Millimeter-wave open ended SIW antenna with wide beam coverage

In this paper, a mm-wave open ended SIW antenna on the edge of a multilayer PCB is demonstrated. The designed antenna features 180° and 90° 3dB beamwidth in E- and H-planes, respectively, covering one quarter of the entire space. The antenna is designed compatible with traditional PCB fabrication. Through vias are used as a mean to convert microstrip mode to SIW cavity mode. V-shaped notches are cut on top and bottom walls of the SIW to reduce the performance sensitivity to the PCB edge tolerance. Measurement shows the antenna features 3.9GHz bandwidth centered at 28GHz.