Miniaturization of a patch antenna with dispersive double negative medium substrates

In this letter, a potential application of practically dispersive double negative medium substrates on the dimensions miniaturization of patch antennas is explored. By using the transmission line theory, it is shown that the use of such a practically dispersive double negative material could not offer such a broadband characteristic as a hypothetical nondispersion double negative medium, but it can indeed greatly miniaturize the dimensions of the patch antenna.