Microwave Communication Questions

• A rectangular waveguide has two stubs each length connected at the source end. The stubs are short circuted. Then
• A transmission line discontinuity is defined as any interruption in the uniformity of the line.
• Interference generated by electrical equipment and automobile ignition systems when observed closed to earth is
• Which of the following is a balanced line?
• Consider the following statements Usable bandwidth of ridge wave guide is more than that of rectangular waveguide. For a given value of TM10 cutoff frequency the cross section of ridge wave guide is lesser that that of rect angular waveguide. Ridge wave guide has higher conductor losser than a rectangular waveguide. Ridge guide has higher conductor losser than a rectangular waveguide. Which of the above statements are correct?
• To study electromagnetic radiations from astronomical objects, radio astronomers use
• In laboratory experiment the output from reflex klystron is moderated by square wave because
• In a TWT the loss in attenuator is
• For a waveguide, which of the following statements is wrong?
• A magic tee is to be used as CW duplexer. Then port 1, port 2, port 3 (E arm), port 4 (H arm) respectively should be connected to
• Two identical hybrid tees are joined as shown in the given figure. If 16 mW power is fed into port 1, the power output at ports 2 , 3, 1', 2', 3' respectively is
• In p mode of operation of magnetron the spikes due to phase focussing effect rotate at an angular velocity corresponding to
• If a and b are the width and height of rectangular wave-guide the cut off wavelength λc for TE20 mode is equal to
• Assertion (A): In rectangular waveguide TE01 mode is just TE10 mode rotated by 90°. Reason (R): When a rectangular waveguide is rotated by 90°, the broad and narrow dimensions get interchanged.
• In microwave system, waveguide twists
• In TE10 mode the largest electric field in a rectangular wave guide, occurs
• TM01 mode in circular waveguide is analogous to
• The scattering matrix of magic tee is
• In a coaxial line
• In a shield helix