Microwave Engineering Mcq Set 1 | Engineering - Online Exam Test Papers | Engineering - MCQs[multiple choice questions and answers ] | Engineering - Mock Test Papers | Engineering - Practice Papers

Question:

 A microstrip patch antenna has a width of 5.08mm and surface resistivity of 1.84*10-2. Then the attenuation due to conductor loss is:

1.0.0724

2.0.034

3.0.054

4.None of the mentioned

Question:

 A rectangular cavity supports:

1.TEM mode of resonance

2.TM mode of resonance

3.TE mode of resonance

4.TE, TM modes of resonance

Question:

 Attenuation constant α signifies:

1. real part of propagation constant

2.loss that the transmission line causes

3.none of the mentioned

4.All of the mentioned

Question:

 Characteristic impedance of a transmission line is:

1.impedance Z of a transmission line

2.impedance which is a constant at any point on the transmission line

3. reciprocal of admittance of a transmission line

4.none of the mentioned

Question:

 Characteristic impedance Zₒ is given by:

1.√Z/Y

2.√ZY

3.√Z+√Y

4.√Z-√Y

Question:

 Even mode characteristic impedance of a Lange coupler:

1. (Vp.Cep)-1

2.Vp.Cep

3.(Vp.Lep)-1

4.Vp.Lep

Question:

 Find the wave number of a rectangular cavity resonator filled with a dielectric of 2.25 and designed to operate at a frequency of 5 GHz.

1.157.08

2.145.2

3.345.1

4.415.08

Question:

 For a 4 wire Lange coupler, if the odd mode and even mode capacitances are 12pF and 9pF respectively, then the equivalent capacitance in terms of two wired coupled line in even mode is:

1. 15.1 pF

2.16.7 pF

3.12 pF

4.9 pF

Question:

 For an equal-split Wilkinson power divider of 50Ω system impedance, the characteristic impedance of quarter wave transmission line used is:

1.70.7 Ω

2.50 Ω

3.100 Ω

4.None of the mentioned

Question:

 For even mode excitation of a Lange coupler, all the four lines of the Lange coupler are at:

1. equal potential

2.zero potential

3.unequal potential

4.negative potential

Question:

 If a device is passive and contains no anisotropic elements, then the device is_______ network.

1.Reciprocal

2.Non reciprocal

3.Lossless

4.Lossy

Question:

 If the attenuation due to dielectric loss and attenuation due to conductor loss in a microstrip transmission line is 0.024Np/m and 0.0724 Np/m, then the unloaded quality factor if the propagation constant is 151 is:

1.1502

2.783

3.587

4.234

Question:

 If the coupling coefficient of a coupled line coupler is 0.1 and the characteristic impedance of the material is 50 Ω, then the odd mode characteristic impedance is:

1.45.23 Ω

2.50 Ω

3.38 Ω

4.None of the mentioned

Question:

 If the input power is divided in the ratio of 2:1 in a T- junction coupler and the characteristic impedance of the 2 output lines is 150Ω and 75Ω, then the impedance of the input line is:

1.100Ω

2. 50Ω

3.150Ω

4.None of the mentioned

Question:

 If unloaded Q due to conductor loss and unloaded Q due to dielectric loss is 29390 and 2500 respectively, then the total unloaded Q of the circular cavity is:

1.2500

2.29390

3.2300

4.31890

Question:

 Isolation of a directional coupler is a measure of the:

1. Power delivered to the uncoupled port

2.Power delivered to the coupled port

3.Power delivered to the second port

4.None of the mentioned

Question:

 Propagation constant γ in terms of admittance and impedance of the transmission line is:

1.√Z/Y

2.√ZY

3.ZY

4.ZY*

Question:

 Propagation constant γ is a :

1. real value

2.none of the mentioned

3. imaginary value

4.complex value

Question:

 Riblet-short slot coupler allows only:

1.TE10 mode of propagation

2.TE20 mode of propagation

3.Both a and b

4.None of the mentioned

Question:

 The loss tangent for a circular cavity resonator is 0.0004.Then the unloaded Q due to dielectric loss is:

1.1350

2.1560

3.560

4.2500

Question:

