A Wideband Design of Microstrip Patch Antenna Loaded with Metal Ring Superstrate

A compact, as well as wideband design of a strip-fed microstrip patch antenna (MPA) is presented for X-band operations. A metal-ring superstrate is being used to load a conventional MPA for the enhancement of impedance bandwidth from 6% to 25%. More than 9 dBi peak-gain is revealed from a compact antenna (~λ×λ) over the wide operating band. Experimental validation is performed with a set of antenna prototype fabricated using the laboratory facility. Measured results are very close to the simulated predictions. Experimental data confirm about 29% matching bandwidth which is much improved compared to the simulated prediction.