The embodiment of the invention relates to the technical field of communication, and discloses a
radar antenna and an automobile intelligent driving
system.The
radar antenna comprises a substrate, an
electromagnetic band gap structure layer, a
ridge waveguide transmission structure and an
antenna radiation layer, the
electromagnetic band gap structure layer is provided with a pin unit, and the pin unit forms an
electromagnetic shielding area; the
ridge waveguide transmission structure is arranged in the
electromagnetic band gap structure layer, one end of the
ridge waveguide transmission structure is connected with a
chip interface, the other end of the ridge waveguide transmission structure is connected with the
antenna radiation layer, and the
antenna radiation layer comprises a plurality of slot antennas arranged in the longitudinal direction and a plurality of
choke groove assemblies. One
choke groove
assembly is adjacent to one
slot antenna, and the electromagnetic
band gap structure layer is connected with the antenna
radiation layer to form a gap waveguide
transmission channel. By means of the mode, electromagnetic connection between the
layers can be achieved without a
welding process, and the influence of
welding quality difference on the antenna performance is avoided.