The normalized radiation intensity radiated by an antenna is given by sin 0 cos' 0

The normalized radiation intensity radiated by an antenna is given by sin0cos2 00 0 1800 900 s s 2700 Elsewhere The maximum of the radiation intensity occurs towards = 900 and = 1800. Find the: (a) Exact maximum directivity (dimensionless and in dB). (b) Half-power beamwidth (in degrees) in the principal azimuth (horizontal) plane. (c) Half-power beamwidth (in degrees) in the principal elevation (vertical) plane. (d) Maximum directivity (dimensionless and in dB)