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Derived Quantities

Antenna output quantities include the far field datasets and derived quantities like antenna gain and total radiated power. The far field quantities contained under Antenna Results are Directivity, Gain, Max. Radiated Power/Solid Angle , and Total Radiated Power. The Max. Radiated Power/Solid Angle is the maximum radiation intensity on the far field sphere, denoted by Imax in this discussion. Total Radiated Power is the integral of the radiated power over the sphere, denoted by Ptot. Directivity is calculated from these quantities, according to

Gain is calculated from the directivity, according to

where ε, the antenna efficiency, has been computed as the ratio of Ptot to antenna input power.

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