E-band miniature plate antenna and simultaneous cofrequency diplexer composed of same E-band miniature plat antenna

The invention provides an E-band miniature plate antenna and a simultaneous cofrequency diplexer composed of the same E-band miniature plate antenna. In the E-band miniature plate antenna, four small radiation units are rectangularly arranged and installed on a large radiation unit at an equal interval, and the large radiation unit is connected with a feed waveguide through a coupling slit. Two E-band miniature plate antennas serve as an emission antenna and a reception antenna, and are parallelly integrated inside the simultaneous cofrequency diplexer. The polarization forms of the emission antenna and the reception antenna are orthogonal. The antenna adopts the miniature plate antenna which is easy to integrate, and the system complexity is not increased. The duplex system improves the system integrated level, reduces the system composition complexity, and effectively improves the utilization rate of frequency spectrum resources of the system.