B.Tech 3 ECE II Sem - Mid-II Test - 2019-20

Antennas and Wave Propagation

1. This test contains 20 multiple choice questions
2. Each question carries one mark
3. Maximum marks : 20
4. Duration : 30 minutes
5. This test can be attempted only once. If there are multiple attempts by creating different logins, all your tests stand cancelled, and no marks will be awarded.

Full Name:

Roll No

Email:

The region next to the reactive near-field is called as______

The efficiency of antenna aperture is

The angle at which two plane reflectors are joined is called___

The open end of the parabolic reflector is called

The principle of equality of electrical path length is known as

The disadvantage (draw back) of parabolic reflector is---------

The no. Of images formed for a square corner reflector, using method of images are

What is the nature of radiation pattern of an isotropic antenna?

The binomial array has _____________ side lobe level

_______________ is defined as the ratio of total far field to the far field maximum

Gain of an antenna can be measured by using ____________ method/methods

In pattern multiplication, the total phase pattern is obtained by ____________ collection of isotropic point sources and the phase pattern of all the individual sources

Which of the following is/are the types of sources of errors in antenna measurement?

____________ array uses Pascal triangle to select the coefficient or amplitudes of elements

The E-Layer of Ionosphere exists between

The distance covered by a direct space wave from the transmitting antenna to the receiving antenna is

The frequency below which the entire power gets absorbed is referred to as

Ground wave propagation is useful for

Space wave propagation is useful for

The change of orientation of vertically polarized ground wave at the surface of the earth is called