A Compact Multiple Patch Slotted MICROSTRIP Patch Antenna for Wi-Max Application

A new and improved approach for the design of a compact multi-element patch antenna which works in pent band is proposed. Antenna comprises of a main patch with sub patches containing resonating slots. Main patch is fed with a 50Ω microstrip line and proposed antenna operates with multiple operational frequencies covering the bands from 2 GHz to 6 GHz with good impedance matching. Proposed design is verified using simulation software ANSOFT HFSS and tested using the laboratory experimental approach that looks like the simulated output with omnidirectional radiation characteristics. The antenna consists of a main radiator patch, defected ground plane and four slotted sub patches to generate five frequency bands, at 2.55, 3.60, 4.00, 4.85 and 5.60. These frequency bands are respectively 150, 100, 110, 140 and 80 MHz wide. For verification of simulation results, both designs are fabricated and the prototypes are measured. MSA is fabricated with substrate FR4 and overall dimension of 50×50×1.57mm3.