A structure and design of novel compact UWB slot antenna

A structure and design optimization procedure of a compact UWB slot antenna is presented. Small size of the antenna and its good electrical performance is achieved by introducing sufficiently large number of geometry degrees of freedom, including a stepped-impedance feed line and a meandered slot with parameterized dimensions. All dimensions are simultaneously adjusted using automated EM-simulation-driven optimization algorithm. Exploitation of variable-fidelity models allows us to maintain low computational cost of the design process. The footprint of the optimized antenna is only 8.93 mm × 17.9 mm (160 mm2) while maintaining low reflection in the entire UWB frequency range.