Because of the presence of the dielectric, the phase velocity of a surface wave is:
1.Greater than that in vacuum
2.Lesser than that in vacuum
3.Independent of the presence of dielectric
4.Insufficient data
Cutoff frequency fC for TEM mode of propagation is:
1.Fc= (2n-1)c/4d√εr -1
2.Fc= (2n-c)/2d(√εr-1)
3.Fc= (2n-1)/4d(√εr)
4.Fc= (2n-1)/8d√εr – 1
If a wave guide has he inner and outer conductor diameters of 0.0645 and 0.0215 inches respectively for a co axial lines then the cut off wave number is:
1.298
2.300
3.285
4.123
In a co axial line with inner and outer diameters of 0.0645 and 0.0215 inches and a Teflon di electric with ∈r=2.2. The highest usable frequency before the TE11 waveguide mode starts to propagate is:
1.16.8 GHz
2.117.7 GHz
3.15.3 GHz
4.8.4 GHz
In television systems the characteristic impedance of the cables used is:
1.75Ω
2.150Ω
3.100Ω
4.50Ω
Surface waves are typical by a field that decays ______away from the dielectric surface, with most of the field contained in or near the dielectric.
1.Linearly
2.Exponentially
3.Cubical
4.Field remains a constant
SWR standing wave ratio has to be ________for co axial connector.
1.Low
2.High
3.Infinite
4.Cannot be calculated
The commercially used co axial cable and connectors used has a characteristic impedance is:
1.50Ω
2.100Ω
3.33.34Ω
4.66.6Ω
The cutoff frequency in TM1 mode for the propagation of EM waves on dielectric slab of relative permittivity 2.6 and thickness 20 mm is:
1.6.5 GHz
2.5.92 GHz
3.4 GHz
4.2 GHz
The dominant waveguide mode of a co axial line is:
1.TE11 mode
2.TE01 mode
3.TM01 mode
4.TEM mode
The first propagating mode on a grounded dielectric is:
1.TMO mode
2.TM1 mode
3.TM2 mode
4.TM3 mode
The frequency range for N type co axial connector is:
1.8-12 GHz
2.11-18 GHz
3.14-20 GHz
4.2-8 GHz
The frequency range of SMA co-axial connector used most commonly is:
1.18-25 GHz
2.25-50 GHz
3.11-18 GHz
4.8-12 GHz
What are the connectors used in pairs called?
1.Jack and plug
2.Male and female connectors
3.Both the mentioned
4.None of the mentioned