Spectral-domain radiation Q analysis of a planar dipole over a conducting ground plane

The exact radiation quality factor (Q) of a horizontal planar dipole antenna over a conducting ground plane is presented. The stored energies as well as the radiated power are evaluated in the 2-D spectral domain. In the half space above the antenna, the energies are found from surface integrals at the antenna height, following existing techniques. Stored energies between the antenna and the ground plane are evaluated using volume integrals. The effect of the ground plane on Q is discussed.