Conceptual and practical realization of reduced size multi-band circular microstrip patch antenna loaded with MNG metamaterial

In this paper, an MNG metamaterial loaded circular microstrip patch antenna has been reported. This antenna not only shows multi-band performance but also provides maximum possible size reduction (35%) with realizable gain performance. Achieving triple band performance was made possible by modifying TM_δ10(0<;_δ<;1) mode (using μ-negative metamaterial) along with TM₂₁₀ mode modification with symmetrical slots. At first, simulation performance of this antenna on the basis of proper design algorithm [1] has been shown. Later, with appropriate choice of parameters, a practical modeling of MNG metamaterial using helices that can be used to fabricate this sort antenna, has been demonstrated for verification. In [2] three helices were used to fabricate MNG metamaterial, but here it is shown that one helix provides better directivity instead of three. This will certainly minimize fabrication complexity in MNG metamaterial.