光束转向
光学
电介质
辐射模式
相对介电常数
带宽(计算)
耗散因子
介电常数
还原(数学)
物理
材料科学
计算机科学
天线(收音机)
梁(结构)
光电子学
数学
电信
几何学
作者
Sheng Huang,King Yuk Chan,Rodica Ramer
标识
DOI:10.1109/tap.2021.3118777
摘要
A concept based on engineering a dielectric filling material to adjust the phase velocity of the propagating electromagnetic wave in a horn antenna is proposed. The resulting transformation from the spherical to plane wave at the aperture is used to prove that the size reduction of the horn is achievable. The designed antenna demonstrates more than 50% size reduction with improved radiation pattern, including the sidelobe level (SLL) and satisfactory gain when compared to the commercial horn antenna. It also offers a wide bandwidth from 22 to 26.5 GHz. This design is further elaborated for a continuous, from −21° to +21°, beam steering along the electric polarization implementation by asymmetrical dielectric insertions, with a measured relative bandwidth around 27.1%. The two simple designs are liquid crystal display (LCD) 3-D printed using a commercial UV resin, with the relative permittivity $\varepsilon _{r} =2.75$ and loss tangent around 0.025. The fabrication method allows easy control of the effective permittivity of dielectric–air combined units at low cost.
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