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The embedded element patterns of two parallel half-wavelength dipoles are calculated for various source impedances and dipole spacings by using classical formulas for self and mutual impedances. These are used to calculate the effective diversity gain, which is shown to vary with source impedances and dipole spacing. The results are verified using a method of moments (MoM) code for wire antennas and via measurements in a reverberation chamber. The numerical model is used to find the source impedances that maximize the effective diversity gain, which has a maximum for the computed cases when the source impedances are conjugate-matched to the input impedances of each of the embedded dipole elements. Then the two antenna ports are uncorrelated.
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Rosengren et al. (2006) studied this question.
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