Abstract: A Ka band wide-band and wide-angle scanning planar phased array polarized +45° is presented. Based on the principle of electromagnetic image, a +45° polarized wide beam-width element with embedded artificial magnetic conductor (AMC) is designed firstly. The relative bandwidth of the proposed element reaches 18.2% and the 3 dB beam width of its H-plane reaches 114°. Then a 4×16 uniform planar array composed of the above elements is proposed, and its wide-angle scanning properties are studied. The calculated results show that the proposed planar array can scan its main beam from -80° to +80° in the horizontal azimuth plane and from -20°to +30°in the vertical azimuth plane.