Microwave Communication Questions

• The use of coaxial microwave line should be restricted to frequencies
• In a cable with ∈r = 4, the wave velocity is
• If QL is loaded Q, QE is external Q and QU is unloaded Q of a microwave resonator, then
• The main advantage of using micro waves for communications is
• TE10 mode of propagation of electromagnetic energy in waveguides can be thought of as
• Assertion (A): An artificial transmission line can be used as a pulse generator. Reason (R): A pulse function is used very frequently in network analysis.
• Power monitor and reflectometer use the principle of
• Dielectric constant and conductivity of rocky soil and flat sandy soil are around
• Consider the following statements, SWR of a transmission line is infinite when the load is a short circuit a complex impedance an open circuit a pure reactance Which of the above statements are correct?
• Compared to coaxial lines, the advantages of wave guides are
• A rectangular waveguide has width a. Then at the cutoff frequency (with corresponding wave length λc)
• Consider the following statements Fading of signals is generally greatest near radio horizon. Fading of signals is generally greatest in shadow zone. Fading is small when a good optical path is present. Which of the above statements are correct?
• A line of length less than and open circuited at far end behaves as
• Ridge waveguide is essentially a form of capacitively loaded guide.
• The arrangement in the given figure is a hybid T. If 100 mW fed at port 1, the power reflected back at port 1 is
• Frequency range for satellite communication is
• A TEM wave is incident normally on a perfect conductor. The E and H fields at boundary will respectively be
• As compared to LED, LASER has higher emission efficiency no tuning arrangement narrow spectral width provision for confinement Of these statements
• Consider the following statements about a magic tee The collinear arms are isolated from each other. On of the collinear arms is isolated from E arm. On of the collinear arms is isolated from H arm. E and H arms are isolated from each other. Of the above statements
• A directional coupler is used