Planar Low-Profile 2-D Wide-Angle Scanning Phased Array in X-Band Based on SIW

In this paper, a planar low-profile 2-D wide-angle scanning phased array in X-Band based on substrate integrated waveguide (SIW) is proposed. The unit cell is composed of the radiation patch, SIW cavity, and metal via holes. The SIW cavity and metallized via holes are utilized to suppress surface waves in order to broaden the coverage of beam scanning. A
$5\times 5$
(25 elements) phased array is designed, and all of the simulation results are completed by the software HFSS, which reveal that the proposed phased array can achieve a wide-angle scanning capability from -60° to 60° for both E-plane and H-plane in the whole operating band (8.15-8.4GHz).