- 4 For Most Practical Antennas Their Radiation Patterns Are So Complex That Closed Form Mathematical Expressions Are N 1 (41.79 KiB) Viewed 42 times
4. For most practical antennas, their radiation patterns are so complex that closed- form mathematical expressions are not available. In such a case the radiation intensity of practical antenna is given by U(0,0) = {Bos (Bosinesin² 0,0 ≤0 ≤π,0⁰ ≤O≤n elsewhere Analyse the maximum directivity numerically by using (a) Prad = Bo () () [₁ sin²₁] [₁ sin²0₁] With 0₁ i(7), ,i = 1,2,3,4,... N and ₁ = (=), j = 1,2,3,4,... M. Compare it with the exact value. (b) The exact value is given by Prad = Bof sin²pdo fsin²0do.