Smart Compact-Folded Microstrip Antenna for GSM, LTE, and WLAN Applications

Abstract

A smart compact-folded microstrip antenna is proposed for Global System for Mobile (GSM) communication, Long-Term Evolution (LTE), and wireless LAN (WLAN) applications. The proposed antenna has two asymmetric L-shaped-folded arm designed using microstrip lines, which are fed by a 50 Ω coplanar waveguide (CPW) lines. The radiation characteristics of the antenna is designed to cover many applications such as GSM (900/1800 MHz), LTE (1900/2100/2300/2500 MHz), and WLAN (2450 MHz). As per the simulation results, the impedance bandwidth (IBW) (S11 < −10 dB) of proposed antenna is wide, i.e., 38% at higher band (1700–2500 MHz) and 12% at lower band (850–960 MHz) with an average gain of around 2–3 dBi in these bands. The designed single-feed antenna is low profile, small size (49 × 39 × 1.5 mm3) implemented using FR4 substrate, which is easily integrable with other communication devices.