A Compact Multiband FICA Antenna with Coupled-Fed Mechanism for Smartphone Applications

A novel coupled-fed Folded Inverted Conformal Antenna (FICA) with compact size for smartphone application is presented in this paper. The proposed antenna is mounted at the bottom side of the PCB, which consists of a closed slot., a T-shaped driven branch for the coupled-fed, a shorting pin, and an impedance matching network. Three resonant modes have been generated to cover the lower band from 824 to 960 MHz and upper band from 1.71 to 2.82 GHz. In addition, both of the clearance and height of the proposed antenna are only 4 mm, which makes the antenna very compact, low-profile and suitable for the narrow frame smartphone applications.