Flexible Capacitively Loaded Antenna with Parylene Conformal Coating

A small planar flexible monopole antenna with a parylene-c coating is designed for wireless local area network and the ultra-wideband system applications. It is fabricated on a polyimide film and consists of a folded and meandered radiating strip fed by a microstrip line. A parallel plate capacitor loads the open end of the radiating strip to reduce its size. The antenna operates from 2.4 to 2.484 GHz and from 3.8 to 10.6 GHz. Far field radiation patterns under bent conditions are also presented.