研究目的
To present the design and fabrication of a low-loss, -weight, and -cost modified Butler matrix in groove gap waveguide technology at W-band, implemented by additive manufacturing, for use in narrowband radar applications.
研究成果
The study successfully demonstrates the feasibility of using additive manufacturing for creating a modified Butler matrix in groove gap waveguide technology at W-band. The prototype meets the desired conditions for both input ports within a narrow bandwidth, with acceptable amplitude and phase imbalances. The technology offers significant advantages in terms of cost, weight, and ease of assembly.
研究不足
The narrow bandwidth of 0.7% is due to the asymmetry in the design, leading to differences in path lengths between input and output ports. The phase balance degrades rapidly when separated from the design frequency of 94 GHz.
1：Experimental Design and Method Selection:
The design involves the use of groove gap waveguide technology and additive manufacturing to create a modified Butler matrix. The methodology includes simulations and measurements of individual components and the full matrix.
2：Sample Selection and Data Sources:
The study uses prototypes of the modified Butler matrix and its components, fabricated using stereolithography (SLA) and coated with copper.
3：List of Experimental Equipment and Materials:
Equipment includes a 3-D printer for SLA, copper for metallization, and measurement tools like the MS4647 VNA Anritsu and 3743A Anritsu mmW Module.
4：Experimental Procedures and Operational Workflow:
The process involves designing, simulating, fabricating, and measuring the components and the full modified Butler matrix to assess performance.
5：Data Analysis Methods:
Performance is evaluated based on S-parameters, amplitude and phase imbalance, and bandwidth.
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