研究目的
To introduce a planar orthomode transducer (OMT) using substrate integrated waveguides (SIWs) and substrate integrated coaxial lines (SICLs) that is entirely contained within two substrate layers, offering a smaller, lighter, and simpler construction with improved isolation and loss properties.
研究成果
The proposed planar OMT in mixed SIW/SICL technology achieves excellent wideband performance, high isolation, and polarization purity, surpassing the standard WR 90 X band rectangular waveguide's recommended frequency range. It offers a compact, lightweight solution with simpler construction compared to traditional waveguide OMTs.
研究不足
The design's performance is limited by the substrate's dielectric losses and the complexity of integrating multiple planar components within a compact space.
1：Experimental Design and Method Selection:
The OMT is designed using SIWs and SICLs within two substrate layers, featuring a quadruplet of probes inside the metal waveguide with fully symmetrical geometry. A new wideband inline SICL to SIW transition was developed.
2：Sample Selection and Data Sources:
The design is implemented on RO4003CTM substrate, chosen for its fabrication properties.
3：List of Experimental Equipment and Materials:
Rogers Corporation RO4003C substrate, metal waveguide, SICLs, SIWs.
4：Experimental Procedures and Operational Workflow:
The OMT's performance was simulated in CST Microwave Studio, modeling line walls with vias, lossy RO4003C dielectric, and lossy copper metallization.
5：Data Analysis Methods:
The S-parameters were calculated to evaluate return loss, insertion loss, inter-port isolation, and cross-polarization discrimination.
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