Polarizer for parallel plate waveguides

A method for manufacturing a parallel plate waveguide, PPW arrangement configured to alter a polarization state of a radio frequency waveform having a center frequency and a bandwidth, the method comprising:

• producing a first sheet;
• and
• a second sheet arranged in parallel with the first sheet in direction of a normal vector of the first sheet, wherein
• the second sheet is spaced apart from the first sheet by an inner-sheet spacing therein forming an unfilled space between the first sheet and the second sheet,
• the first sheet comprises a first electrically conductive pattern forming a first periodic structure of unit-cells in an extension direction, wherein the first periodic structure is associated with a height measured orthogonally to the extension direction and orthogonally to the local normal vector of the first sheet, where each unit-cell of the first periodic structure of unit-cells comprises an aperture configured to transmit the radio frequency waveform at a pre-determined polarization state,
• the second sheet comprises a second electrically conductive pattern forming a second period structure of unit-cells in the extension direction, wherein the second periodic structure is associated with the height, where each unit-cell of the second periodic structure of unit-cells comprises an aperture configured to transmit the radio frequency waveform at the pre-determined polarization state,
• the height is determined in dependence of the center frequency and/or the bandwidth of the radio frequency waveform such that the pre-determined polarization state is provided as well as matching between the PPW and a transmission medium of the radio frequency waveform, and
• integrating the first sheet and the second sheet at a peripheral edge of the PPW.