A compact CPW fed metamaterial staircase planar antenna

A compact size staircase planar antenna using composite metamaterial with coplanar waveguide fed is presented. The staircase ground is etched from the FR4 epoxy substrate with the thickness of 1.6mm. The proposed antenna is of size 27 × 31.7 mm². The negative index metamaterial consisting of SRR and CRR with staircase ground is employed to design this antenna. A pair of slot is introduced on the staircase. By wavering the length and width of the slot above the staircase ground the triband operation of the proposed antenna is attained. The projected staircase planar antenna operates in three bands that cover 1.3-2.3 GHz, 2.8-5.1 GHz and 7.4-8.8 GHz. The proposed antenna is scrutinised by Ansoft HFSS finite element method. The omnidirectional radiation pattern, return loss and better Voltage Standing Wave ratio is achieved splendidly.