研究目的
To develop a novel circular-polarization (CP) ultra-wideband dielectric rod antenna design for operating from X to Ka band.
研究成果
The resultant CP dielectric rod antenna exhibited good simulated antenna performance within 10 to 40 GHz with a fairly stable gain of greater than 8 dBic, less than ±3 mm longitudinal phase center variation, less than 3 dB axial ratio, and 70%~80% radiation efficiency.
研究不足
The design requires careful tradeoff especially when the length of rod is to be kept minimal. The rotational symmetry of the main beam deteriorates above 30 GHz.
1：Experimental Design and Method Selection:
The design was based on the previous dual linear-polarization 3-layer dielectric rod design. A novel CP wave-launcher composed of conical spiral arms was developed.
2：Sample Selection and Data Sources:
The dimensions are scaled down by a factor of
3：45 for X to Ka band operation. List of Experimental Equipment and Materials:
The design utilizes a novel CP wave-launcher and a novel quadrifilar conducting enclosure.
4：Experimental Procedures and Operational Workflow:
The design principles and final antenna performance were discussed and demonstrated via full-wave simulation results obtained using ANSYS HFSS software.
5：Data Analysis Methods:
The simulated antenna performance exhibits an axial ratio (AR) of less than 3 dB, stable gain, stable beamwidth, and stable phase center from 10 to 40 GHz.
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