Alanazi Meshari D, Khamas Salam K
Electrical Engineering Department, Jouf University, Sakaka 72388, Saudi Arabia.
Communications Research Group, Department of Electronic and Electrical Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, UK.
Micromachines (Basel). 2023 Feb 12;14(2):436. doi: 10.3390/mi14020436.
A novel approach is proposed to design a circularly polarized (CP) hemispherical dielectric resonator antenna (DRA) with a wide axial ratio (AR) bandwidth by incorporating an additional dielectric substrate between the antenna and the ground plane. This is in addition to the lower feeding substrate that is located between the ground plane on one side and the feeding microstrip line on the other side. Adding another substrate on top of the ground plane provided an additional degree of freedom in the design that facilitated the achievement of ab 18% AR bandwidth. In addition, an integrated hemispherical DRA and perforated substrate configuration was utilized to achieve optimum effective substrate permittivity and overcome the DRA alignment and assembly challenges while maintaining the achieved wide CP bandwidth. A close agreement was achieved between measurements and simulations.
提出了一种新颖的方法来设计一种圆极化（CP）半球形介质谐振器天线（DRA），通过在天线和接地平面之间加入一个额外的介质基板，实现宽轴比（AR）带宽。这是除了位于一侧接地平面和另一侧馈电微带线之间的下层馈电基板之外的。在接地平面之上添加另一个基板，在设计中提供了额外的自由度，有助于实现18%的轴比带宽。此外，采用集成半球形DRA和穿孔基板配置，以实现最佳有效基板介电常数，并克服DRA对准和组装挑战，同时保持所实现的宽CP带宽。测量结果与模拟结果吻合良好。
