Indian Journal of Science and Technology

Objective: To design a compact multiband antenna with planar metamaterial unit cell loading in the ground structure. Methods/Analysis: The metamaterial unit cells are placed on the ground structure of the proposed antenna with complimentary split-ring resonator slots. The proposed metamaterial antenna describes that an increase in the series-capacitance value may degrade to the half-wave length resonating frequency which will reduce the electrical dimension of the proposing antenna. The TM01 mode will be propagated around the complimentary split-ring resonator slot on the ground plane. Findings: Split ring resonator structure in the ground plane is serving as metamaterial and the permittivity of the substrate came down to negative with the current model. Multiband behaviour of the antenna at corresponding frequencies shows the change in permittivity. Novelty/Improvement: Novel structure of SRR on the ground plane is behaving like defected ground structure in one way and responsible for multiband characteristics. The proposed antenna occupying the dimensions of 40 x 35 x 1.6 mm with hybridization of TM10 and TM01 mode. 
Keywords: Complimentary Split-Ring Resonator (CSRR), Metamaterial, Patch Antenna, Permittivity, Wideband