研究目的
To design a circularly polarized dielectric resonator antenna with wide bandwidth and low axial ratio values for applications such as satellite communications.
研究成果
The proposed CP DRA achieves wide bandwidth and low axial ratio values through a novel stacked structure with three closely coupled CP modes. The design is validated with a 2×2 sub-array prototype, showing good performance for Ku-band satellite applications, with potential for high throughput systems.
研究不足
The design may be complex due to the stacked structure and precise tuning required. The use of specific materials (e.g., Rogers laminates and ceramic) could limit cost-effectiveness or applicability in other frequency bands. The cavity-backed design increases size and may not be suitable for all array configurations.
1：Experimental Design and Method Selection:
The antenna design involves a stacked DRA structure with high permittivity dielectric strips on a low permittivity substrate, fed by an SIW coupling slot. A step-by-step design process is used, including tuning parameters for CP performance and impedance matching. Simulation is performed using ANSYS HFSS.
2：Sample Selection and Data Sources:
A prototype antenna sub-array is fabricated and measured. Materials include Rogers 4003C laminates and ceramic dielectric strips.
3：List of Experimental Equipment and Materials:
Rogers 4003C laminates (εr=3.38, tanδ=0.0027), ceramic material (εr=20.5, tanδ=1.4×10^-4), aluminum for cavity, screws for assembly.
4：38, tanδ=0027), ceramic material (εr=5, tanδ=4×10^-4), aluminum for cavity, screws for assembly.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The antenna is designed, simulated, fabricated, and then measured for reflection coefficients, axial ratio, gain, and radiation patterns using appropriate test equipment.
5：Data Analysis Methods:
Simulated and measured data are compared to validate the design. Performance metrics include impedance bandwidth, AR bandwidth, gain, and radiation efficiency.
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