A dual-polarized antenna comprising: a plurality of unit cells (320-a-1...320-a-n), each unit cell comprising: a first common waveguide associated with a first polarization; a second common waveguide associated with a second polarization; a two-by-two array of antenna elements, each antenna element comprising a polarizer coupled between an individual waveguide and first and second divided waveguides (210, 215) associated with the first and second polarizations, respectively, wherein a cross-section of the individual waveguides of the two-by-two array defines a unit cell boundary for each unit cell; a first waveguide network comprising at least one waveguide combiner/divider and connecting each of the first divided waveguides of the two-by-two array of antenna elements with the first common waveguide via a continuous waveguide signal path; and a second waveguide network comprising at least one waveguide combiner/divider and connecting each of the second divided waveguides of the two-by-two array of antenna elements with the second common waveguide via a continuous waveguide signal path, wherein the first waveguide network and the second waveguide network are each entirely within a projection of the unit cell boundary along a direction that is normal to the cross-section that defines the unit cell boundary, wherein the dual-polarized antenna comprises a layered assembly comprising the plurality of unit cells, the layered assembly comprising a plurality of layers oriented orthogonal to the cross-section that defines the unit cell boundary. a plurality of unit cells (320-a-1...320-a-n), each unit cell comprising: a first common waveguide associated with a first polarization; a second common waveguide associated with a second polarization; a two-by-two array of antenna elements, each antenna element comprising a polarizer coupled between an individual waveguide and first and second divided waveguides (210, 215) associated with the first and second polarizations, respectively, wherein a cross-section of the individual waveguides of the two-by-two array defines a unit cell boundary for each unit cell; a first waveguide network comprising at least one waveguide combiner/divider and connecting each of the first divided waveguides of the two-by-two array of antenna elements with the first common waveguide via a continuous waveguide signal path; and a second waveguide network comprising at least one waveguide combiner/divider and connecting each of the second divided waveguides of the two-by-two array of antenna elements with the second common waveguide via a continuous waveguide signal path, a first common waveguide associated with a first polarization; a second common waveguide associated with a second polarization; a two-by-two array of antenna elements, each antenna element comprising a polarizer coupled between an individual waveguide and first and second divided waveguides (210, 215) associated with the first and second polarizations, respectively, wherein a cross-section of the individual waveguides of the two-by-two array defines a unit cell boundary for each unit cell; a first waveguide network comprising at least one waveguide combiner/divider and connecting each of the first divided waveguides of the two-by-two array of antenna elements with the first common waveguide via a continuous waveguide signal path; and a second waveguide network comprising at least one waveguide combiner/divider and connecting each of the second divided waveguides of the two-by-two array of antenna elements with the second common waveguide via a continuous waveguide signal path, wherein the first waveguide network and the second waveguide network are each entirely within a projection of the unit cell boundary along a direction that is normal to the cross-section that defines the unit cell boundary, wherein the dual-polarized antenna comprises a layered assembly comprising the plurality of unit cells, the layered assembly comprising a plurality of layers oriented orthogonal to the cross-section that defines the unit cell boundary.