2A. The normalized electric field strength in the far field of an antenna in free space is given as follows. |E| = {√sin²0 cos³ 0≤0 ≤ 1,0 ≤ $ 57/2 other a. Calculate the exact value (D) of the antenna's directivity. b. Calculate the directivity of the antenna using the approximation equation and interpret the result..

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An antenna with power P= 2.2 x 10^3 W is radiating spherical electromagnetic waves. Consider a place which is d = 820 m away from the antenna. - Express I in terms of the electric magnitude Emax, the speed of light c, and the permeability of free space U0.  AND - Solve for the numerical value of Emax in volts per meter.

A rectangular guide with dimensions of 5.7cmX2.524cm has air as its dielectric and operates at a frequency of 4.21GHz. Get wavelength in TE10 mode guide (in mm),group speed in TE10 mode guide (in Mm / s),the maximum magnitude of the electric field phasor of the TE10 mode (in KV / m), if the power carried by the fundamental mode at the frequency of 1.6 * fc10 is 600KW