Q. Maximum power transfer will take place in a practical antenna if (XL = Load Reactance, XA Antenna Reactance)

View solution

Q. VSWR is related with reflection co-efficient as

View solution

Q. Which of the following statement is incorrect?

View solution

Q. The propagation constant of a transmission line is

View solution

Q. Many circles are drawn in a Smith chart used for transmission line calculations. The circle shown in the figure represents

View solution

Q. Which one set of the following Maxwell's equation gives the basic idea of radiation ?

View solution

Q. Power gain and directivity related with, Gp power gain, Gd directive gain

View solution

Q. The number of free electrons in acceptor atom is

View solution

Q. Consider a loss less antenna with a directive gain of + 6 dB. If 1 mW of power is fed to it the total power radiated by the antenna will be

View solution

Q. Which of the following should dominant wave have?

View solution

Q. Find the noise factor for an antenna at 27°C with equivalent noise temperature 30°K

View solution

Q. The displacement flux density at a point on the surface of a perfect conductor is D = 2(ax - √3 az)c/m² pointing away from the surface. The charge density at that point c/m² will be

View solution

Q. Characteristic impedance of a transmission line is 50 Ω. Input impedance of the open circuited line. Zoc = 100 + J150 Ω. When transmission line is short circuited, then value of the input impedance will be

View solution

Q. A transmission line is feeding 1 watt of power to a horn antenna having a gain of 10 dB. The antenna is matched to the transmission line. The total power radiated by the horn antenna into the free space is

View solution

Q. A parallel polarized wave is incident from air into paraffin having relative permittivity 3, the value of its Brewster angle is

View solution

Q. In a conductor which of the following relations hold good?

View solution

Q. The radiation resistance of a λ/16 wire dipole in free space will be nearly

View solution

Q. The phase angle corresponding to λ/4 in a standing-wave pattern is

View solution

Q. A hollow rectangular waveguide has dimensions a = 2b. Calculate the amount of attenuation, if the frequency is 3 GHz, and b = 1 cm.

View solution

Q. Calculate the directivity of an antenna for θE = 30°, θH = 60

View solution