A novel aperture coupled microstrip antenna array with low cross-polarization, low sidelobe and backlobe

An aperture coupled microstrip antenna array with low cross-polarization, low sidelobe and backlobe is presented in the paper. The low cross-polarization (-35.1 dB) and low back radiation are achieved by using aperture-coupled configuration with the reflector ground. A good match feed network design enables the good bandwidth and low sidelobe lever (-20.9dB).