Stacked rectangular ring slot microstrip antenna with parasitic load for UMTS, LTE and WiFi applications

This paper proposes a new design of stacked rectangular ring slot microstrip antenna using parasitic load with slits and fed by coplanar waveguide. The measurement results shown return loss of -14,94 dB with VSWR 1,44 at frequency 2100 MHz for UMTS, at frequency 2300 MHz for LTE produce return loss -21,21 dB with VSWR 1,19 and return loss of -21,81 dB with VSWR 1,18 at frequency 2400 MHz for WiFi application.