Substrate integrated wave-guide antenna

The invention discloses a substrate integrated wave-guide antenna. The substrate integrated wave-guide antenna is capable of meeting broadband working needs and realizing high efficiency. The substrate integrated wave-guide antenna comprises an antenna unit layer, a feed network layer and a plane wave excitation layer, the plane wave excitation layer generates quasi-plane wave, the quasi-plane wave is coupled to the feed network layer through a gap in a copper coating of the upper surface of the plane wave excitation layer, the feed network layer distributes power of the quasi-plane wave, the power is coupled to the antenna unit layer through a gap in a copper coating of the upper surface of the feed network layer, and a gap in a copper coating of the upper surface of the antenna unit layer radiates electromagnetic wave to a free space.