 The mode of propagation of propagation supported by coupled line couplers is:

1.TM mode

2.TE mode

3.TEM mode

4.quasi TEM mode

Question:

 The output power measured at the 2 ports of the T junction:

1.Is a constant

2.Variable

3.Is not real power

4.None of the mentioned

Question:

. If a dielectric resonator has a dielectric constant of 49, then the reflection coefficient of the dielectric resonator is:

1.0.5

2.0.75

3.0.1

4.0.7

Question:

18000 ring hybrid with system impedance of 50 Ω has to be designed. Then the characteristic impedance of the arms of the 1800 hybrid is:

1.50 Ω

2.70.70 Ω

3.100 Ω

4.None of the mentioned

Question:

A 50 Ω branch-line Quadrature hybrid has to be designed to operate over a range of frequencies. The branch-line impedance of this coupler so designed is:

1.70.7 Ω

2.35.4 Ω

3.50 Ω

4.100 Ω

Question:

A circular cavity resonator has a wave number of 151, radius of 2.74 cm, and surface resistance of 0.0184Ω. If the cavity is filled with a dielectric of 2.01, then unloaded Q due to conductor loss is:

1.25490

2.21460

3.29390

4.none of the mentioned

Question:

A circular cavity resonator is filled with a dielectric of 2.08 and is operating at 5GHz of frequency. Then the wave number is:

1.181

2.151

3.161

4.216

Question:

A coaxial cable is air filled with air as dielectric with inner and outer radius equal to 1 mm and 4 mm. If the surface resistivity is 1.84*10-2Ω,then the attenuation due to conductor loss is:

1.0.011

2.0.022

3.0.11

4.0.22

Question:

A cylindrical cavity resonator can be constructed using a circular waveguide.

1.shorted at both the ends

2.open at both the ends

3.matched at both the ends

4.none of the mentioned

Question:

A major disadvantage of Lange coupler is:

1.high power loss

2.complex construction

3.low gain

4.None of the mentioned

Question:

A major disadvantage of the lossless T-junction power divider is:

1. Not matched at all the ports

2.Low power output

3.Complex construction

4.None of the mentioned

Question:

Coupled line couplers are:

1.symmetric couplers

2.asymmetric couplers

3.in phase couplers

4.type of hybrid coupler

Question:

Example of a non reciprocal device:

1.Branch line coupler

2. Wilkinson coupler

3.Magic-T hybrid

4.Circulator

Question:

For a 4 wire Lange coupler, if the odd mode and even mode capacitances are 12pF and 9pF respectively, then the equivalent capacitance in terms of two wired coupled line in odd mode is:

1.18.56 pF

2.25.71 pF

3.42 pF

4. 31.6 pF

Question:

For coupled line coupler, if the voltage coupling factor is 0.1 and the characteristic impedance of the microstrip line is 50 Ω, even mode characteristic impedance is:

1.50.23 Ω

2.55.28 Ω

3.100 Ω

4.80.8 Ω

Question:

Given that the wave number of a circular cavity resonator is 151 (TE011 mode), and the length of the cavity is twice the radius of the cavity, the radius of the circular cavity operating at 5GHz frequency is:

1.2.1 cm

2.1.7 cm

3.2.84 cm

4.insufficient data

Question:

If 10 watt is applied to the input port of a standard Wilkinson divider, then the sum of the power measured at the two output ports of the Wilkinson coupler is

1.5 watt

2.10 watt

3.7.07 watt

4.8 watt

Question:

If a microwave network is lossless, then S matrix of the microwave network is:

1.Unitary

2.Symmetric

3.Identity matrix

4.Zero matrix

Question:

If the loss tangent of a rectangular waveguide is 0.0004, then Q due to dielectric loss is:

1.1250

2.2450

3.2500

4.1800

Question:

In order to obtain the resonant frequency of a rectangular waveguide, the closed cavity has to satisfy:

1.Gaussian equation

2.Helmholtz equation

3.Ampere’s law

4.None of the mentioned

Question:

Power dividers and couplers are ______ microwave components used for power division or power combining.

