Single-cell metamaterial loading technique for miniaturization of monopole antenna

A left-handed metamaterial (LHM) loaded monopole antenna is presented in this paper for size reduction. The antenna is composed of a single cell of LHM and a monopole element. To realize miniaturization, the strategy of increasing the coupling between LHM cell and the unloaded monopole antenna was chosen for the proposed antenna. The configuration reduces the resonant frequency of monopole by 13.15%. The proposed antenna is matched with a stepped impedance transformer, offers high efficiency, high gain and exhibits a multi-band property.