A waveguide device, comprising: a first circular waveguide configured to implement a 3λ/8 relative phase shift between transmission of two orthogonal linear polarized signals transmitted at a first polarization orientation; a second circular waveguide configured to impart a λ/8 relative phase shift between transmission of two orthogonal linear polarized signals transmitted at a second polarization orientation, the second circular waveguide coaxially adjacent to the first circular waveguide along an axis to form a waveguide assembly, the waveguide device further comprising a radiation source configured to provide dual linear polarized energy, having a source polarization orientation, into the waveguide assembly; wherein the 3λ/8 phase shift is implemented in the first circular waveguide with a first phase shift device that lies within a first plane, the first plane intersects the axis and opposing interior walls of the first waveguide, the first plane is disposed in the first polarization orientation, and the λ/8 phase shift is implemented in the second circular waveguide with a second phase shift device that lies within a second plane, the second plane intersects the axis and opposing interior walls of the second waveguide, the second plane is disposed in the second polarization orientation; for a first operational mode of the waveguide assembly, the first circular waveguide is rotationally orientated about the axis with respect to the second circular waveguide such that the first polarization orientation is offset by 90 degrees with respect to the second polarization orientation, the radiation source arranged such that the source polarization orientation is 45 degrees with respect to the first polarization orientation and the second polarization orientation; and for a second operational mode of the waveguide assembly, the first circular waveguide is rotationally orientated about the axis with respect to the second circular waveguide such that the first polarization orientation and the second polarization orientation are substantially the same. a first circular waveguide configured to implement a 3λ/8 relative phase shift between transmission of two orthogonal linear polarized signals transmitted at a first polarization orientation; a second circular waveguide configured to impart a λ/8 relative phase shift between transmission of two orthogonal linear polarized signals transmitted at a second polarization orientation, the second circular waveguide coaxially adjacent to the first circular waveguide along an axis to form a waveguide assembly, the waveguide device further comprising a radiation source configured to provide dual linear polarized energy, having a source polarization orientation, into the waveguide assembly; wherein the 3λ/8 phase shift is implemented in the first circular waveguide with a first phase shift device that lies within a first plane, the first plane intersects the axis and opposing interior walls of the first waveguide, the first plane is disposed in the first polarization orientation, and the λ/8 phase shift is implemented in the second circular waveguide with a second phase shift device that lies within a second plane, the second plane intersects the axis and opposing interior walls of the second waveguide, the second plane is disposed in the second polarization orientation; for a first operational mode of the waveguide assembly, the first circular waveguide is rotationally orientated about the axis with respect to the second circular waveguide such that the first polarization orientation is offset by 90 degrees with respect to the second polarization orientation, the radiation source arranged such that the source polarization orientation is 45 degrees with respect to the first polarization orientation and the second polarization orientation; and for a second operational mode of the waveguide assembly, the first circular waveguide is rotationally orientated about the axis with respect to the second circular waveguide such that the first polarization orientation and the second polarization orientation are substantially the same.