研究目的
Design and manufacturing of a K-band reconfigurable phase shifter completely implemented in waveguide technology for reduced insertion loss, good matching, and large phase shifting range.
研究成果
The reconfigurable phase shifter presented in this work, fully implemented in waveguide technology, shows great potential for high-power beam steering phased arrays. The comparison of different manufacturing techniques highlights the strengths and weaknesses of each, with CNC and DMLS prototypes showing lower insertion losses and the FFF prototype offering a low-cost alternative for fast prototyping.
研究不足
The manual adjustment of tuning screws introduces some error, and the FFF prototype has higher insertion losses due to the low electrical conductivity of the metallic paint.
1：Experimental Design and Method Selection:
The phase shifter is based on the reflection-type configuration, combining a short slot coupler and two tunable reactive loads. The reconfiguration capability is obtained by means of a pair of adjustable metallic posts.
2：Sample Selection and Data Sources:
Three prototypes were manufactured using different techniques (CNC machining, FFF, and DMLS) to assess performance for different applications.
3：List of Experimental Equipment and Materials:
Conventional aluminium CNC machining, a low-cost fused filament fabrication technique, and direct metal laser sintering were used.
4：Experimental Procedures and Operational Workflow:
The prototypes were characterized experimentally at K-band, and the results were compared to evaluate the strengths and weaknesses of each manufacturing technique.
5：Data Analysis Methods:
The scattering parameters of the prototypes were measured and compared with simulated results to assess performance.
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