1.Passive

2.Active

3.Linear

4.Non linear

Question:

Propagation constant γ is given by:

1.α+jβ

2.α-jβ

3.α/jβ

4.α.jβ

Question:

Quadrature hybrids are those couplers which are:

1.3 dB couplers

2.Directional couplers

3.They have a 900 phase difference between signals in through and coupled arms.

4.All of the mentioned

Question:

Scattering matrix of a reciprocal network is:

1.Symmetric

2.Asymmetric

3.Identity matrix

4.Null matrix

Question:

Schwinger reversed phase coupler is a waveguide coupler designed so that the path lengths for the two coupling apertures are the same for_________

1.Coupled port

2.Uncoupled port

3.Back port

4.Isolated port

Question:

Short circuited λ/2 transmission line has a quality factor of:

1.β/2α

2.2β/α

3.β/α

4.Z0/ZL

Question:

T- junction is an example for:

1.2 port network

2.3 port network

3.4 port network

4.None of the mentioned

Question:

The analysis of Wilkinson coupler is done using:

1.Even-odd mode analysis

2.Symmetry

3.S matrix approach

4.None of the mentioned

Question:

The capacitance per unit length of broadside parallel lines with width W and separation d is:

1.∈W/d

2.∈d/W

3.dW/∈

4. none of the mentioned

Question:

The in phase combining of power at the coupled port is achieved by means of a _______

1.Matching network

2.A small slot

3.Quarter Wave transformer

4.None of the mentioned

Question:

The in phase combining of power at the coupled port is achieved by means of a _______

1.Matching network

2.A small slot

3.Quarter Wave transformer

4.None of the mentioned

Question:

The key difference between circuit theory and transmission line theory is:

1.circuit elements

2.voltage

3.current

4.electrical size

Question:

The major disadvantage of coupled line coupler is:

1.complex construction

2.low power gain

3.higher loss

4.none of the mentioned

Question:

The major disadvantage of dielectric resonators is:

1.complex construction

2.field fringing

3.requirement of high dielectric constant

4.None of the mentioned

Question:

The mode of the circular cavity resonator used in frequency meters is:

1.TE011 mode

2.TE101 mode

3.TE111 mode

4.TM111 mode

Question:

The propagation constant of TEmn mode of propagation for a cylindrical cavity resonator is:

1.√ (k2-(pnm/a)2)

2.√ pnm/a

3.√ (k2+(pnm/a)2)

4.None of the mentioned

Question:

The required length of the cavity resonator for l=1 mode (m=1, n=0) given that the wave number of the cavity resonator is 157.01 and the broader dimension of the waveguide is 4.755 cm:

1.1.10 cm

2.2.20 cm

3.2.8 cm

4.1.8 cm

Question:

The S matrix of a Quadrature hybrid is of size 4×4 and the diagonal elements of a matched coupler are all:

1.1

2.0

3.Cannot be determined

4. None of the mentioned

Question:

The Wilkinson power divider is a:

1.2 port network

2.3 port network

3.4 port network

4.None of the mentioned

Question:

To model a transmission line of infinitesimal length Δz, the lumped element that is not used is:

1.resistor

2.inductor

3.capacitor

4.transistor

Question:

Transmission line is a _________ parameter network.

1.lumped

2.distributed

3.active

4.None of the mentioned

Question:

Unloaded Q of a rectangular waveguide cavity resonator:

1. Does not exist

2.Defined as the ratio of length of the waveguide to breadth of the waveguide c)

3.Defined as the ratio of stored energy to the power dissipated in the walls

4.None of the mentioned

Question:

________ and __________ contribute to the admittance of a transmission line in the lumped element representation.

1.conductance G, capacitor

2.conductance, inductor

3.resistor, capacitor

4.resistor, inductor

Question:

_________ and __________ contribute to the impedance of a transmission line in the lumped element representation.

1.resistor, inductor

2.resistor, capacitor

3.capacitor, inductor

4.transistor, capacitor

Question:

_________ is a key component in the scalar or vector network analyzer.

1.Reflectometer

2.Radiometer

3. Frequency meter

4.None of the mentioned

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Engineering/Microwave Engineering Mcq Set 1 Sample Test,Sample questions

Question: A microstrip patch antenna has a width of 5.08mm and surface resistivity of 1.84*10-2. Then the attenuation due to conductor loss is:

Question: A rectangular cavity supports:

Question: Attenuation constant α signifies:

Question: Characteristic impedance of a transmission line is:

Question: Characteristic impedance Zₒ is given by:

Question: Even mode characteristic impedance of a Lange coupler:

Question: Find the wave number of a rectangular cavity resonator filled with a dielectric of 2.25 and designed to operate at a frequency of 5 GHz.

