研究目的
Design a broadband high gain planar meta-material based Resonant Cavity Antenna (RCA) operating at C-band for applications such as communication systems, focusing on achieving high gain and wide bandwidth using metamaterial-inspired superstrates.
研究成果
The proposed RCA achieves a high gain of 22.4 dBi and a wide impedance bandwidth of 72.72% (4 to 9.1 GHz), demonstrating significant improvement over the reference CDRA. The metamaterial superstrate effectively enhances directivity and bandwidth, making it suitable for C-band communication applications. Future work could focus on reducing bulkiness and extending the design to other frequency bands.
研究不足
The use of multiple superstrate layers increases the antenna profile, making it bulky. The design is optimized for C-band, and performance may vary at other frequencies. Fabrication and measurement may introduce minor discrepancies, such as frequency shifts.
1：Experimental Design and Method Selection:
The RCA is designed using a simple ray tracing method and full-wave electromagnetic simulation with ANSYS HFSS. The metamaterial unit cell is characterized using equivalent circuit modeling in Keysight ADS and the Nicolson-Ross-Weir (NRW) method for parameter extraction.
2：Sample Selection and Data Sources:
A cylindrical dielectric resonator antenna (CDRA) made from Ecco-stocks HIK material is used as the feed source. The superstrate is fabricated using a low-loss dielectric substrate with specific dimensions.
3：List of Experimental Equipment and Materials:
Equipment includes ANSYS HFSS v17.0 for simulation, Keysight ADS for circuit simulation, and fabrication tools for prototyping. Materials include Ecco-stocks HIK dielectric, epoxy substrate (εr=4.4, tanδ=0.002, thickness 1.6mm), copper for ground plane, and polymer stands.
4：0 for simulation, Keysight ADS for circuit simulation, and fabrication tools for prototyping. Materials include Ecco-stocks HIK dielectric, epoxy substrate (εr=4, tanδ=002, thickness 6mm), copper for ground plane, and polymer stands.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Design the CDRA and metamaterial unit cell; simulate reflection phase and S-parameters; fabricate a prototype with 2 layers of 4x4 array superstrate; measure S11, gain, and radiation patterns using appropriate test setups.
5：Data Analysis Methods:
Analyze impedance matching, radiation patterns, and gain from simulation and measured data; use statistical comparison to validate results.
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