Q. Dish antennas are

View solution

Q. Long distance short-wave radio broadcasting uses

View solution

Q. The affect of ground on radiation pattern is to

View solution

Q. If a electromagnetic signal is incident at 0° in a waveguide then at other port of waveguide we will get

View solution

Q. An antenna having a high Q has

View solution

Q. The polarization of dielectric materials results in

View solution

Q. An electron when placed midway between two equal and opposite charges will

View solution

Q. Which of the following is the abnormal phenomena observed in the ionosphere?

View solution

Q. In a loss-less transmission line

View solution

Q. Which layer is least important in high frequency propagation?

View solution

Q. Distances near the skip distance should be used for sky-wave propagation

View solution

Q. End fire array has a dipole spacing of λ/2.

View solution

Q. Which one of following is correct for broadside array?

View solution

Q. The effective length of an antenna (Le) is

View solution

Q. Curl of gradient A is

View solution

Q. When microwave signals follow the curvature of the earth, this is known as

View solution

Q. Characteristic wave impedance is

View solution

Q. Consider isotropic radiator radiating a power of 1 watt. At a distance of 1 metre, the power per unit area with equal

View solution

Q. Cassegrain feed is used with a parabolic reflection to

View solution

Q. Which of the wave remains unaffected whether it is a day or night?

View solution