A two-port multiple input multiple output (MIMO) dielectric resonator antenna is proposed where two orthogonally connected feed lines are combined to unite two orthogonally produced modes. The feed lines build a hybrid network. The backplane is defected by a circular defected ground structure (CDGS), which is extended by two rectangular slits placed orthogonally with the input ports. The antenna uses a single ‘H/I’-shaped dielectric resonator (DR) element. It covers frequency spectrum from 7.29 to 10.65 GHz and fulfils the international telecommunication union (ITU) (8–8.5 GHz) and Maritime Radio Navigational (8.85–9 and 9.2–9.5 GHz) application bands. The antenna offers very high port isolation (>18 dB) and diversity properties throughout the whole application band. The antenna also provides circular polarization (AR ≤ 3 dB) in the operating ranges from 8 to 8.25 GHz and 8.85 to 8.9 GHz. Simulated and measured results make clear to the antenna most suitable for MIMO operation.

中文翻译：

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互耦低的紧凑型单元件介质谐振器MIMO天线

提出了一种两端口多输入多输出（MIMO）电介质谐振器天线，其中将两条正交连接的馈线组合在一起以组合两个正交产生的模式。馈电线建立了一个混合网络。背板由圆形缺陷接地结构（CDGS）缺陷，该结构由与输入端口正交放置的两个矩形狭缝延伸。天线使用单个“ H / I”形介电共振器（DR）元件。它涵盖了7.29至10.65 GHz的频谱，并满足了国际电信联盟（ITU）（8–8.5 GHz）和海上无线电导航（8.85–9和9.2–9.5 GHz）的应用频段。天线在整个应用频带内提供很高的端口隔离度（> 18 dB）和分集特性。该天线还在8至8.25 GHz和8.85至8.9 GHz的工作范围内提供圆极化（AR≤3 dB）。仿真和测量结果清楚地表明了最适合MIMO操作的天线。