#### Antenna efficiency tool

Reflection, conduction and dielectric losses. |

The total antenna efficiency takes into account losses at the input terminals and within the structure of the antenna. The losses may be due, referring to the figure below, to:

This tool calculates the total antenna efficiency using the following equation:

e_{0}= e_{r} e_{cd}

where

e_{0} = total antenna efficiency

e_{r} = reflection (mismatch) efficiency = (1 - |Τ|2)

e_{cd} = antenna radiation efficiency

Τ = voltage reflection coefficient at the input terminals of the antenna [Τ=(Z_{in}-
Z_{0})/( Z_{in}- Z_{0}) where

Z_{in} = antenna input impedance, Z_{0} = characteristic impedance of the transmission line].