研究目的
To design a new dual-band dual-sense circularly polarized (CP) slot antenna with a U-shaped open-slot and a vertical grounded stub for dual-band dual-sense CP radiation.
研究成果
The proposed dual-band dual-sense CP slot antenna achieves good AR bandwidth and impedance matching in both RHCP and LHCP operations. It possesses a wider available 3-dB AR bandwidth and a simpler structure compared to previous designs, making it suitable for modern wireless communication systems.
研究不足
The study focuses on the design and performance of a specific antenna configuration. Potential areas for optimization include further miniaturization and enhancement of bandwidth and gain.
1：Experimental Design and Method Selection:
The antenna design involves a rectangle patch and a modified ground plane with a U-shaped open-slot and a vertical stub to achieve dual-sense CP performance. A bevel is cut on the patch for impedance matching. The antenna is fabricated on an FR4 substrate and fed by a CPW structure.
2：Sample Selection and Data Sources:
The antenna is simulated using Ansoft HFSS ver. 14 and a prototype is fabricated for experimental measurement.
3：List of Experimental Equipment and Materials:
FR4 substrate (εr = 4.4, loss tangent of 0.02, thickness h = 1 mm), 50-Ohm SMA connector, Wiltron 37269A vector network analyzer.
4：4, loss tangent of 02, thickness h = 1 mm), 50-Ohm SMA connector, Wiltron 37269A vector network analyzer.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The antenna is designed, simulated, fabricated, and then measured for return loss, axial ratio, and radiation patterns.
5：Data Analysis Methods:
The performance of the antenna is analyzed based on the measured return loss, axial ratio bandwidths, and radiation patterns.
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