General equations Clause Samples

General equations. The theoretical directional antenna radiation pattern is calculated by means of the following equation, which sums the field strength from each element (tower) in the array. ET (ϕ, θ) = KL ∑ Fi fi ( θ) / ψi + Si cos θcos ( iϕ− ) ϕ (1) where: fi (θ) = cos (Gi sin θ) − cos Gi (2) where: (1 − cos Gi ) cos θ ET(ϕ, θ) : theoretical inverse distance field strength at one kilometre in mV/m for the given azimuth and elevation; KL : multiplying constant in mV/m which determines the pattern size (see paragraph 2.5 below for derivation of KL);