Embodiments of the invention include an integrated single-piece antenna feed and a turnstile circular polarizer suitable for use in a satellite communications system. One embodiment of the integrated single-piece antenna includes a circular waveguide input, a turnstile, a coaxial feed horn, subreflector and subreflector support. Alternative embodiments utilize symmetrically oriented struts with or without a coaxial subreflector support to physically support a subreflector.