基于介质片加载实现MIMO介质谐振器天线解耦

Decoupling for MIMO Dielectric Resonator Antennas Based on Dielectric sheets Loading

摘要:

提出了一种通过在介质谐振器(DR, Dielectric Resonator)上表面侧边加载介质片(DS, Dielectric Sheet)来实现1×2 MIMO 介质谐振器天线(DRA, Dielectric Resonator Antenna)解耦的简单的新方法。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。

Abstract:

A new simple method is proposed for decoupling 1×2 MIMO dielectric resonator antennas. 1×2 MIMO DRA adopts a double-layer dielectric substrates structure to optimize impedance matching and radiation characteristics. The edge-to-edge distance between the two DRs is 0, and the antenna operates in the millimeter wave frequency band. The loaded DS causes 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 -10 dB impedance matching bandwidth of the antenna is 25.6% (22.75~29.43 GHz), and a maximum isolation enhancement about 30 dB is achieved within the impedance matching bandwidth.