An analysis of slots loaded rectangular stacked microstrip antenna for multiband operations

This paper presents a slot loaded compact stacked multiband patch antenna. The designed antenna consists of two patches. The stacked patch is made on Bakelite substrate and feed patch is made on FR-4 substrate. The multiband behavior of antenna is due to stacked structure, loaded slots and notches on feed patch of the antenna. The designed antenna operates at resonating frequencies of 1.27 GHz, 1.72 GHz, 3.66 GHz, 4.7 GHz, 5.34 GHz, 5.88 GHz and 6.6 GHz with fractional bandwidth of 4.88%, 6.56%, 2.73%, 3.61%, 4.49%, 5.78% and 6.36% respectively, is suitable for mobile communication (1.2/1.7 GHz), WiMAX (3.5/4.8GHz), WLAN (5.2/5.8 GHz) and satellite communication (6.5 GHz). Experimental results show that the antenna gives good gains and radiation efficiencies over the operating bands. There is a good agreement between the measured and simulated results.