Lumped Element Circuit Model of Transmission Line
The key difference between circuit theory and transmission line theory is:
a) circuit elements
b) voltage
c) current
d) electrical size
d) electrical size
The modes of propagation supported by a rectangular wave guide is:
a) TM, TEM, TE modes
b) TM, TE
c) TM, TEM
d) TE, TEM
b) TM, TE
1. Which mode of propagation is supported by a strip line?
a) TEM mode
b) TM mode
c) TE mode
d) None of the mentioned
a) TEM mode
he lowest mode of TE mode propagation in a circular waveguide is:
a) TE10 mode
b) TE00 mode
c) TE01 mode
d) TE11 mode
c) TE01 mode
For transverse electromagnetic wave propagation, we need a minimum of:
a) 1 conductor
b) 2 conductors
c) 3 conductors
d) bunch of conductors
b) 2 conductors
A hollow rectangular waveguide cannot propagate TEM waves because:
a) Of the existence of only one conductor
b) Of the losses caused
c) It is dependent on the type of the material used
d) None of the mentioned
a) Of the existence of only one conductor
The higher order wave guide modes of propagation can be avoided in a strip line by:
a) Restricting both the ground plate spacing and the sidewall width to less than λd/2
b) Restricting both the ground facing plate spacing and the sidewall width to less than λd
c) Filling the region between 2 plates with di electric
d) Restricting both the ground plate spacing and the sidewall width between λg and λg/2
a) Restricting both the ground plate spacing and the sidewall width to less than λd/2
What is the cutoff frequency for TE₁₁ mode in a circular waveguide of radius 2 cm with P’₁₁= 1.841?
a) 5.5 GHz
b) 4.3 GHz
c) 7.7 GHz
d) 8.1 GHz
b) 4.3 GHz
To model a transmission line of infinitesimal length Δz, the lumped element that is not used is:
a) resistor
b) inductor
c) capacitor
d) transistor
d) transistor
For any mode of propagation in a rectangular waveguide, propagation occurs:
a) Above the cut off frequency
b) Below the cut off frequency
c) Only at the cut-off frequency
d) Depends on the dimension of the waveguide
a) Above the cut off frequency
3. Stripline can be compared to a:
a) Flattened rectangular waveguide
b) Flattened circular waveguide
c) Flattened co axial cable
d) None of the mentioned
c) Flattened co axial cable
In a circular waveguide, if the propagation is in TE21 mode with P21=3.054, with a diameter of 60 mm, then the cutoff frequency for the mode is:
a) 5.6 GHz
b) 6.4 GHz
c) 3.5 GHz
d) 4.8 GHz
d) 4.8 GHz
_________ and __________ contribute to the impedance of a transmission line in the lumped element representation.
a) resistor, inductor
b) resistor, capacitor
c) capacitor, inductor
d) transistor, capacitor
a) resistor, inductor
Dominant mode is defined as:
a) Mode with the lowest cut off frequency
b) Mode with the highest cut off frequency
c) Any TEM mode is called a dominant mode
d) None of the mentioned
a) Mode with the lowest cut off frequency
4. If the dielectric material filled between the round plates of a microstrip line has a relative permittivity of 2.4, then the phase velocity is:
a) 1.3*108 m/s
b) 1.9*108 m/s
c) 3*108 m/s
d) 2*108 m/s
b) 1.9*108 m/s
For a circular waveguide in TM11 mode of propagation with inner radius of 30mm, and the phase constant being equal to 0.3, then the wave impedance is equal to:
a) 0.16 Ω
b) 0.15 Ω
c) 0.5 Ω
d) 0.4 Ω
a) 0.16 Ω
Characteristic impedance of a transmission line is:
a) impedance Z of a transmission line
b) impedance which is a constant at any point on the transmission line
c) reciprocal of admittance of a transmission line
d) none of the mentioned
b) impedance which is a constant at any point on the transmission line
For TE1ₒ mode, if the waveguide is filled with air and the broader dimension of the waveguide is 2 cm, then the cutoff frequency is:
a) 5 MHz
b) 7.5 MHz
c) 7.5 GHz
d) 5 GHz
c) 7.5 GHz
If the phase velocity in a stripline is 2.4*108m/s, and the capacitance per unit length of a micro stripline is 10pF/m, then the characteristic impedance of the line:
a) 50 Ω
b) 41.6 Ω
c) 100 Ω
d) None of the mentioned
b) 41.6 Ω
In TM mode, what is the first propagating mode?
a) TM01 mode
b) TM11 mode
c) TM12 mode
d) TM10 mode
a) TM01 mode