Question: For a 4 wire Lange coupler, if the odd mode and even mode capacitances are 12pF and 9pF respectively, then the equivalent capacitance in terms of two wired coupled line in even mode is:

Question: For an equal-split Wilkinson power divider of 50Ω system impedance, the characteristic impedance of quarter wave transmission line used is:

Question: For even mode excitation of a Lange coupler, all the four lines of the Lange coupler are at:

Question: If a device is passive and contains no anisotropic elements, then the device is_______ network.

Question: If the attenuation due to dielectric loss and attenuation due to conductor loss in a microstrip transmission line is 0.024Np/m and 0.0724 Np/m, then the unloaded quality factor if the propagation constant is 151 is:

Question: If the coupling coefficient of a coupled line coupler is 0.1 and the characteristic impedance of the material is 50 Ω, then the odd mode characteristic impedance is:

Question: If the input power is divided in the ratio of 2:1 in a T- junction coupler and the characteristic impedance of the 2 output lines is 150Ω and 75Ω, then the impedance of the input line is:

Question: If unloaded Q due to conductor loss and unloaded Q due to dielectric loss is 29390 and 2500 respectively, then the total unloaded Q of the circular cavity is:

Question: Isolation of a directional coupler is a measure of the:

Question: Propagation constant γ in terms of admittance and impedance of the transmission line is:

Question: Propagation constant γ is a :

Question: Riblet-short slot coupler allows only:

Question: The loss tangent for a circular cavity resonator is 0.0004.Then the unloaded Q due to dielectric loss is:

Question: The mode of propagation of propagation supported by coupled line couplers is:

Question: The output power measured at the 2 ports of the T junction:

Question: . If a dielectric resonator has a dielectric constant of 49, then the reflection coefficient of the dielectric resonator is:

Question: 18000 ring hybrid with system impedance of 50 Ω has to be designed. Then the characteristic impedance of the arms of the 1800 hybrid is:

Question: A 50 Ω branch-line Quadrature hybrid has to be designed to operate over a range of frequencies. The branch-line impedance of this coupler so designed is:

Question: A circular cavity resonator has a wave number of 151, radius of 2.74 cm, and surface resistance of 0.0184Ω. If the cavity is filled with a dielectric of 2.01, then unloaded Q due to conductor loss is:

Question: A circular cavity resonator is filled with a dielectric of 2.08 and is operating at 5GHz of frequency. Then the wave number is:

Question: A coaxial cable is air filled with air as dielectric with inner and outer radius equal to 1 mm and 4 mm. If the surface resistivity is 1.84*10-2Ω,then the attenuation due to conductor loss is:

Question: A cylindrical cavity resonator can be constructed using a circular waveguide.

Question: A major disadvantage of Lange coupler is:

Question: A major disadvantage of the lossless T-junction power divider is:

Question: Coupled line couplers are:

Question: Example of a non reciprocal device:

Question: For a 4 wire Lange coupler, if the odd mode and even mode capacitances are 12pF and 9pF respectively, then the equivalent capacitance in terms of two wired coupled line in odd mode is:

Question: For coupled line coupler, if the voltage coupling factor is 0.1 and the characteristic impedance of the microstrip line is 50 Ω, even mode characteristic impedance is:

Question: Given that the wave number of a circular cavity resonator is 151 (TE011 mode), and the length of the cavity is twice the radius of the cavity, the radius of the circular cavity operating at 5GHz frequency is:

Question: If 10 watt is applied to the input port of a standard Wilkinson divider, then the sum of the power measured at the two output ports of the Wilkinson coupler is

Question: If a microwave network is lossless, then S matrix of the microwave network is:

Question: If the loss tangent of a rectangular waveguide is 0.0004, then Q due to dielectric loss is:

Question: In order to obtain the resonant frequency of a rectangular waveguide, the closed cavity has to satisfy:

Question: Power dividers and couplers are ______ microwave components used for power division or power combining.

