The Waveguide Slot Array Antenna Using Non Resonant Mode To Improve Grating Lobes

There is a slot antenna of the rectangular waveguide as automotive collision avoidance millimeter-wave radar. Are provided a slot antenna to a wide wall, grating Hollow same amplitude as main polarization - Bed occurs. As 38 (GHz) millimeter wave waveguide antenna to be used in, to design the antenna optimized anew the length of slot.