Question

Relation between beam solid angle Ω, horizontal half-power beam width ∅A, vertical half-power beam width ∅E is __________

(a) Ω≈∅A.∅E

(b) Ω≈∅A+∅E

(c) Ω≈∅A/∅E

(d) Ω≈∅A-∅E

The question was posed to me in unit test.

My question is taken from Antenna Characteristics topic in division Antenna Parameters of Antennas

Answer 1

Right choice is (a) Ω≈∅A.∅E

The explanation is: Half-power beam width is the angular range of antenna pattern in which half power is radiated. The relation between Ω, ∅A, ∅E is given by Ω≈∅ A.∅E.