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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A low-profile quad-port UWB MIMO antenna using defected ground structure with dual notch-band behavior
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A low-profile quad-port UWB MIMO antenna using defected ground structure with dual notch-band behavior

机译：使用具有双凹口频段行为的缺陷地面结构，一种低调的四端口UWB MIMO天线

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摘要

A compact (45 × 45 × 1.6 mm~3) ultrawide-band (UWB), multiple-input multiple-output (MIMO) design using microstrip line feeding is presented. The proposed design comprises four elliptical monopoles placed orthogonally on a cost-effective FR-4 substrate. In order to improve the impedance bandwidth and lessen the return loss of the MIMO antenna, defects in ground plane are created by etching symmetrical square slots and half-rings. Moreover, a different method (of unsymmetrical H-shaped slot with C-shaped slot) was proposed into the patch to introduce dual-band rejection performance from UWB at center frequency 5.5 GHz (covering lower WLAN as well as upper WLAN) and 7.5 GHz (X band). In addition, a stub is introduced at the edge of each defected ground structure to obtain isolation >–22 dB covering entire performing band from 2 to 16.8 GHz (where, S11 < –10 dB). The proposed design has miniaturized size, very low envelop correlation coefficient less than 0.1, stable gain (2-4 dBi except for notch bands). Furthermore, various MIMO performance parameters are within their specifications, such as diversity gain (= 10 dB), total active reflection coefficient (<–5 dB, and channel capacity loss (<0.35 bits/s/Hz). The presented design is optimized using the HFSS software, and fabricated design is tested using vector network analyzer. The experimental results are in good agreement with the simulation results.
机译：呈现了紧凑型（45×45×1.6mm〜3）超法带（UWB），使用微带线馈送的多输入多输出（MIMO）设计。所提出的设计包括在经济高效的FR-4衬底上正交放置的四个椭圆单据。为了改善阻抗带宽并减少MIMO天线的回波损耗，通过蚀刻对称方框和半环来产生地面平面中的缺陷。此外，提出了一种不同的方法（带有C形槽的非对称H形槽）进入贴片，以在中心频率5.5GHz（覆盖下WLAN以及上WLAN）和7.5 GHz的UWB中引入双频带抑制性能。 （x频段）。另外，在每个缺陷的接地结构的边缘引入了一个存根，以获得覆盖从2到16.8GHz的整个执行带的隔离> -22dB（其中，S11 <-10 dB）。所提出的设计具有小型化尺寸，非常低的包络相关系数小于0.1，稳定增益（除了缺口带除外）的稳定增益（2-4 dBi）。此外，各种MIMO性能参数在其规范内，例如分集增益（= 10 dB），总有源反射系数（<-5 dB和信道容量损耗（<0.35位/ s / hz）。所呈现的设计优化使用HFSS软件，使用矢量网络分析仪测试制造的设计。实验结果与模拟结果吻合良好。

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