Quasi-air integrated waveguide, transition structure, array antenna and manufacturing method

The invention discloses a quasi-air integrated waveguide, a transition structure, an array antenna and a manufacturing method, the quasi-air integrated waveguide comprises a first metal conductive layer and a second metal conductive layer, and the second metal conductive layer is provided with a main channel along a first direction. A row of conductive connection structures which are arranged at intervals are respectively arranged along two sides of the main channel, and the first direction is the propagation direction of electromagnetic waves; the second metal conductive layer is in gapless conductive connection with the first metal conductive layer through the conductive connection structures arranged at intervals. According to the invention, the influence of tolerance errors caused by processing and assembling can be reduced, high engineering applicability is realized, and high-frequency application on the aspects of loss and power capacity is met. Especially when the working frequency is very high, the pr