Ka wave band one-dimensional linear array system

The invention provides a Ka wave band one-dimensional linear array system. The Ka wave band one-dimensional linear array system comprises eight identical input-output module units, eight radiating antennas and a one-to-eight power divider. The eight identical input-output module units, the eight radiating antennas and the one-to-eight power divider are distributed in the longitudinal direction perpendicular to the plane of antenna apertures. Each input-output module unit is composed of a numerical control attenuator, a numerical control phase shifter, a driving amplifier, a power amplifier, a two-stage low-noise amplifier and three radio frequency switches. According to the Ka wave band one-dimensional linear array system, under the situation that the total synthesis power is not changed, the direct power consumption of all input-output modules can be reduced by increasing the number of total array elements and reducing the transmitting power of single array elements, the design difficulty of the input-output modules is lowered, and the cost of an antenna array is reduced.