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## Marks 1

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The voltage of an electromagnetic wave propagating in a coaxial cable with uniform characteristic impedance is $$V(l) =... GATE ECE 2017 Set 1 A two wire transmission line terminates in a television set. The VSWR measured on the line is 5.8. The percentage of pow... GATE ECE 2017 Set 2 The propagation constant of a lossy transmission line is (2 + j5)$${m^{ - 1}}$$and its characteristic impedance is (50... GATE ECE 2016 Set 1 A coaxial cable is made of two brass conductors. The spacing between the conductors is filled with Teflon$$\left( {{\va...
GATE ECE 2015 Set 3
In the following figure, the transmitter Tx sends a wideband modulated RF signal via a coaxial cable to the receiver Rx....
GATE ECE 2014 Set 3
To maximize power transfer, a lossless transmission line is to be matched to a resistive load impedance via a $$\lambda ... GATE ECE 2014 Set 2 The return loss of a device is found to be 20 dB. The voltage standing wave ratio (VSWR) and magnitude of reflection coe... GATE ECE 2013 A coaxial cable with an inner diameter of 1 mm and outer diameter of 2.4 mm is filled with a dielectric of relative perm... GATE ECE 2012 A transmission line of characteristic impedance 50$$\Omega $$is terminated by a 50$$\Omega $$load. When excited by a... GATE ECE 2011 If the scattering matrix [S] of a two port network is$$\$\left[ S \right] = \left[ {\matrix{ {0.2\,\angle \,\,{0^ \ci...
GATE ECE 2010
A transmission line has a characteristic impedance of 50 $$\Omega$$ and a resistance of 0.1 $$\Omega$$/m. If the line ...
GATE ECE 2010
Many circles are drawn in a Smith chart used for transmission line calculations. The circles shown in Fig. represent ...
GATE ECE 2005
In an impedance Smith chart, a clockwise movement along a constant resistance circle gives rise to
GATE ECE 2002
The VSWR can have any value between
GATE ECE 2002
A transmission line is distortionless if
GATE ECE 2001
The magnitudes of the open-circuit and short-circuit input impedances of a transmission line are 100$$\Omega \,$$ and 25...
GATE ECE 2000
Assuming perfect conductors of a transmission line, pure TEM propagation is NOT possible in
GATE ECE 1999
All transmission line sections shown in Fig. have characteristic impedance $${R_0}\, + \,j0$$. The input impedance $${Z_... GATE ECE 1998 A transmission line of 50$$\Omega $$characteristic impedance is terminated with a 100$$\Omega $$resistance. The minim... GATE ECE 1997 The capacitance per unit length and the characteristic impedance of a lossless transmission line are C and$$Z_0$$respe... GATE ECE 1996 A lossless transmission line having 50$$\Omega $$characteristic impedance and lenght$$\lambda /4$$is short ciruited ... GATE ECE 1996 A load impedance (200 + j0)$$\Omega $$is to be matched to a 50$$\Omega $$lossless transmission line by using a quarte... GATE ECE 1994 ## Marks 2 More A lossless microstrip transmission line consists of a trace of width w. It is drawn over a practically infinite ground p... GATE ECE 2016 Set 2 A microwave circuit consisting of lossless transmission lines$$T_1$$and$$T_2$$is shown in the figure. The plot shows... GATE ECE 2016 Set 2 A 200 m long transmission line having parameters shown in the figure is terminated into a load ܴ$$R_L$$. The line is con... GATE ECE 2015 Set 3 Consider the 3 m long lossless air-filled transmission line shown in the figure. It has a characteristic impedance of$$...
GATE ECE 2015 Set 3
In the transmission line shown, the impedance $${Z_{in}}$$ (in ohms) between node A and the ground is ...
GATE ECE 2014 Set 2
For a parallel plate transmission line, let v be the speed of propagation and Z be the characteristic impedance. Neglect...
GATE ECE 2014 Set 1
A transmission line with a characteristic impedance of 100 $$\Omega$$ is used to match a 50 $$\Omega$$ section to a 20...
GATE ECE 2012
A transmission line of characteristic impedance 50 $$\Omega$$ is terminated in a load impedance $$Z_L$$. The VSWR of t...
GATE ECE 2011
In the circuit shown, all the transmission line sections are lossless. The Voltage Standing Wave Ration (VSWR) on the 60...
GATE ECE 2010
A transmission line terminates in two branches, each of length $$\lambda /4$$, as shown.The branches are terminated by 5...
GATE ECE 2009
One end of loss-less transmission line having the characteristic impedance of 75 $$\Omega$$ and length of 1 cm is short...
GATE ECE 2008
The parallel branches of a 2-wire transmission line are terminated in 100 $$\Omega$$ and 200 $$\Omega$$ resistors as s...
GATE ECE 2007
A load of 50 $$\Omega$$ is connected in shunt in a 2-wire transmission line of $$Z_0$$ = 50 $$\Omega$$ as shown in the...
GATE ECE 2007
Voltage standing wave pattern in a lossless transmission line with characteristic impedance 50 $$\Omega$$ and a resisti...
GATE ECE 2005
Characteristic impedance of a transmission line is 50$$\Omega$$. Input impedance of the open-circuited line is $${Z_{oc... GATE ECE 2005 Voltage standing wave pattern in a lossless transmission line with characteristic impedance 50$$\Omega $$and a resisti... GATE ECE 2005 A lossless transmission line is terminated in a load which reflects a part of the incident power. The measured VSWR is 2... GATE ECE 2004 Consider an impedance Z = R + jX marked with point P in an impedance Smith chart as shown in Fig. The movement from poin... GATE ECE 2004 Consider a 300$$\Omega $$, quarter-wave long (at 1 GHz) transmission line as shown in Fig. It is connected to a 10V, 50... GATE ECE 2004 A short-circuited stub is shunt connected to a transmission line as shown in Fig. If$${Z_0} = 50\,\,\Omega $$, the admi... GATE ECE 2003 In air, a lossless transmission line of length 50 cm with$$L = 10\,\mu H/m,\,\,C = 40\,\,pF/m$$is operated at 25 MHz.... GATE ECE 1999 In a twin-wire transmission line in air, the adjacent voltage maxima are at 12.5 cm and 27.5. The operating frequency is... GATE ECE 1999 If a pure resistance load, when connected to a lossless 75-ohm line, produces a VSWR of 3 on the line, then the load imp... GATE ECE 1994 Consider a transmission line of characteristic impedance 50 ohm. Let it be terminated at one end by ( + j50) ohm. The VS... GATE ECE 1993 A transmission line whose characteristic impedance is a pure resistance GATE ECE 1992 The input impedance of a short-circuited lossless transmission line guarter wave long is GATE ECE 1991 A 50 ohm lossless transmission line has a pure reactance of (j100) ohms as its load. The VSWR in the line is : GATE ECE 1989 A two - wire transmission line of characteristic impedance$$Z_0$$is connected to a load of impedance$${Z_L}({Z_L}\, \...
GATE ECE 1988
A transmission line of pure resistive characteristic impedance is terminated with an unknown load. The measured value of...
GATE ECE 1987

## Marks 5

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The three regions shown in Fig. are all lossless and non-magnetic. Find (a) Wave impedance in mediums 2 and 3. (b) d ...
GATE ECE 2000
A $${\lambda \over 2}$$ section of a 600 $$\Omega$$ transmission line, short ciruited at one end and open circuited at...
GATE ECE 1997

## Marks 10

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A 200 volt (r. m. s) generator having an internal resistance of 200 ohm is feeding a loss-less transmission line. The ch...
GATE ECE 1990

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