Enhanced design of bowtie antennas over High-Impedance surfaces: An evolutionary approach

Abstract

This work presents optimization of printed wideband antennas that are backed by High Impedance surfaces using a hybrid of constrained Evolutionary Programming (EP) and a MoM based simulator, This approach is used to arrive at optimized designs for semiconformal bowtie antenna structures of about λ/10 thick with enhanced bandwidth performance, which are superior to previously reported structures. Two different designs are presented, where in each a bowtie antenna is used as radiating element and a mushroom-like EBG structure is used as its High Impedance ground-plane, with vias for one design, and without the vias for the other.

A High Gain and Directivity Bow Tie Antenna Based on Single-Negative Metamaterial

“…Metamaterials have been widely used in various fields such as various special antenna designs [6][7][8][9][10], optical imaging [11], electromagnetic wave stealth, subwavelength waveguide devices [12], leaky wave elements [13], and many others. The metamaterials loading on the antenna can result in antenna miniaturization, wide passband, high gain, and other functions.…”