j80Ω in each Shunt arm. Find characteristic impedance. ( RGPV Dec 2020 )
Q.10 What is meant by insertion loss? Explain with diagram. ( RGPV Dec 2020 )
Q.11 What is matching network? Explain bridged T-network. ( RGPV Dec 2020 )
Q.12 Define the terms
i) Attenuation and phase equalizer
ii) Reflection co-efficient
( RGPV Dec 2020 )
UNIT 2
Q.1 What is the function of m-derived section in a composite filter? ( RGPV Nov 2023 )
Q.2 Design a high pass filter and analyze the performance. ( RGPV Nov 2023 )
Q.3 What are m-derived filters? Explain. Describe their applications in brief.
( RGPV Nov 2022 )
Q.4 A band pass filter has lower cut-off frequency f, and upper cut-off frequency f2. Find its resonance frequency. ( RGPV Nov 2022 )
Q.5 What are the limitations of constant-K. filters? Explain How these can be resolved? ( RGPV Nov 2022 )
Q.6 Design an m-derived filter (T-section) with the following specifications:
Cut-off frequency f 1000 Hz, frequency of infinite attenuation fin = 1250 Hz, Nominal resistance R = 50 ohms.
( RGPV Nov 2022 )
Q.7 An asymmetrical 2-port T-network consists of Z1 = 10+j40 ohms, Z2 = 5+j2 ohms and Z3 = 20 ohms, Where Z3 is the shunt arm element. Find image impedances for this network. ( RGPV Nov 2022 )
Q.8 Realize the nerwork function
F(s) ={(s2+1)(s²+9)}/{(s²+4)(s²+16)}.
( RGPV Nov 2022 )
Q.9 Discuss various kinds of filter design (approximation) techniques in brief. ( RGPV Nov 2022 )
Q.10 Give reactance curves for LPF and HPF filters (L-C). Indicate all bands and cut-off points clearly. ( RGPV Nov 2022 )
Q.11 Design a-m-derived filter. ( RGPV Dec 2020 )
Q.12 Explain Butter worth approximation for low pass filter. ( RGPV Dec 2020 )
Q.12 Explain Chebyshev approximation for high pass filter. ( RGPV Dec 2020 )
UNIT 3
Q.1 Write an operating principle of Bott Duffin method. Explain the concept of minimum positive real function. ( RGPV Nov 2023 )
Q.2 Discuss the Foster and Causer Network. Explain the Brune’s method and synthesis coefficient.
( RGPV Nov 2023 )
Q.3 What are the necessary condition for a function to be realized? Explain. ( RGPV Nov 2022 )
Q.4 Consider a network function F(s) =((s+6)}/{(s+4)(s+8)} [{K1/(s+4)}+{K2/(s+8)}]. Find the values of constants K1 and K2 and realize this network function. ( RGPV Nov 2022 )
Q.5 Realize the network function F(s)= [{(s+2)(s+6)}/{(s+3)(s+9)}]. ( RGPV Nov 2022 )
Q.6 Describe the Cauer-I and Cauer-II forms of the networks with the suitable examples. ( RGPV Nov 2022 )
Q.7 Synthesize in cauer form s³+4s²+2s+1 / s3+s2+s ( RGPV Dec 2020 )
Q.8 Test whether the function is Hurwitz F(s)= s5+s4+2s3+2s² + 2s+1 ( RGPV Dec 2020 )
Q.9 Realize the z(s)=- 3s²+s+6 / 2s3+s2+s+4 in foster- I form. ( RGPV Dec 2020 )
UNIT 4
Q.1 Derive expression for voltage and current at any point on the transmission line in terms of characteristic impedance and length.
( RGPV Nov 2023 )
Q.2 Derive design equations for full series equalizers. ( RGPV Nov 2023 )
Q.3 What is matching network? Explain bridged T-network. ( RGPV Nov 2023 )
Q.4 A cable has an attenuation of 3.5 dB/km and a phase constant of 0.28 radians/km. If 3 volts are applied to the sending end, what will be the voltage at point 10 km down the line when the line is terminated in its characteristic impedance? ( RGPV Nov 2023 )
Q.5 Explain the reflection coefficient of different transmission lines. Explain briefly about open circuit and short circuit line. ( RGPV Nov 2023 )
Q.6 Discuss characteristics preparation co-efficient and Image transfer co-efficient. ( RGPV Nov 2023 )
Q.7 Describe characteristics of an infinite line and matched line. And discuss the phenomenon of power reflection on line in brief. ( RGPV Nov 2022 )
Q.8 The measurements taken on a line are as follows: Open circuit impedance Z-1600 ohms Short circuit impedance Z-400 ohms. Find its primary and secondary coefficients. ( RGPV Nov 2022 )
Q.9 What are the important properties and applications of a short circuited lines and open circuited lines? Explain in detail. ( RGPV Nov 2022 )
Q.10 Describe major applications of the Smith’s chart. ( RGPV Nov 2022 )
Q.11 What are the various kinds of distortions occurring on a line? Derive conditions for a line to be distortion less. ( RGPV Nov 2022 )
Q.12 A transmission line is characterised by R=8.2 ohms per km and G-15 micro-Mhos per km. Calculate it’s primary and secondary constant. ( RGPV Nov 2022 )
Q.13 Describe the characteristics of composite filters (L-C) in brief. ( RGPV Nov 2022 )
Q.14 Derive design equations for a low pass m-derived filter. ( RGPV Nov 2022 )
Q.15 Derive expression for voltage and current at any point on the transmission line in terms of characteristic impedance and length. ( RGPV Dec 2020 )
Q.16 Draw the lumped parameter equivalent of transmission line and explain briefly. ( RGPV Dec 2020 )
UNIT 5
Q.1 A generator of IV, 1 kHz supplies power to a 100 km long line terminated in Z, and having the following constants, L=0.00367 H/km R = 10.4 Ω/km, G=0.8×10-6 mho/km, C=0.00835×10-6 F/km Calculate Zo, attenuation constant, phase constant, wavelength and velocity, received current, voltage and power.
( RGPV Nov 2023 )
Q.2 Explain double stub impedance matching and its advantage over single stub.
( RGPV Nov 2023 )
Q.3 Write a short note on any two:
i) Lattice and Bridged T networks
ii) Frequency transformation
iii) Conditions for real function
iv) Introduction to micro-strip lines
( RGPV Nov 2023 )
Q.4 Describe characteristics of a quarter wave line. Find input impedance of a quarter wave line with characteristic impedance ZO = 100 ohms and load resistance of R₁= 4 ohms. ( RGPV Nov 2022 )
Q.5 Derive transmission line equations. ( RGPV Nov 2022 )
Q.6 Define the terms namely reflection factor (constant) and VSWR. A line (with characteristic Impedance ZO = 50 ohms) is terminated in ZL = 100 ohms. Find reflection factor (constant) and VSWR for this 2-wire line. ( RGPV Nov 2022 )
Q.7 Give description of line parameters in brief. ( RGPV Nov 2022 )
Q.8 Discuss the single stub matching technique in brief. ( RGPV Nov 2022 )
Q.9 Explain any one method of power measurement on the line. ( RGPV Dec 2020 )
Q.10 Explain double stub impedance matching and its advantage over single stub. ( RGPV Dec 2020 )
Q.11 Write short notes on the following-
a) Half wave line
b) Micro strip Line
c) Foster network
d) Distortion less line
( RGPV Dec 2020 )
— Best of Luck for Exam —