Question: Propagation constant γ is given by:

Question: Quadrature hybrids are those couplers which are:

Question: Scattering matrix of a reciprocal network is:

Question: Schwinger reversed phase coupler is a waveguide coupler designed so that the path lengths for the two coupling apertures are the same for_________

Question: Short circuited λ/2 transmission line has a quality factor of:

Question: T- junction is an example for:

Question: The analysis of Wilkinson coupler is done using:

Question: The capacitance per unit length of broadside parallel lines with width W and separation d is:

Question: The in phase combining of power at the coupled port is achieved by means of a _______

Question: The in phase combining of power at the coupled port is achieved by means of a _______

Question: The key difference between circuit theory and transmission line theory is:

Question: The major disadvantage of coupled line coupler is:

Question: The major disadvantage of dielectric resonators is:

Question: The mode of the circular cavity resonator used in frequency meters is:

Question: The propagation constant of TEmn mode of propagation for a cylindrical cavity resonator is:

Question: The required length of the cavity resonator for l=1 mode (m=1, n=0) given that the wave number of the cavity resonator is 157.01 and the broader dimension of the waveguide is 4.755 cm:

Question: The S matrix of a Quadrature hybrid is of size 4×4 and the diagonal elements of a matched coupler are all:

Question: The Wilkinson power divider is a:

Question: To model a transmission line of infinitesimal length Δz, the lumped element that is not used is:

Question: Transmission line is a _________ parameter network.

Question: Unloaded Q of a rectangular waveguide cavity resonator:

Question: ________ and __________ contribute to the admittance of a transmission line in the lumped element representation.

Question: _________ and __________ contribute to the impedance of a transmission line in the lumped element representation.

Question: _________ is a key component in the scalar or vector network analyzer.

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R4R Team

Question:
A microstrip patch antenna has a width of 5.08mm and surface resistivity of 1.84*10-2. Then the attenuation due to conductor loss is:

Question:
A rectangular cavity supports:

Question:
Attenuation constant α signifies:

Question:
Characteristic impedance of a transmission line is:

Question:
Characteristic impedance Zₒ is given by:

Question:
Even mode characteristic impedance of a Lange coupler:

Question:
Find the wave number of a rectangular cavity resonator filled with a dielectric of 2.25 and designed to operate at a frequency of 5 GHz.

Question:
For a 4 wire Lange coupler, if the odd mode and even mode capacitances are 12pF and 9pF respectively, then the equivalent capacitance in terms of two wired coupled line in even mode is:

Question:
For an equal-split Wilkinson power divider of 50Ω system impedance, the characteristic impedance of quarter wave transmission line used is:

Question:
For even mode excitation of a Lange coupler, all the four lines of the Lange coupler are at:

Question:
If a device is passive and contains no anisotropic elements, then the device is_______ network.

Question:
If the attenuation due to dielectric loss and attenuation due to conductor loss in a microstrip transmission line is 0.024Np/m and 0.0724 Np/m, then the unloaded quality factor if the propagation constant is 151 is:

Question:
If the coupling coefficient of a coupled line coupler is 0.1 and the characteristic impedance of the material is 50 Ω, then the odd mode characteristic impedance is:

Question:
If the input power is divided in the ratio of 2:1 in a T- junction coupler and the characteristic impedance of the 2 output lines is 150Ω and 75Ω, then the impedance of the input line is:

Question:
If unloaded Q due to conductor loss and unloaded Q due to dielectric loss is 29390 and 2500 respectively, then the total unloaded Q of the circular cavity is:

Question:
Isolation of a directional coupler is a measure of the:

Question:
Propagation constant γ in terms of admittance and impedance of the transmission line is:

Question:
Propagation constant γ is a :

Question:
Riblet-short slot coupler allows only:

Question:
The loss tangent for a circular cavity resonator is 0.0004.Then the unloaded Q due to dielectric loss is:

Question:
The mode of propagation of propagation supported by coupled line couplers is:

