Stacked shorted microstrip antenna for low cross polarization and wide-band

A novel structure to improve the cross‐polarization characteristics of the shorted square microstrip antenna is presented. The square‐ring patch is used as a parasitic element in the stacked position to tune the input impedance, resonant frequency, cross polarization, and bandwidth of the shorted square microstrip antenna. As a result, 11% bandwidth and better than −14.5 dB cross‐polarization levels have been achieved. The theoretical results are compared with the experimental results. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 73–75, 20.