Patent ID: 8487826

Claim:
An antenna extending in a signal propagation direction, comprising: an input aperture; a first output port comprising first and second linear polarity pickups spaced apart from the input aperture in the signal propagation direction; a second output port spaced apart from the first output port in the signal propagation direction; a wave guide having an internal surface extending in the signal propagation direction from the input aperture to the second output port configured to transmit a propagating electromagnetic signal along the internal surface; the internal surface of the wave guide defining a first transition section extending from the input aperture to the first output port comprising a phase adjustment structure including at least one ridge extending in the signal propagation direction aligned with the first linear polarity pickup; the internal surface of the wave guide further defining a second transition section extending from the first output port to the second output port; wherein the internal surface of the wave guide is configured to simultaneously receive a linear polarity signal and a circular polarity at the input aperture, deliver the linear polarity signal to the first output port, polarize the circular polarity signal into linear components, and deliver the linear components of the circular polarity signal to the second output port.