In this expression, S(r) is the power density at (r,θ,ϕ); i.e., at a distance r in the direction (θ,ϕ). Save(r) is the average power density at that distan...In this expression, S(r) is the power density at (r,θ,ϕ); i.e., at a distance r in the direction (θ,ϕ). Save(r) is the average power density at that distance; that is, S(r) averaged over all possible directions at distance r. Directivity can also be defined for the receive case, in which it quantifies the effectiveness of the antenna in converting power in an incident wave to power in a load attached to the antenna.
In this expression, S(r) is the power density at (r,θ,ϕ); i.e., at a distance r in the direction (θ,ϕ). Save(r) is the average power density at that distan...In this expression, S(r) is the power density at (r,θ,ϕ); i.e., at a distance r in the direction (θ,ϕ). Save(r) is the average power density at that distance; that is, S(r) averaged over all possible directions at distance r. Directivity can also be defined for the receive case, in which it quantifies the effectiveness of the antenna in converting power in an incident wave to power in a load attached to the antenna.
