Flexible zeroth-order resonant antenna independent of substrate deformation

摘要

A novel flexible zeroth-order resonant (ZOR) antenna is proposed. Its zero phase constant ensures that the antenna performance is independent of substrate deformation. A composite right/left-handed transmission line is designed based on coplanar waveguide technology to realise the zeroth-order resonance phenomenon. This provides good performance: reasonable bandwidth (6.5%) and peak gain (0.69¿1.39 dBi). Simulated and measured results show that the antenna¿s resonant frequencies and radiation patterns are almost unchanged at different curvature diameters of 30, 50, 70 mm, as well as for a flat surface. It is belived that this is the first reported ZOR antenna on a flexible substrate.