一种低剖面轮廓的超宽带介质谐振器天线设计

Design of a low-profile dielectric resonator antenna for ultra-wideband application

针对多数介质谐振器天线剖面较高的问题,设计了一种低剖面介质谐振器天线。将薄片等边三角形介质谐振器安置于介质基片上,使用变形共面波导激励方法,激励了天线的主模TMx101和邻近的高阶模TMx103,在保证天线具有低剖面的前提下获得了超宽带特性。对天线的表面电流和工作模式进行了分析,解释了它的超宽带和低交叉极化工作原理。天线的剖面高度为1.524 mm,覆盖2.42~11.53 GHz,适用于小型无线通信设备。实验测试表明这种天线达到了设计目标。

To address the problem of high-profile of most dielectric resonator antennas(DRAs), a low-profile DRA was designed to solve the problem. A laminate triangular dielectric resonator was placed on a dielectric substrate, and the main mode(TMx101) and adjacent higher-order mode(TMx103) were excited using the deformed coplanar waveguide excitation method, obtaining the ultra-wideband characteristics under the premise of ensuring the antennas’ low-profile. The surface current and working mode of the antenna were analyzed, and its ultra-wideband and low cross-polarization working principles were explained. The thickness of the antenna was 1.524 mm, covering a range of 2.42~11.53 GHz, which is suitable for small wireless communication devices. The experimental results show that the antenna meets the design goals.