研究目的
To propose a 2 × 3 substrate integrated waveguide (SIW) H-plane hybrid coupler operating at 28 GHz with constant phase shifting outputs for application in beamforming networks and radar systems.
研究成果
The proposed SIW H-plane 2 × 3 hybrid coupler achieves good impedance matching, high isolation, and equal power division with constant phase shifting outputs, making it suitable for beamforming networks and radar systems.
研究不足
The design's performance is evaluated within a 5% relative bandwidth, and the phase difference deviation is less than ±20? within the frequency band 27.3–28.7 GHz.
1：Experimental Design and Method Selection:
The design involves a six-port network diagram and SIW six-port directional coupler configuration, utilizing narrow wall slot coupling and symmetrical equal-length unequal-width phase shifter.
2：Sample Selection and Data Sources:
The design is simulated and optimized via ANSYS Electromagnetics suit
3：0 and fabricated with a single-layer PCB. List of Experimental Equipment and Materials:
Rogers RT/duroid RO6002 with thickness of
4：508 mm is used for fabrication. Experimental Procedures and Operational Workflow:
The coupler's performance is evaluated through simulation and measurement of S-parameters and phase differences.
5：Data Analysis Methods:
The S-matrix of the six-port directional coupler is derived and analyzed to ensure lossless condition and desired phase relationships.
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