If the reflection co efficient of a 2 port network is 0.5 then the return network loss in the network is:
1.6.5 dB
2.0.15 dB
3.6.020 dB
4.10 dB
Posted Date:-2022-05-29 12:33:03
Scattering matrix for a lossless matrix is:
1.Unitary
2.Symmetric
3.Identity matrix
4.Null matrix
Posted Date:-2022-05-29 12:31:39
A modern device that replaces a slotted line is:
1.Digital CRO
2.generators
3.network analyzers
4.computers
Posted Date:-2022-05-29 12:47:20
A short transmission line stub can be used to provide a shunt capacitance of:
1.0-0.1µF
2.0-0.1pF
3.0-0.1nF
4.1-10pF
Posted Date:-2022-05-29 12:43:18
A slotted line can be used to measure _____ and the distance of _____________ from the load.
1.SWR, first voltage minimum
2.SWR, first voltage maximum
3.characteristic impedance, first voltage minimum
4.characteristic impedance, first voltage maximum
Posted Date:-2022-05-29 12:46:06
ABCD matrix is used:
1.When there is two or more port networks in the cascade
2.To represent a 2 port network
3.To represent a 2 port network
4.To represent the impedance of a microwave network
Posted Date:-2022-05-29 12:34:31
ABCD matrix of the cascade connection of 2 networks is equal to:
1.Product of ABCD matrices representing the individual two ports
2.Sum of the ABCD matrices representing the individual two ports
3.Difference of the ABCD matrices representing the individual two ports
4.Sum of transpose of ABCD matrices representing the individual two ports
Posted Date:-2022-05-29 12:35:25
Admittance and impedance matrices of a micro waves network are related as:
1.[Y] = [Z]-1
2.[Y] = [Z]
3.[V] = [Z] [Z]-1
4. [Z] = [V] [V]-1
Posted Date:-2022-05-29 12:27:22
An ‘L’ network is required to match a load impedance of 40Ω to a transmission line of characteristic impedance 60Ω. The components of the L network are:
1.28.28+j0 Ω
2.28.28+j1 Ω
3.50Ω
4.48.9Ω
Posted Date:-2022-05-29 12:41:09
Fields of TEM mode on strip line must satisfy:
1.Laplace’s equation
2.Ampere’s circuital law
3.Gaussian law
4.None of the mentioned
Posted Date:-2022-05-29 12:13:06
For a lossless network, the impedance and admittance matrices are:
1.Real
2.Purely imaginary
3.Complex
4.Rational
Posted Date:-2022-05-29 12:28:39
For a reciprocal network, Z matrix is:
1.A unit matrix
2.Null matrix
3.Skew symmetric matrix
4.Symmetric matrix
Posted Date:-2022-05-29 12:28:06
For a simple admittance Y, the ABCD parameters are:
1.A=1, B=0, C=Y, D=1
2.A=Z, B=1, C=1, D=0
3.A=1, B=0, C=Z, D=1
4.A=1, Y=B, C=0, D=1
Posted Date:-2022-05-29 12:36:42
For most of the micro strip substrates:
1.Conductor loss is more significant than di electric loss
2.Di electric loss is more significant than conductor loss
3.Conductor loss is not significant
4.Di-electric loss is less significant
Posted Date:-2022-05-29 12:17:23
For simple impedance Z, the ABCD parameters are:
1.A=1, Z=B, C=0, D=1
2.A=0, B=1, C=1, D=0
3.A=Z, B=1, C=1, D=0
4.A=1, B=0, C=Z, D=1
Posted Date:-2022-05-29 12:36:03
If SWR=1.5 with a wavelength of 4 cm and the distance between load and first minima is 1.48cm, then the reflection coefficient is:
1.0.0126+j0.1996
2.0.0128
3.0.26+j0.16
4. none of the mentioned
Posted Date:-2022-05-29 12:49:38
If the dielectric material used between the grounded plates of a stripline is 2.2, when the strip line operating at 8 GHz, the wavelength on stripline is:
1.1.2 cm
2.2.52 cm
3.0.15 cm
4.3.2 cm
Posted Date:-2022-05-29 12:12:33
If the effective width of the center conductor is 3 mm and the distance between the two ground plates is 0.32 cm with the material of the dielectric used having a relative permittivity of 2.5, then what is the characteristic impedance of the strip line?
1.50Ω
2.71.071Ω
3. 43.24Ω
4.121Ω
Posted Date:-2022-05-29 12:10:50
If the loss tangent is 0.001 for a stripline operating at 12 GHz with the relative permittivity of the dielectric material being used equal to 2.6, then the conductor loss is:
1.0.102
2.0.202
3.0.001
4.0.002
Posted Date:-2022-05-29 12:11:52
If the reflection co efficient of a 2 port network is 0.25 then the return network loss in the network is:
1.12.05 dB
2.0.15 dB
3.20 dB
4.10 dB
Posted Date:-2022-05-29 12:33:41
If the reflection coefficient of a transmission line is 0.4, then the standing wave ratio is:
1.1.3333
2.2.3333
3.0.4
4.0.6
Posted Date:-2022-05-29 12:48:44
If the standing wave ratio for a transmission line is 1.4, then the reflection coefficient for the line is:
1.0.16667
2.1.6667
3.0.01667
4.0.96
Posted Date:-2022-05-29 12:47:55
If the wave number of an EM wave is 301/m in air , then the propagation constant β on a micro strip line with effective di electric constant 2.8 is:
1.602
2.503.669
3.150
4.200
Posted Date:-2022-05-29 12:16:46
Impedance matching sensitive receiver components may improve the _____ of the system.
