研究目的
Investigating a method to suppress higher order modes TE102 and TE201 in a substrate integrated waveguide (SIW) resonator feeding with in-line ports to improve selectivity without using orthogonal/angled ports or L-bend.
研究成果
The proposed method effectively suppresses TE102 and TE201 modes in SIW resonators with in-line ports, improving selectivity without the need for orthogonal/angled ports or L-bends, offering potential for more compact and efficient in-line transmission circuits.
研究不足
The technique requires precise adjustment of port offset and may need perturbation vias or cavity shape adjustments to equalize mode frequencies, potentially complicating design.
1：Experimental Design and Method Selection:
The study proposes a method to suppress TE102 and TE201 modes in SIW resonators by introducing TE201 to counteract TE102 through out-phase out-coupling. Two prototypes based on square and rectangular cavities were designed and measured.
2：Sample Selection and Data Sources:
Prototypes were fabricated on single-layer 0.508 mm Rogers RT/duroid 5880 substrate.
3：508 mm Rogers RT/duroid 5880 substrate.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Ansoft HFSS for design, Agilent N5227A (10 MHz to 67 GHz) and Anritsu test fixture SC5225 (DC to 60 GHz) for measurement.
4：Experimental Procedures and Operational Workflow:
Adjusting the offset of in-line ports to excite TE201 and counteract TE102, with perturbation vias or slight cavity adjustments to equalize mode frequencies.
5：Data Analysis Methods:
Comparison of simulated and measured S-parameters to verify mode suppression effectiveness.
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