A magnetic field strength of 5 µA/m is required at a point on θ = π/2, 2 km from an antenna in air. Neglecting ohmic loss, how much power must the antenna transmit if it is: (a) An infinitesimal dipole with length λ/50 (b) A dipole of l = 1.5λ (c) A half-wave dipole (d) A quarter-wave monopole

Two antennas located at points A and B are broadcasting radio waves of frequency 96.0 MHz, perfectly in phase with each other. The two antennas are separated by a distance d= 6.20 m. An observer, P, is located on the x axis, a distance x= 84.0 m from antenna A, so that APB forms a right triangle with PB as hypotenuse. What is the phase difference between the waves arriving at P from antennas A and B? A P X 4.594x10-¹ rad Computer's answer now shown above. You are correct. Previous Tries Your receipt no. is 158-6031 > Now observer P walks along the x axis toward antenna A. What is P's distance from A when he first observes fully destructive interference between the two waves? 1.152x10¹ m Computer's answer now shown above. Incorrect. Tries 1/6 Previous Tries If observer P continues walking until he reaches antenna A, at how many places along the x axis (including the place you found in the previous problem) will he detect minima in the radio signal, due to destructive interference? 2.000…

An antenna which radiates in all directions equally with spherical radiation pattern Select one: parabolic antenna dipole antenna O isotropic antenna O none

What will be the electric field associated with an electromagnetic wave having a magnetic field of Hrms=0.25 A/m. The wave is propagating through free space.

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Radio waves normally have their E and B fields in specific directions, whereas visible light usually has its E and B fields in random and rapidly changing directions that are perpendicular to each other and to the propagation direction. Can you explain why?

The Subject is Electromagnetic II .

Electromagnetics Given the field D = 3zp cos(phi) az. Determine DivD at P( p= 2.2, (phi)= 1.7 rad, z = 4) 4 decimals places

2.4 Sa K/s 3G 22 9:58 CH1. Review questions 0 class comments Q1. Find the core diameter for a SMF in the 2nd window if ncore=1.48 & ncladd=1.478 ? Q2. If an incoming ray into a fiber with ncore=1.485 & ncladd=1.47 has an incidence angle of 28(degree) , what's the behaviour of the propagation path along the fiber? Q3. Derive an expression for the chromatic dispersion in a SMF. Q4. If (120 uW) is launched in an (8 km) length fiber,when measuring the Po result was(3 uW) . Calculate Po after (10 km) after adding splices at (1 km) intervals, each giving an attenuation of (1 dB)? Your work No due date + Add work

If the Directivity of an antenna is defined by D = Do sin 0= 1.8 sin 0 Draw/Sketch the polar plot of the Directivity of the antenna and show the computations (for angles: 0°, 30°, 45°, 60° and 90%).