Q. A wavelength of 1 mm could be expected in

View solution

Q. The numerical value of directivity of current element of half-wave dipole is 1.76 and 2.15 dB respectively. The directive gain of half-wave dipole over current element will be

View solution

Q. The maximum effective aperture of an antenna which is operating at wavelength of 2 m and has directivity of 100 is

View solution

Q. The waveguides compared to equivalent transmission lines at low frequency are

View solution

Q. The current distribution of a half wave dipole is

View solution

Q. Cassergain feed is used with a parabolic reflector to

View solution

Q. For the same length of arrays, half power beam-width of binomial array

View solution

Q. The effective electrical length of an antenna is __________ its physical length

View solution

Q. The direction in a Yagi Uda antenna is longer than the radiating element.

View solution

Q. The relative permeability is taken as unity for which of the following?

View solution

Q. The disturbance from adjacent power lines is known as

View solution

Q. Magnesium is alloyed with conducting materials for antenna primarily with the purpose of

View solution

Q. Which of the following term applies to troposcatter propagation?

View solution

Q. Maximum effective aperture of a λ/2 antenna is

View solution

Q. Which of the following wave remains unaffected during day and night?

View solution

Q. A microwave link uses only line-of-sight propagation.

View solution

Q. The phase velocity of an EM wave propagating in a hollow metallic rectangular waveguide in the TE10 mode is

View solution

Q. Which of the following laws of electromagnetic theory is associated with the force experienced by two loops of a wire carrying currents?

View solution

Q. The intrinsic impedance of free space

View solution

Q. To couple a coaxial line to a parallel to wire line it is best to use a

View solution