研究目的
To study the cutoff frequency of the quad-ridge flared horn with respect to its ridge and develop a high-efficiency QRFH operating from 6 GHz to 18 GHz.
研究成果
The study successfully developed a high-efficiency QRFH operating from 6 to 18 GHz with return loss less than -10 dB and aperture efficiency above 55.8% when used with a reflector antenna. The measured results agreed well with simulations, validating the design and analysis methods.
研究不足
The paper does not explicitly mention limitations, but potential areas could include the complexity of manufacturing the QRFH, the reliance on simulation software which may have inaccuracies, and the specific frequency range (6-18 GHz) limiting broader applicability.
1：Experimental Design and Method Selection:
The study involved designing a quad-ridge flared horn (QRFH) based on analysis of ridge curves and ridge gap effects on modes. CST simulation software was used for calculations due to the complexity of the quad-ridge waveguide boundary.
2：Sample Selection and Data Sources:
A QRFH prototype was manufactured with specific dimensions (ridge gap g=
3：8mm, throat radius ar=4mm, aperture radius ap=50mm, horn length l=60mm). List of Experimental Equipment and Materials:
CST simulation software, GRASP software for efficiency calculations, and measurement equipment for S-parameters and radiation patterns (specific models not mentioned).
4：Experimental Procedures and Operational Workflow:
The QRFH was designed using exponential ridge curves; simulations were performed with CST; the prototype was tested for return loss, port isolation, and radiation patterns; it was used to illuminate a 4m diameter parabolic reflector antenna with F/D=0.49; aperture efficiency was calculated using GRASP.
5：49; aperture efficiency was calculated using GRASP. Data Analysis Methods:
5. Data Analysis Methods: S-parameters and radiation patterns were compared between simulated and measured results; aperture efficiency was tabulated across frequencies.
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