研究目的
To design a miniaturized and circularly polarized inverted C-shaped patch antenna with defected ground structure for X and Ku bands applications, addressing the need for compactness and circular polarization in wireless communications to reduce polarization mismatch and multipath fading effects.
研究成果
The proposed miniaturized inverted C-shaped patch antenna with DGS successfully operates in the X and Ku bands (9.1-16 GHz) with a circular polarization range of 11.79-12.89 GHz, making it suitable for compact wireless applications like radar and satellite communications. The small size (15x10x1.524 mm3) is a key advantage, but further improvements in gain and bandwidth are recommended for broader applicability.
研究不足
The study is based solely on simulations without experimental validation. The gain is relatively low (maximum 3.23 dBi), and the axial ratio bandwidth is limited to 1.1 GHz, which may not cover all desired applications. Future work is needed to enhance gain and ARBW.
1：Experimental Design and Method Selection:
The antenna design involves an inverted C-shaped patch with a defected ground structure (DGS) to achieve circular polarization and miniaturization. The design was optimized through parametric studies and simulated using Computer Simulation Technology Microwave Studio (CST MWS) based on the finite integration technique (FIT).
2：Sample Selection and Data Sources:
The antenna is fabricated on a dielectric substrate RO4350B, with specific dimensions optimized as per Table 1 in the paper. No physical samples were mentioned; the study is based on simulations.
3：List of Experimental Equipment and Materials:
Dielectric substrate RO4350B with dielectric constant 3.48, loss tangent 0.0037, height 1.524 mm, and cladding thickness 0.017mm. Simulation software CST MWS was used.
4：48, loss tangent 0037, height 524 mm, and cladding thickness 017mm. Simulation software CST MWS was used.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The design process included creating different geometries (Ant.I to Ant.IV) with variations in patch and ground structures, simulating S11, gain, axial ratio, and radiation patterns to optimize performance.
5：Data Analysis Methods:
Simulated results for S11, realized gain, axial ratio, and radiation patterns were analyzed to determine impedance bandwidth, gain, and circular polarization characteristics.
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