1.noise
2.SNR
3.amplification factor
4.thermal noise
Posted Date:-2022-05-29 12:38:40
Large values of inductance can be realized by:
1.loop of transmission line
2.spiral inductor
3.coils of wires
4.none of the mentioned
Posted Date:-2022-05-29 12:42:16
Micro strip can be fabricated using:
1.Photo lithographic process
2.Electrochemical process
3.Mechanical methods
4.None of the mentioned
Posted Date:-2022-05-29 12:13:50
Microstrip line can support a pure TEM wave.
1.True
2.False
3.Microstrip supports only TM mode
4.Microstrip supports only TE mode
Posted Date:-2022-05-29 12:14:54
One of the most important factors to be considered in the selection of a particular matching network is:
1.noise component
2.amplification factor
3.bandwidth
4.none of the mentioned
Posted Date:-2022-05-29 12:39:15
S parameters are expressed as a ratio of:
1.Voltage and current
2.Impedance at different ports
3.Indecent and the reflected voltage waves
4.None of the mentioned
Posted Date:-2022-05-29 12:29:23
Scattering matrix for a reciprocal network is:
1.Symmetric
2.Unitary
3.Skew symmetric
4.Identity matrix
Posted Date:-2022-05-29 12:31:09
Slotted line is a transmission line configuration that allows the sampling of:
1.electric field amplitude of a standing wave on a terminated line
2.magnetic field amplitude of a standing wave on a terminated line
3.voltage used for excitation
4.current that is generated by the source
Posted Date:-2022-05-29 12:45:18
Stripline can be compared to a:
1.Flattened rectangular waveguide
2.Flattened circular waveguide
3.Flattened co axial cable
4.None of the mentioned
Posted Date:-2022-05-29 12:08:43
The device used to get the measurement of S parameters of n- port micro wave network is:
1.CRO
2.Network analyzer
3.Circulator
4.Attenuator
Posted Date:-2022-05-29 12:30:37
The effective di electric constant of a micro strip line with relative permittivity being equal to 2.6, with a width of 5mm and thickness equal to 8mm is given by:
1.2.6
2.1.97
3.1
4.2.43
Posted Date:-2022-05-29 12:16:10
The effective di electric constant of a microstrip line is:
1.Equal to one
2.Equal to the permittivity of the material
3.Cannot be predicted
4.Lies between 1 and the relative permittivity of the micro strip line
Posted Date:-2022-05-29 12:15:35
The major limitation of a lumped elements matching ‘L’ network is:
1.they are not equally efficient at higher frequencies as they are at lower frequencies.
2.size of the network
3.they restrict flow of current
4.none of the mentioned
Posted Date:-2022-05-29 12:40:31
The matched network is placed between:
1.load and transmission line
2.source and the transmission line
3.source and the load
4.none of the mentioned
Posted Date:-2022-05-29 12:37:29
The mode of propagation in a microstrip line is:
1.Quasi TEM mode
2.TEM mode
3.TM mode
4.TE mode
Posted Date:-2022-05-29 12:14:17
The one below among others is not a type TEM line used in microwave networks:
1.Co-axial wire
2.Micro strip line
3.Strip lines
4.Surface guide
Posted Date:-2022-05-29 12:24:33
The one below is the only micro wave network element that is a TEM line:
1.Co-axial cable
2.Rectangular wave guide
3.Circular wave guide
4.Surface wave guide
Posted Date:-2022-05-29 12:25:14
The relation between incident voltage matrix , reflected voltage matrix and S matrix for a microwave network:
1.[v-] = [s] [v+].
2.[v+] = [s] [v-].
3.[v-] [v] = [s].
4.[s] = [v] [v-].
Posted Date:-2022-05-29 12:30:01
The relation between voltage, current and admittance matrices of a microwave network is:
1.[I] = [Y] [V]
2.[Y] = [V] [I]
3.[I] = [Z] [V]
4.[V] = [Z]-1[I]
Posted Date:-2022-05-29 12:26:45
The relation between voltage, current and impedance matrices of a microwave network is:
1.[V] = [Z][I]
2.[Z] = [V][I]
3.[I] = [Z][V]
4.[V] = [Z]-[I]
Posted Date:-2022-05-29 12:26:06
The simplest type of matching network, L section consists of _______ reactive elements.
1.One
2.two
3.four
4.six
Posted Date:-2022-05-29 12:39:44
The wave number in air for EM wave propagating on a micro strip line operating at 10GHz is given by:
1.200
2.211
3.312
4.209
Posted Date:-2022-05-29 12:17:53
The wave number of a stripline operating at a frequency of 10 GHz is:
1.401
2.155
3.206
4.310
Posted Date:-2022-05-29 12:11:23
When a transmission line is matched to a load using a matched network, reflected waves are present:
1.between the load and the matched network
2.between the matched network and the transmission line
3.between the source and the transmission line
4.between the matched network and source
Posted Date:-2022-05-29 12:38:08
Which mode of propagation is supported by a strip line?
1.TEM mode
2.TM mode
3.TE mode
4.None of the mentioned
Posted Date:-2022-05-29 12:09:14
Which of the following material is not used in the fabrication of resistors of thin films?
1.nichrome
2.tantalum nitride
3.doped semiconductor
4.pure silicon
Posted Date:-2022-05-29 12:41:46
With an increase in the operating frequency of a micro strip line, the effective di electric constant of a micro strip line:
1.Increases
2.Decreases
3.Independent of frequency
4.Depends on the material of the substrate used as the microstrip line
Posted Date:-2022-05-29 12:23:10