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In this publication we present the survey on modern microwave waveguide polarization converters, reveal their design kinds, analyze operation principles and derive expressions of their transformation parameters. Nowadays, new polarizers are developed by scientists and engineers, but the transformation parameters are not unified. In this work we demonstrate two possible theoretical approaches of the decomposition of electromagnetic mode with any kind of polarization into two independent constitute waves obtaining orthogonal polarizations. After this, possible equivalent characteristics of polarization state analysis are discussed. The most commonly applied parameters are the ellipticity coefficient, level of cross polarization discrimination and phase shift between orthogonally polarized modes. Level of matching of polarization converter is estimated by standing wave factor by voltage or equivalently by reflection factor. It was established that there occurs the effect of dependence of matching effectiveness on polarization parameters of the electromagnetic mode at the output port of a waveguide polarization converter. Therefore, the phase shift between the orthogonal polarizations can’t be utilized as the only one parameter of the polarization purity of waveguide polarization converters. In order to improve and clarify the parameters of polarization, we introduced the magnitudes of transmitted modes into the analytical expressions for the ellipticity coefficient and discrimination of co- and cross-polarizations of the microwave polarization converters based on the guides. Found accurate theoretical expressions for polarization parameters can be applied for the designing of various modern microwave polarization converting devices including orthomode duplexers and waveguide polarization converters of communication systems and radar appliances, including orthomode duplexers and waveguide polarization converters of state-of-the-art satellite communication systems, terrestrial telecommunications and radio location appliances.

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Waveguide Polarization Converters and Their Transformation Characteristics

  • 会议论文

  • 发表日期：

    2025年

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  • Stepan Piltyay,
  • Andrew Bulashenko,
  • Anastasiia Shkinder,
  • Vladyslav Potapenko

摘要

In this publication we present the survey on modern microwave waveguide polarization converters, reveal their design kinds, analyze operation principles and derive expressions of their transformation parameters. Nowadays, new polarizers are developed by scientists and engineers, but the transformation parameters are not unified. In this work we demonstrate two possible theoretical approaches of the decomposition of electromagnetic mode with any kind of polarization into two independent constitute waves obtaining orthogonal polarizations. After this, possible equivalent characteristics of polarization state analysis are discussed. The most commonly applied parameters are the ellipticity coefficient, level of cross polarization discrimination and phase shift between orthogonally polarized modes. Level of matching of polarization converter is estimated by standing wave factor by voltage or equivalently by reflection factor. It was established that there occurs the effect of dependence of matching effectiveness on polarization parameters of the electromagnetic mode at the output port of a waveguide polarization converter. Therefore, the phase shift between the orthogonal polarizations can’t be utilized as the only one parameter of the polarization purity of waveguide polarization converters. In order to improve and clarify the parameters of polarization, we introduced the magnitudes of transmitted modes into the analytical expressions for the ellipticity coefficient and discrimination of co- and cross-polarizations of the microwave polarization converters based on the guides. Found accurate theoretical expressions for polarization parameters can be applied for the designing of various modern microwave polarization converting devices including orthomode duplexers and waveguide polarization converters of communication systems and radar appliances, including orthomode duplexers and waveguide polarization converters of state-of-the-art satellite communication systems, terrestrial telecommunications and radio location appliances.