基于介质片加载实现MIMO介质谐振器天线解耦

提出了一种通过在介质谐振器(DR)上表面侧边加载介质片(DS)来实现1×2 MIMO介质谐振器天线(DRA)解耦的新方法。1×2 MIMO DRA采用双层介质基板结构以优化阻抗匹配特性和辐射特性，两DR的边到边间距为0,天线工作在毫米波频段。所加载的DS使得DR内的场重新分布并向DS加载区域以及DS内集中，从而减弱耦合到另一DR单元的场强以实现解耦效果。基于ANSYS HFSS的仿真结果表明天线的-10 dB阻抗匹配带宽为25.6%(22.75～29.43 GHz),带内最大实现了30 dB的隔离度的增强。

Decoupling for MIMO Dielectric Resonator Antennas Based on Dielectric Sheets Loading

A new simple method to decouple a 1×2 MIMO dielectric resonator antenna (DRA) by loading a dielectric sheet (DS) on the upper surface of the dielectric resonator (DR) at the lateral side is proposed. The 1×2 MIMO DRA adopted a double-layer dielectric substrates structure to optimize impedance matching and radiation characteristics. The edge-to-edge distance between the two DRs was 0, and the antenna operated in the millimeter wave frequency band. The loaded DS caused the E-field within the DR to redistribute and concentrate towards the DS loading area and within the DS, thereby weakening the field strength coupled to another DR unit to achieve decoupling effect. The simulation results based on ANSYS HFSS software show that the -10dB impedance matching bandwidth of the antenna is 25.6% (22.75~29.43GHz), and a maximum isolation enhancement about 30dB is achieved within the impedance matching bandwidth.