Dual-circular polarized antenna system

A method of manufacturing an antenna array, the method comprising:

• forming a plurality of combiner sticks, wherein each of the plurality of combiner sticks comprises a linear array of ports arranged along a first dimension and coupled to a common port via a network of combiner/dividers, and wherein the plurality of combiner sticks are stacked along a second dimension such that the linear array of ports of the plurality of combiner sticks define a two-dimensional grid of ports;
• attaching a horn plate comprising an array of horn elements coupled to the plurality of combiner sticks, wherein each horn element of the array of horn elements includes a horn port coupled to a corresponding port of the two-dimensional grid of ports and further includes an aperture port;
• and
• attaching a grid plate coupled to the horn plate, the grid plate dividing the aperture port of each horn element into a corresponding plurality of apertures.