High gain tri-band patch antenna using crossed-slot and complementary split ring resonator structure.

In this work, analysis of complementary split ring-based resonator (CSRR) structure and a crossed-slot structure are the main emphasis. The conventional patch antenna is designed to operate at 10.8GHz frequency and is tuned to operate at three resonant frequencies at 7.8 GHz (7.64 - 8.1GHz), 10.8 GHz (10.36 - 11.63GHz), and 18GHz (17.28 - 19.17GHz) which can be significantly useful for wireless applications. And the realized gain obtained at 7.8 GHz, 10.8 GHz, and 18GHz using High Frequency Structure Simulator (HFSS) is 3.17 dB, 6.25 dB, and 7.62 dB. The antenna is designed on a FR4 epoxy dielectric substrate with a relative permittivity of 4.4 and thickness of 1.6mm, and it is fed using an inset feeding approach. The outcome demonstrates that the size minimization can be accomplished through CSRR inclusion. [ABSTRACT FROM AUTHOR]