D.Equivalent circuits for spherical waves The total energy stored outside the sphere is equal to the sum of the corresponding energies associated with each spherical wave. COUPLING NETWORK The is no coupling between any two of INPUT REPRESENTING the spherical waves outside the ANTENNA STRUCTURE sphere because orthogonal properties 26 We can use a number of independent equivalent circuits to represent the 2 spherical wavesThe total energy stored outside the sphere is equal to the sum of the corresponding energies associated with each spherical wave. The is no coupling between any two of the spherical waves outside the sphere because orthogonal properties We can use a number of independent equivalent circuits to represent the spherical waves D. Equivalent circuits for spherical waves