Two Port Fractal-Shaped MIMO Antenna with Triple Band Rejection Capability for UWB Applications

M. Sharma, Pradnya A. Gajbhiye, S. Singh
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引用次数: 1

Abstract

A fractal-shaped two port triple band rejection capability UWB-MIMO antenna is designed and also examined in this communication. The proposed antenna has developed on the low cost roger substrate with total size of the substrate 12 mm x 45 mm and has relative permittivity of the 2.3 with thickness of 0.8 mm. The fractal-shaped geometry is carved in the patch component and ground plane is utilized to obtained wide impedance bandwidth 2 GHz - 20 GHz. The patch element is carved with fractal shaped geometry and a partial ground plane is used to attain a broad impedance bandwidth of 2 Ghz to 20 Ghz. Triple band rejection characteristics is introduced into the proposed antenna by creating U shaped slot with in feed-line. The antenna parameters are separated from one another by placing them orthogonally and by inserting E-shaped ground stubs between them. TARC, ECC, diversity gain and surface current are all used to examine the antenna's MIMO performance. The suggested Multiple Input Multiple Output antenna is rejected frequency bands 2.8 Ghz - 3.5 Ghz, 4.2 Ghz-4.8 Ghz, and 7.4 Ghz - 7.8 Ghz. These triple notch bands are WLAN/Wi-Fi, military fixed and mobile communications, and point to point communication. Isolation less than −25 dB, lower value of ECC (< 0,001) and good band rejection capacity of the antenna is desirable to deploy the proposed antenna for UWB applications.
具有超宽带三波段抑制能力的双端口分形MIMO天线
设计了一种分形双端口三频带抑制能力的UWB-MIMO天线,并对其进行了研究。该天线是在低成本的栅极衬底上研制的,衬底总尺寸为12 mm × 45 mm,相对介电常数为2.3,厚度为0.8 mm。在贴片元件上雕刻分形几何形状,利用接地面获得2 GHz ~ 20 GHz的宽阻抗带宽。贴片元件被雕刻成分形几何形状,部分地平面被用来获得2 Ghz到20 Ghz的宽阻抗带宽。通过在馈线中创建U型槽,引入三频带抑制特性。天线参数通过正交放置和在它们之间插入e形接地桩来相互分离。采用TARC、ECC、分集增益和表面电流等指标来考察天线的MIMO性能。建议多输入多输出天线在2.8 Ghz ~ 3.5 Ghz、4.2 Ghz ~ 4.8 Ghz和7.4 Ghz ~ 7.8 Ghz频段被拒绝。这些三缺口频段是WLAN/Wi-Fi、军事固定和移动通信以及点对点通信。隔离小于- 25 dB,较低的ECC值(< 0.001)和良好的带抑制能力是为UWB应用部署所建议天线的理想条件。
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