Design and Study of Planar Inverted-f Antenna for Mobile Devices Covering Lte/wlan Applications

A Planar Inverted-F Antenna for LTE2300 (2.3-2.4 GHz), WLAN (2.4-2.484 GHz), and LTE2500 (2.5-2.69 GHz) bands has been presented in this paper. The proposed structure has a dimension of 18 x 13 mm over the ground plane of size 100 x 50 mm which can easily be implanted in the small space available within the mobile device. The proposed structure is having an impedance bandwidth ranging from 2.16 GHz to 2.726 GHz covering all the desired frequency bands. The antenna has a resonating frequency at 2.395 GHz. For getting the impedance bandwidth we are taking -8 dB as the reference return loss. The VSWR, input impedance plot along with parametric study of some key parameters is presented. The radiation pattern and current density plots of the antenna at 2.4 GHz and 2.55 GHz are also presented. The peak realized gain of the proposed antenna varies from 4.17 dB to 4.84 dB in the desired operating band.