CPW-fed compact flexible antenna based on a zeroth-order resonator

This paper proposes a flexible antenna based on a zeroth-order resonator. The flexible antenna is fabricated on liquid crystal polymer substrate with a thickness of 100 um. The antenna operates at 3.18 GHz as zeroth-order mode and its size is 30mm * 30 mm. The return losses of the proposed antenna are almost invariant while it is bent from −90 degree to +90 degree.