Performance Assessment of an Orthomode Transducer Under High Power Handling and Harsh Temperature Exposure

In the context of assessing radio frequency devices under harsh operating conditions, we present this study as a basic part of qualification package of critical communication systems. The study considers a ka–band, (29 - 31) GHz, circularly polarized septum-based orthomode transducer (OMT). The tough conditions embrace both high power handling and extreme environmental circumstances. The thermal expansion causes a clear deviation on the OMT parameters including common port axial ratio and impedance matching.