Wheeler and Fano Impedance Matching [Antenna designer´s notebook]

A recent series of articles in this Magazine´s Antenna Designer´s Notebook column highlighted Fano´s fundamental work on the limitations of the impedance matching of arbitrary impedances and its application to antenna design. Lopez, using Harold Wheeler´s methodology, constructed a closed-form solution to the nonlinear simultaneous equations of Fano. This article presents the Wheeler methodology that was the basis for this work, and is still invaluable in the understanding of optimum impedance matching.