The invention proposes a divided sub-array feed VICTS
satellite communication antenna, and aims to provide a low-profile high-
gain satellite communication antenna with a
wide beam scanning angle and a strong
radiation capability. The invention is achieved by the following technical scheme: air long slots equally spaced along a radial direction according to a
linear array string are made in the surface of an upper
metal rotary table, the bottom of a separator of each air long slot is provided with an air gap blind slot for
impedance matching,
waveguide cavities arranged symmetrically to the
diameter axis are made on the lower bottom of the lower
metal circular disc, which corresponds to the upper
metal rotary table, each
waveguide cavity serves as a
feed network for an antenna sub-array through a
feed line source of the inner wall thereof, a quasi-TEM wave traveling from the left to the right with an approximately equal amplitude and the same phase at a feed end is generated from the left end of each cavity, the quasi-TEM wave
electric field flows into each air long slot from each of the
waveguide cavities, and the upper metal rotary table uses each air long slot as a
radiation sub-array unit, combines the
radiation unit sub-arrays into a
large array for radiating an antenna into a natural space, and radiates the antenna into the natural space.