研究目的
To propose a wideband fully-metallic impedance-matching horn lens antenna based on glide symmetry realized in the gap waveguide technology, overcoming the limitation of large phase deviations at the interface of traditional lens antennas and increasing the directivity.
研究成果
The proposed iterative method effectively corrects phase deviations at the lens surface, enhancing the antenna's directivity. The glide-symmetric metallic pin configuration provides stable refractive index distributions, broadening the working bandwidth. The antenna demonstrates excellent performance with a broad operation bandwidth and can be extended to millimeter bands.
研究不足
The intrinsic dielectric loss, high fabrication costs, and limited power durability pose challenges for applications especially at high frequencies. The phase profile on the lens aperture may deviate due to fabrication and assembly errors.
1：Experimental Design and Method Selection:
The design involves a multiple iterative method to correct phase deviations at the lens surface, employing glide-symmetric configurations of inner metallic pins within the gap waveguide to construct the artificial dielectric lens.
2：Sample Selection and Data Sources:
The lens is composed of metallic pins arranged in glide symmetry configuration to achieve stable refractive index distributions in a wide bandwidth.
3：List of Experimental Equipment and Materials:
A prototype of the horn lens antenna is manufactured using aluminum and processed by a milling machine.
4：Experimental Procedures and Operational Workflow:
The antenna is fed by a stepped double ridged gap waveguide and ended with a tapered structure as an impedance transition to reduce undesired reflections.
5：Data Analysis Methods:
The performance is evaluated based on reflection coefficient S11 and far-field radiation patterns.
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