ANTENNA FOR LTE/WWAN SMARTPHONE APPLICATION

Abstract

In this paper, an antenna with single open slot is designed with long term evolution (LTE)/wireless wide area network (WWAN) operation for smart-phone applications and simulated using Ansys High frequency structure simulator (HFSS). The operating frequency ranges of LTE/WWAN are 698-960 MHz and 1710-2690 MHz. The designed antenna is suitable for mobile devices with reduced size and narrow opening which operates in 1/4 wavelength resonant mode. The planar ground size of the proposed antenna is 140×75 mm². The substrate material used is FR4 epoxy which has a thickness of 1.6mm. The narrow open slot is made in the ground plane of the size 66×2 mm² and excited by the feeding line. L shape metallic plate for good impedance matching and series capacitor for bandwidth enhancement are added to theantenna design. From the simulation of the single open-slot antenna without Partial Ground Structure (PGS), it is observed that the antenna cannot achieve LTE/WWAN bands. To enhance the bandwidth, PGS is added to the antenna design, so that it can cover the dual operating frequency of LTE/WWAN bands. The return loss isachieved below -10dB. The current distribution is also within the antenna design area and the leakage of current is reduced.