A Compact Wideband Microstrip-Fed Patch Antenna Using a U-Shaped Parasitic Element

In this paper, a compact broadband micristrip-fed patch antenna is proposed. A U-shaped parasitic strip is incorporated into the side of the rectangular patch to induce a new frequency point. The resonant frequency point can be adjusted by modifying the position and the length of the parasitic strip so as to achieve a wide bandwidth. Simulation results indicates that the proposed antenna provides an impedance bandwidth of 10.3% at 4.85GHz center frequency while keeps a low profile property of about 0.025 free-space wavelength.