The application relates to the technical field of
phased array antennas, in particular to a flat plate type
phased array antenna which comprises a base, an angle adjusting mechanism arranged on the base, and a
phased array antenna body arranged on the angle adjusting mechanism, a rotating seat is rotatably arranged at the middle part of the base, an antenna mounting surface is rotatably arranged above the rotating seat, and the phased array antenna body is arranged above the antenna mounting surface; the angle adjusting mechanism comprises an
azimuth angle adjusting
assembly and a
pitch adjusting
assembly; a center wave-transparent area is arranged at the middle part of a
heat shield, and a
heat flow guiding
assembly is arranged on the periphery of the
heat shield. Compared with the prior art, the
heat flow guiding assembly is arranged, heat is transmitted through contact and
convection /
radiation coupling into the groove, then is diffused in the circumferential direction, is transmitted to the outer heat conduction plate in a directional manner, and is connected to an external radiator / fins / heat pipes / liquid cooling, etc. through the external connecting hole to realize multi-point heat dissipation and uniform temperature release, reduce local hot spots, thermal stress and maintenance replacement cost.