A 16 ×16 -Element Single-Layer Full-Corporate-Fed SIW Slot Array Antenna

A single-layer corporate-fed substrate integrated waveguide slot array is newly proposed. Since every radiating slot is individually connected to one of the output ports of the corporate feeding circuit, the low-sidelobe antenna with a low profile can be easily realized without grating lobes. A $16 \times 16$ element slot array is designed by HFSS and is fabricated by the standard processes for the PCB and milling. Good agreement between the simulated and the measured directivity and radiation pattern has been observed. The aperture efficiency higher than 80% is achieved over the frequency ranging from 57 to 66 GHz. The antenna performance has been verified.