Efficiency of electrically small antennas combined with matching networks

The efficiency of an antenna combined with a matching network constructed from elements with finite
Q
is determined by applying the principle of conservation of energy. The conditions which must be satisfied to obtain maximum efficiency are examined. An analysis shows that for many electrically small antennas the conditions for maximum efficiency can be met using a simple L section as the matching network. Examples are presented to show the importance of including the matching network in efficiency calculations for electrically small antennas.