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Microwave Engineering MCQs Set-3

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1. The dominant waveguide mode of a co axial line is:




2. 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:




3. 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:




4. The commercially used co axial cable and connectors used has a characteristic impedance is:




5. In television systems the characteristic impedance of the cables used is:




6. SWR standing wave ratio has to be ________for co axial connector.




7. What are the connectors used in pairs called?




8. The frequency range for N type co axial connector is:




9. The frequency range of SMA co-axial connector used most commonly is:




10. 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.




11. Because of the presence of the dielectric, the phase velocity of a surface wave is:




12. 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:




13. Cutoff frequency fC for TEM mode of propagation is:




14. The first propagating mode on a grounded dielectric is: