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Strip lines are used at

Strip lines are used at

Antenna used for direction finding is

Antenna used for direction finding is

The phase velocity in a coaxial line is

The phase velocity in a coaxial line is

A parabolic antenna produces a radiation pattern which is

A parabolic antenna produces a radiation pattern which is

Ground wave propagation is useful for

Ground wave propagation is useful for

Antenna used for T.V. broadcasting is

Antenna used for T.V. broadcasting is

During day time ionosphere consist of

During day time ionosphere consist of

The absorption of EM wave by the atmosphere depends on

The absorption of EM wave by the atmosphere depends on

Microwave signals follow the curvature of the earth and the phenomenon

Microwave signals follow the curvature of the earth and the phenomenon

The effective height of a vertical radiator can be increased by

The effective height of a vertical radiator can be increased by

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

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

Broadcasting antennas are generally

Broadcasting antennas are generally

In order to receive a vertical polarized wave, the conductor of the dipole should be mounted

In order to receive a vertical polarized wave, the conductor of the dipole should be mounted

The relative permittivity of the ionosphere at ratio frequencies is

The relative permittivity of the ionosphere at ratio frequencies is

Velocity of the wave when it passes from air into sphere

Velocity of the wave when it passes from air into sphere

T.V. broadcasting based on

T.V. broadcasting based on

Tropospheric mode of propagation is used in

Tropospheric mode of propagation is used in

A very reliable service has to be established between two points on earth separated by 1000 km. The band that will be used as

A very reliable service has to be established between two points on earth separated by 1000 km. The band that will be used as

Long distance short wave radio broadcasting based on

Long distance short wave radio broadcasting based on

If WF is the Fermi level, then in a metal at T = 0

If WF is the Fermi level, then in a metal at T = 0

The virtual height of an ionospheric layer is __________ true height

The virtual height of an ionospheric layer is __________ true height

MUF is depend upon

MUF is depend upon

In an home T.V. receiver, the leed in from the antenna is

In an home T.V. receiver, the leed in from the antenna is

Which one of following is correct for broadside array?

Which one of following is correct for broadside array?

For broadside array, maxima will be obtain at

For broadside array, maxima will be obtain at

Half power point directions for broadside is

Half power point directions for broadside is

An end fire array consisting of several half-wave lengths of directive gain 40, then array length will be

An end fire array consisting of several half-wave lengths of directive gain 40, then array length will be

An antenna array pattern is to used for increasing

An antenna array pattern is to used for increasing

If t is relaxation time and tc is average time between collisions, then in an isotropic metal

If t is relaxation time and tc is average time between collisions, then in an isotropic metal

The input impedance for folded dipole antenna (two half dipole) is

The input impedance for folded dipole antenna (two half dipole) is

Which one is not correct for folded dipole antenna?

Which one is not correct for folded dipole antenna?

In cellphone communication base antennas are connected to other base antennas in

In cellphone communication base antennas are connected to other base antennas in

The radiation resistance of a rod tubing antenna is

The radiation resistance of a rod tubing antenna is

Antenna beamwidth is

Antenna beamwidth is

Directivity and beamwidth is related as

Directivity and beamwidth is related as

Maximum effective aperture (Ae)max of short dipole antenna is

Maximum effective aperture (Ae)max of short dipole antenna is

Radiation resistance of half-wave dipole (λ/2) antenna is in free space

Radiation resistance of half-wave dipole (λ/2) antenna is in free space

Parabolic and lens antenna used at

Parabolic and lens antenna used at

Which of following antenna does not depend upon the frequency?

Which of following antenna does not depend upon the frequency?

Beamwidth of an antenna depends upon

Beamwidth of an antenna depends upon