Abstract
A polarizer for mm-wave antenna measurements based on standard rectangular waveguide technology is presented. The polarizer features a compact design and exhibits full band coverage with an excellent return loss |S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> | ≤ -20 dB and a transmission coefficient |S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</sub> | ≥ -2 dB. Furthermore, it has identical amplitude and phase responses in both the horizontal and vertical polarization states. This unique property enables accurate measurements in applications, which require dual-polarized signal acquisition such as near-field antenna or polarimetric radar cross section (RCS) measurements. Measurement results of a manually rotated prototype operating in the D-band (110-170 GHz) are shown. The design can be scaled to even higher mm-wave bands.
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