研究目的
To design a perpendicular-corporate feed for a four-layer circularly-polarized parallel-plate slot array antenna to achieve wideband characteristics and high efficiency in the 60 GHz band.
研究成果
The proposed perpendicular-corporate feed design successfully achieves a four-layer circularly-polarized parallel-plate slot array antenna with an 11.9% bandwidth for axial ratios below 3 dB and a realized gain of 32.7 dBi with 75.5% efficiency at the design frequency. The use of a dielectric layer and air gaps enables wideband characteristics and uniform excitation, though fabrication errors lead to some performance degradation. Future work should address these fabrication issues to improve accuracy.
研究不足
Fabrication constraints such as the need for dielectric layer thickness in multiples of 0.127 mm, potential bending of the dielectric layer, over-etching of slots, and errors in coupling apertures and feeding circuit that cause discrepancies between simulated and measured results. The antenna efficiency and bandwidth are affected by these issues.
1：Experimental Design and Method Selection:
The design involves a four-layer structure with a dielectric layer (combination of PTFE and air) to generate standing waves for uniform excitation, and air gaps to avoid electrical contact. Eigenmode analysis is used to review axial ratio improvement.
2：Sample Selection and Data Sources:
A 16×16-element slot array antenna is fabricated and measured. Simulations are performed using ANSYS HFSS Ver.
3：List of Experimental Equipment and Materials:
Copper plates, PTFE dielectric material, air gaps, WR-15 waveguide for feeding, vector network analyzer (VNA) for measurements, and anechoic chamber for radiation pattern measurements.
4：Experimental Procedures and Operational Workflow:
Fabrication involves diffusion bonding of laminated copper plates, assembly with dielectric layer and air gaps, and measurements of reflection, axial ratio, radiation patterns, and gain. Time-gating analysis is conducted to identify reflection sources.
5：Data Analysis Methods:
Frequency characteristics are analyzed using simulations and measurements, with statistical comparisons and eigenmode analysis to interpret results.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
