The real power radiated by short dipole is _____________ of the infinitesimal dipole.Select one:a. one-fourthb. one-thirdc. one-halfd. None of the above

The centre of a half-wave dipole is placed at the origin of the standard spherical coordinate system with the wire parallel to the z axis. This centre-fed dipole is in resonance at 0.9 GHz and the total radiated power is 200 W.(a) Calculate the effective height vector in the xy plane (θ = 90°).(b) Find the electric field vector (peak value) radiated by the dipole in the far-field region.(c) A second similar dipole is also placed in the xy plane parallel to the first at a distance of 1500 m. Neglecting losses and assuming the free-space condition, calculate the voltage U (peak value) induced in the dipole, i.e. the voltage in the equivalent receiving circuit.(d) Based on the voltage U, calculate the maximum rms power available at the matched load

Consider a half-wave dipole that is radiating into free space when the origin is at the centre of the dipole and its axis is aligned with the z axis. The input power fed to the dipole is 300 W. If we assume that the dipole has an efficiency of 75%, calculate the power density at point P(r,θ,φ) of the spherical coordinate system with r = 300 m, θ=75° and φ=45°.

The question is in relation to the antenna analysis. Which of the statement below is correct?Select one:a.A half wave dipole antenna has a maximum directive gain of 2.15 dBb.A long antenna is required to reduce radiation resistancec.A half wavelength dipole has a maximum directive gain of 2.15 dBid. Image theory is use to increase antenna radiated power and directivitye.A half-wave length dipole antenna has a radiation resistance of 50 Ohms

Which of the following has the largest dipole moment?Question 32Select one:a.BF3b.NH3c.O3d.OCS

The figure above shows the radiation pattern of an antenna in linear scale.a). If the main lobe magnitude is 4.1, calculate the magnitude of its half power point. b). If the main lobe magnitude is 7 dB, calculate the magnitude of this new half power