A compact beam steering planar array with broadband and high gain

A broadband beam steering continuous transverse stub planar array fed by the parabolic reflector of substrate integrated waveguide (SIW) is proposed in this paper. The beam steering function could be realized by mechanically moving the H-plane SIW horn straightly along the direction of the stub. A 16-element array is simulated to validate the design. The simulation results show that the relative bandwidth of the reflection coefficient less than ™10dB is 16.6% (12.18GHz-14.34GHz) with the center frequency of 13.0GHz. The gain at the broadside is 27.94dB with the first sidelobe level of ™22.8dB and the 3dB beam width of 7.2°. Within the scanning angle of ±33° range, the gain decrease less than 3dB. This beam steering array has the good feature of broadband, high gain, simple and compact structure, and low cost. It could be applied in Ku band and millimeter wave bands.