Q. In a microwave coaxial cable the inner conductor radius is a and inner radius of outside conductor is b. For TE₁₁ mode the cut off wavelength is about

View solution

Q. The rotation of direction of E field of a linearly polarized wave passing through a magnetised ferric medium is called

View solution

Q. If air pressure in a rectangular waveguide is increased the maximum power handling capacity

View solution

Q. A directional coupler is used to determine

View solution

Q. For air filled circular waveguides

View solution

Q. A short circuited stub is preferred to an open circuited stub because an open circuited stub

View solution

Q. If the peak transmitted power in a radar is increased by a factor 81, the maximum range is increased by a factor of

View solution

Q. Radar is essentially an echo ranging system

View solution

Q. In Gunn diode electrons are transferred from

View solution

Q. Consider the following statements about radar Beacon

1. It is also called transponder.
2. It includes pulse transmitter, receiver and antenna.
3. It replies with full power even when the signal receives is weak.

Which of the above statements are correct?

View solution

Q. Consider the following statements about instrument landing system of aircraft

1. It ensures correct landing under conditions of low visibility.
2. It consists of runaway localizer, glide path equipment and marker beacons.
3. It is basically a blind landing system.

Which of above statements are correct?

View solution

Q. Effect of loading of line is

View solution

Q. Which mode has the minimum cutoff frequency in rectangular wave guides?

View solution

Q. As compared to dimensions of most feeds, the skin depth at microwave frequencies is

View solution

Q. In microwave communication links the fading due to rain occurs. The methods to solve this problem include

View solution

Q. Which of the following is not used as a microwave mixer or detector?

View solution

Q. Integrated fin line can be utilized as a medium for constructing millimeter wave circuits.

View solution

Q. The secondary constants of a line are

View solution

Q. In a loss less line the propagation constant is equal to

View solution

Q. A rectangular wave guide has two stubs each of length λ/4 connected at the source end. The stubs are circuited. Then the stubs present

View solution