2.11. The normalized radiation intensity of a given antenna is given by (C) U=sin²0 sin³ Ø (d)U=sin20 sin Ø The intensity exists only in the 0s0Sn, OsPSn region, and it is zero elsewhere. Find the (a) Exact directivity (dimensionless and in dB). (b) Azimuthal and elevation plane half-power beam widths (in degrees). Sol/ 4п U тах D= P rad

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