Question:
The output power measured at the 2 ports of the T junction:

Question:
. If a dielectric resonator has a dielectric constant of 49, then the reflection coefficient of the dielectric resonator is:

Question:
18000 ring hybrid with system impedance of 50 Ω has to be designed. Then the characteristic impedance of the arms of the 1800 hybrid is:

Question:
A 50 Ω branch-line Quadrature hybrid has to be designed to operate over a range of frequencies. The branch-line impedance of this coupler so designed is:

Question:
A circular cavity resonator has a wave number of 151, radius of 2.74 cm, and surface resistance of 0.0184Ω. If the cavity is filled with a dielectric of 2.01, then unloaded Q due to conductor loss is:

Question:
A circular cavity resonator is filled with a dielectric of 2.08 and is operating at 5GHz of frequency. Then the wave number is:

Question:
A coaxial cable is air filled with air as dielectric with inner and outer radius equal to 1 mm and 4 mm. If the surface resistivity is 1.84*10-2Ω,then the attenuation due to conductor loss is:

Question:
A cylindrical cavity resonator can be constructed using a circular waveguide.

Question:
A major disadvantage of Lange coupler is:

Question:
A major disadvantage of the lossless T-junction power divider is:

Question:
Coupled line couplers are:

Question:
Example of a non reciprocal device:

Question:
For a 4 wire Lange coupler, if the odd mode and even mode capacitances are 12pF and 9pF respectively, then the equivalent capacitance in terms of two wired coupled line in odd mode is:

Question:
For coupled line coupler, if the voltage coupling factor is 0.1 and the characteristic impedance of the microstrip line is 50 Ω, even mode characteristic impedance is:

Question:
Given that the wave number of a circular cavity resonator is 151 (TE011 mode), and the length of the cavity is twice the radius of the cavity, the radius of the circular cavity operating at 5GHz frequency is:

Question:
If 10 watt is applied to the input port of a standard Wilkinson divider, then the sum of the power measured at the two output ports of the Wilkinson coupler is

Question:
If a microwave network is lossless, then S matrix of the microwave network is:

Question:
If the loss tangent of a rectangular waveguide is 0.0004, then Q due to dielectric loss is:

Question:
In order to obtain the resonant frequency of a rectangular waveguide, the closed cavity has to satisfy:

Question:
Power dividers and couplers are ______ microwave components used for power division or power combining.

Question:
Propagation constant γ is given by:

Question:
Quadrature hybrids are those couplers which are:

Question:
Scattering matrix of a reciprocal network is:

Question:
Schwinger reversed phase coupler is a waveguide coupler designed so that the path lengths for the two coupling apertures are the same for_________

Question:
Short circuited λ/2 transmission line has a quality factor of:

Question:
T- junction is an example for:

Question:
The analysis of Wilkinson coupler is done using:

Question:
The capacitance per unit length of broadside parallel lines with width W and separation d is:

Question:
The in phase combining of power at the coupled port is achieved by means of a _______

Question:
The in phase combining of power at the coupled port is achieved by means of a _______

Question:
The key difference between circuit theory and transmission line theory is:

Question:
The major disadvantage of coupled line coupler is:

Question:
The major disadvantage of dielectric resonators is:

Question:
The mode of the circular cavity resonator used in frequency meters is:

Question:
The propagation constant of TEmn mode of propagation for a cylindrical cavity resonator is:

Question:
The required length of the cavity resonator for l=1 mode (m=1, n=0) given that the wave number of the cavity resonator is 157.01 and the broader dimension of the waveguide is 4.755 cm:

Question:
The S matrix of a Quadrature hybrid is of size 4×4 and the diagonal elements of a matched coupler are all:

Question:
The Wilkinson power divider is a:

Question:
To model a transmission line of infinitesimal length Δz, the lumped element that is not used is:

Question:
Transmission line is a _________ parameter network.

Question:
Unloaded Q of a rectangular waveguide cavity resonator:

Question:
and __ contribute to the admittance of a transmission line in the lumped element representation.

Question:
_ and __ contribute to the impedance of a transmission line in the lumped element representation.

Question:
_________ is a key component in the scalar or vector network analyzer.